Enginetech Part Number: 129000 Crankshaft Kit With Bearings Fits GM/Chevrolet 1999-2006 5.3L 325 OHV 16V - 3.780in Bore Fits GM/Chevrolet 1997-2004 5.7L 346 OHV 16V VIN 'G,S' - 99.00mm Bore Fits GM/Chevrolet 1999-2006 6.0L 364 OHV 16V - 4.000in Bore Forging Numbers: 1255, 2216 With 24-tooth reluctor. Rear Flange Width = 0.857in