COMP Cams Hi-Tech Roller Timing Set CSWith a cast iron Camshaft Gear and induction hardened billet Steel crank sprocket, this Hi Tech Roller Race Timing Set features a 3 keyway crank sprocket for 4 degree incremental adjustability and 4 degree maximum advance retard. The pre stretched, heat treated double Roller chain with heavy duty large pin design is capable of withstanding the heavy demands of racing Applications Catalog User 1