Aluminium Roller Rocker Set 1.6 Ratio (3/8" Stud Mount) Suit SB Chev Vortec With Self Alighning Rocker

Fits Chevy small block engines w/ center hold-down valve covers. Rid your engine of internal friction with roller-tipped rocker arms. Therace-proven full needle bearing, fulcrum and roller tip not only unleash horsepower, they also lengthenvalve train component life andreduce wear and tear on valve stem tips. Precision machined to insure consistency and ratio accuracy. 16 extruded aluminum roller rockers and 16poly locks.