Performer-Link timing chain sets are for use with Edelbrock or stock cams. They have a solid-bushing chain for a true bearing surface that rolls with the sprockets, eliminating chain stretch. Cam sprockets are made from 35,000 psi tensile strength cast iron. Crank sprockets are made from billet SAE-1144 steel and induction heat treated. Three Performer-Link sets are stock replacement parts and 50-state legal (see listings in bold type). All other sets have three keyway setting points to ensure accurate timing selection for early or late-model vehicles. Performer-Link timing sets are not for use above 6500 rpm. Edelbrock Performer-Link By Cloyes Timing Chain Set 7812 Includes Cam/Crank Sprocket/Chain - 55-82 Pontiac 287-455 - Not For Sale Or Use On Pollution Controlled Motor VehiclesSolid Bushing Chain Resists StretchingFor Use with Stock or Edelbrock CamshaftsStressproof Steel Crank Gears3 Keyway Setting Points To Ensure Accurate TimingTrue Bearing Surface Rolls with the SprocketsApplications include: Bonneville, Catalina, Executive, Firebird, Firebird Trans Am, Grand Am, Grand Lemans, Grand Prix, Grand Safari, Grandville, Gto, Lemans, Safari, Star Chief, Tempest, Ventura, Pontiac, 1979, 1978, 1977 Pit Stop USAoffers Edelbrock Performer-Link By Cloyes Timing Chain Set 7812 at low everyday prices. Be sure to check out all of the products from Edelbrock including Edelbrock Engine Parts and Accessories, Edelbrock Valve Train Components, Edelbrock Timing Chains, Edelbrock Timing Chains - Pontiac V8.