Made From 8620 Chromemoly Steel That Will Not Flex
1:52 Ratio
Used On Cylinder Heads With Screw-In Studs & Guide Plates Only
Fits 1955-1985 Small Block
As a result it has been dyno-tested to produce 15-20 horsepower increases and it makes valve stems and guides last longer. Magnum Rockers fit all 55-85 small block engines (1.52 rocker ratio). Each rocker is supplied with a rocker ball and lock nut. Set of 16. Fits all 1955, 1956, 1957 Chevy small block vehicles. SPECIAL NOTE: For cylinder heads with press in studs, machine work to install screw in studs and guide plates is required.
Vehicle Fitment:
The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
