These Magnum Roller Rocker Arms for Ford V8 289-351W (Rail Type) 1968-89 applications are the ultimate street rocker. With a 3/8″ stud diameter and 1.7 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.
Perfect for street performance, our 8620 chromemoly steel Magnum roller tip rockers can handle up to 350 lbs of pressure. These 1450 rail-type rockers feature a 1.7 ratio for 3/8″ stud ’68-’89 Ford 289-351 Windsor.
For Small Block Ford applications, 3/8″ stud, 1.7 ratio; Constructed from 8620 chromemoly steel, a superior material that will not flex and assures maximum lift; 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