Proflow Pro OE Style Upgrade Rockers SB Chev, Holden Chevrolet,1.5 Ratio, 3/8 Stud, 4340 Alloy Steel Roller Tip, Includes Fulcrums & Posi Locks, Kit - PFERRK-3002Part Number: PFERRK 3002 ProFlow's upgraded rocker arms feature high quality rocker bodies that utilize the factory style fulcrum mount. They are made of high grade 4340 Alloy steel construction to ensure long lasting durability and performance. These rocker arms are a perfect upgrade for higher rate springs and performance camshafts. Proflow's roller tip rocker arms are a perfect cost effective upgrade because they cost less than a oem stock