Roller Tip Rocker Arms - Big Block Chevy 7/16" Stud, 1.72 Ratio 

Roller Tip Rocker Arms - Big Block Chevy 7/16" Stud, 1.72 Ratio

These rocker arms offer you the performance advantages of greater durability, plus feature a roller tip to reduce valve and guide wear The stiffer design inhibits flex that causes variation in ratios Higher effective ratios allow more valve lift, and that translates into a 15-30 hp increase.