Edelbrock E-Force 122 Supercharger 57-86 Small-Block Chevrolet w/ Conventional Cylinder HeadsThe Edelbrock 122 Supercharger Kit part #1551 for 1955 86 302 400 CID Small Block Chevrolets is a positive displacement supercharger that is capable of producing 500+ horsepower on a small block Chevy engine. This system utilizes the Eaton H122 rotor assembly for maximum efficiency in a compact package. The compact design may potentially fit under the hood of most muscle car and street rod applications. Testing resulted in a peak of 507 horsepower and