COMP Cams 1442-1 - Magnum Roller Rocker, FS/Olds Non-Rail

COMP Cams Magnum Roller Rocker Arm, 1.6 ratio, 3/8" Stud Diameter for Small Block Ford '61-'67 (Non Rail) 260-455 Oldsmobile and 290-401 AMC, Single Piece These Magnum Roller Rocker Arms for Ford V8 289-351W (Non Rail Type), 260-455 Oldsmobile and 290-401 AMC applications are the ultimate street rocker. With a 3/8" stud diameter and 1.6 ratio, they are designed for serious performance enthusiasts. All Magnum Roller Rocker Arms are constructed from 8620 chromemoly steel, which is a superior material that will not flex and assures maximum lift. Their roller tip reduces friction, while stiff design and superior ratio accuracy yield more effective valve lift. With a 15 to 30 horsepower increase over other rocker arms, Magnum Roller Rockers are perfect for performance applications with less than 350 lbs. open spring pressure. Don't accept inferior products or cheap knock-offs, look for the COMP Cams logo stamped into the underside of every Magnum Rocker. For Ford V8 289-351W (Non Rail Type), 260-455 Oldsmobile and 290-401 AMC applications; Roller tip reduces friction while stiff design and superior ratio accuracy yields more effective valve lift; 15 to 30 horsepower increase over stock rocker arms; Use in any applications with less than 350 lbs. open spring pressure; Made from 8620 chromemoly steel that will not flex