Cast iron camshaft gear and induction hardened billet steel crank sprocket; Features 3 keyway crank sprocket for 4-degree incremental adjustability, 4-degreemaximum advance/retard; Pre-stretched, heat-treated double roller chain with heavy-duty large pin design; chain available separately; Dynamically balanced and quality checked for run-out tolerances; Ideal for all street performance and race applications PartNumber : cca3154 Description : GM LS Magnum Double Roller Timing Set Title : 3154 Timing Set, LS RHS Double 3Key 3B 1P Crankshaft Gear Material : Billet Steel Engine Family : GM LS 3-Bolt Cam, 1 Pole Reluctor, 24x Replacement Chain Part Number : 9132 Timing Set Series : GM LS Timing Set for RHS/LSX Raised Cam Block California Proposition 65 : WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov Camshaft Gear Material : Billet Steel Chain Type : Double Roller Engine Components::Timing Chains