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 replacement. Included are fulcrums and posi locks. Note: None rail type are typically used on early heads with slotted pushrod holes or can be used with guide plates If using heads with larger pushrod holes and NO means of rocker positioning then please use our self aligning PFERRK-3004
