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Holley, Ford, Autolite Power Valve, 4.5" HG 1Holley, Ford, Autolite Power Valve, 4.5" HG 2Holley, Ford, Autolite Power Valve, 4.5" HG 3

Holley, Ford Autolite Power Valve / Enrichment Assembly
Includes gasket.

Fits:
Ford Motorcraft Autolight 4100 carburetors
Ford Motorcraft Autolight 2100, 2150 carburetors
Holley carburetors

Quantity: 1
Number of Stages: 1 Stage
Vacuum rating: 4.5" HG

Over All Length: 1.1"
Power valve head diameter: 1"

Note:
Power valves supply additional fuel to the main system during heavy load or full power situations. Power valves are rated to indicate the vacuum opening point. For example, a power valve rated at 5.5” will open when the engine vacuum drops to 5.5" or below.

Generally, the power valve selected should be 1/2 the idle intake manifold vacuum reading. EXAMPLE: 15” Hg vacuum reading divided by 2 = 7.5 power valve. Most Stock engine combinations require either 7.5" or 8.5" power valve.

Quantity:
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