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"B" 37B NOS Quadrajet  Primary Metering Rods, .037"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Very limited quantities available. Rod Specifications:
Double taper design “B”
Cruise diameter: .037"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 37B rod has a large diameter of .037" and a small diameter "power tip" of .026". The .037" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.   Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2537B-NOS
"B" 38B NOS Quadrajet  Primary Metering Rods, .038"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Very limited quantities available. Rod Specifications:
Double taper design “B”
Cruise diameter: .038"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 38B rod has a large diameter of .038" and a small diameter "power tip" of .026". The .038" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.   Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2538B-NOS
"B" 39B NOS Quadrajet  Primary Metering Rods, .039"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Very limited quantities available. Rod Specifications:
Double taper design “B”
Cruise diameter: .039"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 39B rod has a large diameter of .039" and a small diameter "power tip" of .026". The .039" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.   Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2539B-NOS
"B" 42B Quadrajet / Dualjet Primary Metering Rods, .042"/.026" t


Qty: 2 Rods - Used to tailor primary part throttle air/fuel enrichment . Fits...see more

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Rod Specifications:
Double taper design
Cruise diameter: .042"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 42B rod has a large diameter of .042" and a small diameter "power tip" of .026". The .042" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.…see more

Part Number
2542B
"B" 43B NOS Quadrajet  Primary Metering Rods, .043"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Very limited quantities available. Rod Specifications:
Double taper design “B”
Cruise diameter: .043"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 43B rod has a large diameter of .043" and a small diameter "power tip" of .026". The .043" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.   Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2543B-NOS
"B" 43B Quadrajet / Dualjet Primary Metering Rods, .043"/.026" t


Qty: 2 Rods - Used to tailor primary part throttle air/fuel enrichment . Fits...see more

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Rod Specifications:
Cruise diameter: .043"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 43B rod has a large diameter of .043" and a small diameter "power tip" of .026". The .043" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.…see more

Part Number
2543B
"B" 44B Quadrajet / Dualjet Primary Metering Rods, .044"/.026" t


Qty: 2 Rods - Used to tailor primary part throttle air/fuel enrichment . Fits...see more

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Rod Specifications:
Cruise diameter: .044"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 44B rod has a large diameter of .044" and a small diameter "power tip" of .026". The .044" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.…see more

Part Number
2544B
"B" 45B NOS Quadrajet  Primary Metering Rods, .045"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Very limited quantities available. Rod Specifications:
Double taper design “B”
Cruise diameter: .045"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 45B rod has a large diameter of .045" and a small diameter "power tip" of .026". The .045" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.   Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2545B-NOS
"B" 45B Quadrajet / Dualjet Primary Metering Rods, .045"/.026" t


Qty: 2 Rods - Used to tailor primary part throttle air/fuel enrichment . Fits...see more

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Rod Specifications:
Cruise diameter: .045"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 45B rod has a large diameter of .045" and a small diameter "power tip" of .026". The .045" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.…see more

Part Number
2545B
"B" 46B NOS Quadrajet  Primary Metering Rods, .046"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Very limited quantities available. Rod Specifications:
Double taper design “B”
Cruise diameter: .046"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 46B rod has a large diameter of .046" and a small diameter "power tip" of .026". The .046" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.   Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2546B-NOS
"B" 47B NOS Quadrajet  Primary Metering Rods, .047"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Very limited quantities available. Rod Specifications:
Double taper design “B”
Cruise diameter: .047"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 47B rod has a large diameter of .047" and a small diameter "power tip" of .026". The .047" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.   Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2547B-NOS
"B" 48B NOS Quadrajet  Primary Metering Rods, .048"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Very limited quantities available. Rod Specifications:
Double taper design “B”
Cruise diameter: .048"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 48B rod has a large diameter of .048" and a small diameter "power tip" of .026". The .048" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.   Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2548B-NOS
"B" 48B Quadrajet / Dualjet Primary Metering Rods, .048"/.026" t


Qty: 2 Rods - Used to tailor primary part throttle air/fuel enrichment . Fits...see more

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Rod Specifications:
Cruise diameter: .048"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 48B rod has a large diameter of .048" and a small diameter "power tip" of .026". The .048" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.…see more

Part Number
2548B
"B" 49B NOS Quadrajet  Primary Metering Rods, .049"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Very limited quantities available. Rod Specifications:
Double taper design “B”
Cruise diameter: .049"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 49B rod has a large diameter of .049" and a small diameter "power tip" of .026". The .049" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.   Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2549B-NOS
"B" 49B Quadrajet / Dualjet Primary Metering Rods, .049"/.026" t


Qty: 2 Rods - Used to tailor primary part throttle air/fuel enrichment . Fits...see more

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Rod Specifications:
Cruise diameter: .049"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 49B rod has a large diameter of .049" and a small diameter "power tip" of .026". The .049" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.…see more

Part Number
2549B
"B" 50B Quadrajet / Dualjet Primary Metering Rods, .050"/.026" t


Qty: 2 Rods - Used to tailor primary part throttle air/fuel enrichment . Fits...see more

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits all 1974 and earlier Rochester Quadrajet carburetors, also some later year truck and marine carburetors. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet. Rod Specifications:
Cruise diameter: .050"
Power tip diameter:.026"
Rod overall length: 2.465" - 2.480" Primary Rod Tech:
A 50B rod has a large diameter of .050" and a small diameter "power tip" of .026". The .050" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "B" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.…see more

Part Number
2550B
"J" 32J NOS Quadrajet  Primary Metering Rods, .032"/.026"

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single medium length taper design “J”
Cruise diameter: .032"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 32J rod has a large diameter of .032" and a small diameter "power tip" of .026". The .032" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "J" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2532J-NOS
"J" 36J NOS Quadrajet  Primary Metering Rods, .036"/.026"

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single medium length taper design “J”
Cruise diameter: .036"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 36J rod has a large diameter of .036" and a small diameter "power tip" of .026". The .036" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "J" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2536J-NOS
"J" 37J NOS Quadrajet  Primary Metering Rods, .037"/.026"

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single medium length taper design “J”
Cruise diameter: .037"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 37J rod has a large diameter of .037" and a small diameter "power tip" of .026". The .037" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "J" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2537J-NOS
"J" 38J NOS Quadrajet  Primary Metering Rods, .038"/.026"

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single medium length taper design “J”
Cruise diameter: .038"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 38J rod has a large diameter of .038" and a small diameter "power tip" of .026". The .038" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "J" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2538J-NOS
"J" 40J NOS Quadrajet  Primary Metering Rods, .040"/.026"

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single medium length taper design “J”
Cruise diameter: .040"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 40J rod has a large diameter of .040" and a small diameter "power tip" of .026". The .040" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "J" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2540J-NOS
"J" 41J NOS Quadrajet  Primary Metering Rods, .041"/.026"

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single medium length taper design “J”
Cruise diameter: .041"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 41J rod has a large diameter of .041" and a small diameter "power tip" of .026". The .041" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "J" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2541J-NOS
"J" 42J NOS Quadrajet  Primary Metering Rods, .042"/.026"

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single medium length taper design “J”
Cruise diameter: .042"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 42J rod has a large diameter of .042" and a small diameter "power tip" of .026". The .042" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "J" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -…see more

Part Number
2542J-NOS
"J" 43J NOS Quadrajet  Primary Metering Rods, .043"/.026"

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single medium length taper design “J”
Cruise diameter: .043"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 43J rod has a large diameter of .043" and a small diameter "power tip" of .026". The .043" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "J" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
see more

Part Number
2543J-NOS
"J" 44J NOS Quadrajet  Primary Metering Rods, .044"/.026"

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single medium length taper design “J”
Cruise diameter: .044"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 44J rod has a large diameter of .044" and a small diameter "power tip" of .026". The .044" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "J" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -…see more

Part Number
2544J-NOS
"J" 54J Quadrajet  Primary Metering Rods, .054"/.026"

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Rod dimensions are NOT stamped in rod. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single medium length taper design “J”
Cruise diameter: .054"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 54J rod has a large diameter of .054" and a small diameter "power tip" of .026". The .054" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "J" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2554J
"J" 56J Quadrajet  Primary Metering Rods, .056"/.026"

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Rod dimension is NOT stamped in rod. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single medium length taper design “J”
Cruise diameter: .056"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 56J rod has a large diameter of .056" and a small diameter "power tip" of .026". The .056" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "J" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2556J
"K" 37K NOS Quadrajet  Primary Metering Rods, .037"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single full length taper design “K”
Cruise diameter: .037"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 37K rod has a large diameter of .037" and a small diameter "power tip" of .026". The .037" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "K" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2537K-NOS
"K" 38K NOS Quadrajet  Primary Metering Rods, .038"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single full length taper design “K”
Cruise diameter: .038"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 38K rod has a large diameter of .038" and a small diameter "power tip" of .026". The .038" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "K" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2538K-NOS
"K" 40K NOS Quadrajet  Primary Metering Rods, .040"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single full length taper design “K”
Cruise diameter: .040"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 40K rod has a large diameter of .040" and a small diameter "power tip" of .026". The .040" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "K" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2540K-NOS
"K" 41K NOS Quadrajet  Primary Metering Rods, .041"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single full length taper design “K”
Cruise diameter: .041"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 41K rod has a large diameter of .041" and a small diameter "power tip" of .026". The .041" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "K" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2541K-NOS
"K" 42K NOS Quadrajet  Primary Metering Rods, .042"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single full length taper design “K”
Cruise diameter: .040"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 40K rod has a large diameter of .040" and a small diameter "power tip" of .026". The .040" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "K" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2542K-NOS
"K" 43K NOS Quadrajet  Primary Metering Rods, .043"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single full length taper design “K”
Cruise diameter: .043"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 43K rod has a large diameter of .043" and a small diameter "power tip" of .026". The .043" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "K" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2543K-NOS
"K" 44K NOS Quadrajet  Primary Metering Rods, .044"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single full length taper design “K”
Cruise diameter: .044"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 44K rod has a large diameter of .044" and a small diameter "power tip" of .026". The .044" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "K" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2544K-NOS
"K" 44K Quadrajet / Dualjet Primary Metering Rods .044"/.026" ti


Qty: 2 Rods - Used to tailor primary part throttle air/fuel enrichment . Fits...see more

Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet carburetors. Rod Specifications:
Cruise diameter: .044"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets with Electronic Mixture Control Solenoid (MCS) Note:
"44K" is not stamped into rod, this rod does not have any identification stamped into rod shaft. Primary Rod Tech:
A 44K rod has a large diameter of .044" and a small diameter "power tip" of .026". The .044" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "K" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage.…see more

Part Number
2544K
"K" 45K NOS Quadrajet  Primary Metering Rods, .045"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single full length taper design “K”
Cruise diameter: .045"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 45K rod has a large diameter of .045" and a small diameter "power tip" of .026". The .045" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "K" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2545K-NOS
"K" 46K NOS Quadrajet  Primary Metering Rods, .046"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single full length taper design “K”
Cruise diameter: .046"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 46K rod has a large diameter of .046" and a small diameter "power tip" of .026". The .046" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "K" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2546K-NOS
"K" 47K NOS Quadrajet  Primary Metering Rods, .047"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single full length taper design “K”
Cruise diameter: .047"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 47K rod has a large diameter of .047" and a small diameter "power tip" of .026". The .047" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "K" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2547K-NOS
"K" 48K NOS Quadrajet  Primary Metering Rods, .048"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single full length taper design “K”
Cruise diameter: .048"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 48K rod has a large diameter of .048" and a small diameter "power tip" of .026". The .048" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "K" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2548K-NOS
"K" 49K NOS Quadrajet  Primary Metering Rods, .049"/.026"

New Old Stock (NOS) original Rochester Products primary metering rods. These original rods are no longer produced by Rochester Products and very difficult to find.  Rochester Quadrajet primary metering rods are used to tailor primary part throttle air/fuel enrichment . Fits most 1975 and later non-electronic Rochester Quadrajet carburetors, except some truck and marine carburetors that use the early style rods. Dimension stamped in rod indicates maximum diameter of taper. Quantity: 2 Primary Metering Rods for Rochester Quadrajet and Dualjet carburetors. Rod Specifications:
Single full length taper design “K”
Cruise diameter: .049"
Power tip diameter:.026"
Rod overall length: 2.395" - 2.400"
Does NOT fit Quadrajets or Dualjets with Electronic Mixture Control Solenoid (MCS)   Primary Rod Tech:
A 49K rod has a large diameter of .049" and a small diameter "power tip" of .026". The .049" section of the rod is positioned in the metering jet during light throttle driving. During heavy acceleration, manifold vacuum decreases allowing the power piston to rise positioning the small diameter (.026") power tip in the metering jet.
Larger diameter rods will lean part throttle/cruise air fuel mixtures. All "K" primary metering rods have the same small diameter power tip (.026"). A great way to fine tune your Q-Jet for better driveablity and fuel mileage. Note: -
For additional in depth information on Primary Metering Rods (Go to the Primary Metering Rod Tech Info page  )…see more

Part Number
2549K-NOS
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