Holley Street Avenger Model 4150 570 CFM 4-Barrel Carburetor - Square Bore - Manual Choke - Vacuum Secondary - Dual Inlet - Silver Firesuit Jacket LT1 V8 OptiSpark II

LT1 V8 OptiSpark II

rear bellow

Wide 5 Spindle

Allen Wrench Included

The damping curve allows for complete control of suspension at low shaft speeds without creating extreme forces at high shaft velocities

Holley Street Avenger Model 4150 570 CFM 4-Barrel Carburetor - Square Bore - Manual Choke - Vacuum Secondary - Dual Inlet - Silver Firesuit Jacket LT1 V8 OptiSpark IIHolley Street Avenger Carburetor 0 81570 4 bbl 570 CFM Vacuum Secondary Manual Choke Not Legal For Sale Use In California Adjustable Vacuum Secondary 4th Generation Power Valve Fuel Metering System Built In Secondary Fuel Filters External Float Adjustable w Sight Plug On Vehicle Electric Choke 4 Vacuum Ports Street Ready; Out Of The Box Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every NASCAR