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Your cart is empty.These Magnum Roller Rocker Arms for Small Block Chevy 265-400 applications are the ultimate street rocker. With a 3/8 inch 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.
John Sengers
Reviewed in the United States on February 7, 2020
Wish i would have bought 16.I bought this to supplement the weak exhaust port in the chevy Gen 1 small block head.Took these out, and put in 16 1.6 full roller rockers.So they all matched.Made a difference you can feel.Only thing I don’t like is the area around the adjusting nut is very tight.Had to use a thinwall socket when i adjusted the valves.
Aileen Radi
Reviewed in the United States on October 1, 2017
Good parts for a great price.
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