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USA made power piston retainer bushing and power piston tuning spring kit are two of our most popular products. A secure, tight fitting power piston retainer will protect your primary metering rods from getting bent when installing the airhorn. Save your rods, replace your PP-retainer today!

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Adjustable Part Throttle (APT) Screw, for power piston adjustmen


APT screw allows adjustment of height of primary metering rods...see more

Adjustable Part Throttle (APT) screw allows adjustment of height of primary metering rods within the primary jets. Great for…see more

Part Number
3630
Mixture Control Solenoid  Plunger - GM

Specifications:
Rod Length: 1.56"
Rod Diameter: 1.75"
Plunger Top: 1.10" x 1.20" Quantity: 1 Replacement Mixture Control Solenoid Plunger used on Computer…see more

Part Number
3137M
Power Piston (APT) Metering Adjustment Screw

Specifications:
Length: 1.10"
Thread diameter: .157" Quantity: 1 Power Piston Metering Adjustment Screw allows adjustment of height of primary metering rods within…see more

Part Number
3137G
Quadrajet / Dualjet Power Piston Retaining Bushing


Nylon bushing replaces your loose fitting original without having to disassemble the power piston...see more

Nylon bushing replaces your loose fitting original without having to disassemble the power piston, due to the unique split design.…see more

Part Number
3622
Quadrajet / Dualjet Power Piston Spring Assortment, 4 color code


Great aid when tuning for a larger than stock camshaft. Engines that...see more

Four color coded power piston springs, allow for fine tuning of primary metering rod engagement. Great aid when tuning for…see more

Part Number
3601
Quadrajet / Dualjet Primary Rod Retaining Spring, fits early sty


Retaining spring is used to retain the primary metering rods to the power piston...see more

Retaining spring is used to retain the primary metering rods to the power piston. Fits all 1974 and earlier…see more

Part Number
2581
Quadrajet / Dualjet Primary Rod Retaining Spring, fits later sty


Retaining spring is used to retain the primary metering rods to the power piston...see more

Retaining spring is used to retain the primary metering rods to the power piston. Fits most 1975 and later…see more

Part Number
2582
Quadrajet / Dualjet Springs for Primary Metering Rods (2 springs


Pair of Metering Rod Springs for 1981-up GM Rochester Quadrajet carburetors. (Long Version)...see more

Specifications:
Length: .710"
Outside diameters: .160" & .100"
Wire diameter: .0075" Pair of Metering Rod Springs for 1981-up GM Rochester CCC Quadrajet carburetors. (Long…see more

Part Number
3603
Retaining Clip for Quadrajet Power Piston


Replaces OEM part # 7034339...see more

Retaining clip is used on some Rochester Quadrajet carburetors to manually hold down the power piston.
Quantity: 1 retaining clip Replaces OEM…see more

Part Number
3621
Spring for APT Power Piston Metering Adjustment

Specifications:
Length: .550"
Outside diameter: .325"
Wire diameter: .030" Quantity: 1 Note:
This spring works with #3137G ATP adjustment screw. (Sold separately)…see more

Part Number
2021C
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