Holley Power Valve 7.5" STD Flow #125-75 86627 If the optimum suction performance

If the optimum suction performance falls below a certain level

Improve your safety quotient with these Lev-R-Vent radiator caps from Motorad

Ideal for the garage or where quiet portable compressed air is required

6in Technical Spec: Material: Polymide 6

Holley Power Valve 7.5" STD Flow #125-75 86627 If the optimum suction performanceThese power valves are an important component in the power enrichment circuit of Holley's performance carburetors. They operate by using engine vacuum to control their opening and closing rate. When they open, additional fuel is supplied to the main system during heavy load or under full power situations to eliminate hesitation and bogging ensuring the smooth delivery of power without any drivability concerns. They're available in many different