Manley Timing Chain Kits contain fully machined billet steel camshaft and crankshaft sprockets. Each kit utilize a roller chain with .250” diameter rollers and adjustable 9 keyway crankshaft sprocket. Camshaft sprockets are machined for and include a Torrington thrust bearing. Furthermore, each kit will also include all necessary hardware for installation. If you have any questions about Manley Timing Belts / Serpentine Belts for your vehicle then reach out to one of our experienced representatives and we will help you make a more informative decision.