Double Roller 9 Keyway Billet Steel Timing Chain Kit for Ford SB 289 302 351 Windsor Ford SB 289 302 351 Windsor Double Roller 9 Keyway Billet Steel Timing Chain Kit Maximum Advance/Retard at Camshaft: 4 degree Maximum Advance/Retard at Crankshaft: 8 degree SMALL BLOCK;FORD 5.0L/5.8L LATE MODEL TIMING CHAIN Material:Billet steel.Thrust Bearing Included.