The Edelbrock #12685 Single Stage 8.5 Hg Power Valve operates by using engine vacuum to control the opening and closing rate. During heavy load or under full power situations, they open to supply additional fuel to the main system to eliminate hesitation and bogging, ensuring the smooth delivery of power without any drivability concerns.

More From This Category

Holley Power Valve, High Flow, Single Stage, 5.5 in. Hg with Gasket, Each

Holley Power Valve, High Flow, Single Stage, 5.5 in. Hg with Gasket, Each

$35.10

View
Holley Power Valve, Standard Flow, Single Stage, 9.5 in. Hg with Gasket, Each

Holley Power Valve, Standard Flow, Single Stage, 9.5 in. Hg with Gasket, Each

$22.63

View
Edelbrock Power Valve, 1-Stage, Standard Flow, 2.5 in. Hg., Demon, Holley, Quick Fuel, Each

Edelbrock Power Valve, 1-Stage, Standard Flow, 2.5 in. Hg., Demon, Holley, Quick Fuel, Each

$23.16

View
Holley Power Valve, High Flow, Single Stage, 8.5 in. Hg with Gasket, Each

Holley Power Valve, High Flow, Single Stage, 8.5 in. Hg with Gasket, Each

$35.10

View