Edelbrock 7808 Performer-Link Timing Chain and Gear Set Cam sprockets are made from 35,000 PSI tensile strength cast iron Has a solid-bushing chain for a true bearing surface that rolls with the sprockets, eliminating chain stretch Thrust bearing, offset bushings, gaskets, bolts and studs are not included Crank gears are machined and made from billet SAE-1144 steel and induction heat-treated Performer-Link timing sets are not for use above 6,500 RPM