This listing is for a KING Rod & Main & Cam Bearings Kit compatible replacement for 1997-2003 Chevy GM Pontiac 4.8 4.8L 5.3 5.3L 5.7 5.7L 6.0L LS1 & LS6Plus new Melling Oil Pump.Vin Codes "V" "T" "G" or "U". VIN refers to the 8th digit in the vehicles ID in lower driver side dash. All in standard sizes! PLEASE NOTE: THE CAM BEARINGS IN THIS KIT ARE FOR THE EARLIER DESIGN WITH #1 & #5 POSITION HOUSING BORE SIZE AT 2.3260"-2.3280". GM made a cam bearing change in 2003 with A 2ND DESIGN WITH 2.346"-2.3480" Housing Bore THAT REQUIRES A DIFFERENT CAM BEARINGS SET. THIS APPLIES TO 2003 YEAR MODELS ONLY. Please be sure you have HOUSING BORE SIZE AT 2.3260"-2.3280". We offer under size bearings at no extra cost, please message us the under sizes you need to check availability before ordering. Otherwise, we ship standard bearings.