Holley Power Valve 4.5" STD Flow #125-45 MHC5024 472 in Dim

472 in Dim

higher torque applications with positive grip and balance

N) – Al2O3

This construction also contributes to exact fit compliance between the cylinder head and header flange

Holley Power Valve 4.5" STD Flow #125-45 MHC5024 472 in DimThese 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