Billet Crankshaft Sprocket Has Three Keyways for +/- 4 Degrees Adjustability. Crankshaft Sprocket Heat Treated for Durability. Seamless TRUE Roller 0.250 Roller Diameter Chain for Reduced Friction. 100% USA Made Product Features:The complete kits, which meet or exceed OEM performance requirements, ensure a quiet and maintenance-free experienceCloyes parts are CAD designed and manufactured using premium materials. Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performanceCloyes Timing Kits may include camshaft sprockets, crankshaft sprockets, timing chains, tensioners, and guidesRefer to our online catalog for detailed application-specific informationKeep your engine's valve train in perfect time with Cloyes, the world leader in timing drive systems.