Rid your engine of internal friction with roller-tipped rocker arms. The race-proven roller tip not only unleashes horsepower, it also lengthens valve train component life and reduces wear and tear on valve stem tips. Precision machined to insure consistency and ratio accuracy. Each rock er includes a bronze bushing, and a newly designed shaft-to-rocker self oiling system. 16 blue anodized alumi num roller rockers with laser-etching, hardened shaft, and hardware included. Stock mounting bolts are not included and should be re-used.