Enginetech Part Number: 128000 Crankshaft Kit With Bearings Fits 1988-2005 GM/Chevrolet 3.1L 189 OHV V6 12V VIN 'J,M,T,V,W' Turbo & Non-Turbo - 89.00mm Bore ---- Engines with distributor-less ignition. Shaft has reluctor ring. Fits 1991-2005 GM/Chevrolet 3.4L 207 OHV/DOHC 12V/24V VIN 'E,F,S,X' - 92.00mm Bore Forging Numbers: 981, 1X-148071, 17, 268