Both Sprockets Made From Billet Steel, Then Heat-Treated For Unmatched Durability. Crank Sprocket Contains Nine Keyways. True Roller .250 Diameter Chain. Includes Captured Needle Bearing. Hand-Matched At The Factory To Ensure Proper Center 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.