This kit contains ACL Race series rod and main bearings STD size and ACL Cam bearings for Pre-2003 LS engines. If your engine is 2003 you will need to measure the cam bore to ensure it is 2.327" in positions 1 and 5. Suits Pre 03 LS enginesSuits LS1 with cam bore 2.327" in positions 1 and 5 See below for the cam bore differences.
1st Design- Part # CH10: Fits 1997-2003 engines where the block housing bore on positions 1 and 5 measures 2.3270"" & bearing width is: 0.630"
2nd Design- Part # CH23: Fits 2003-2007 engines where the block housing bore on positions 1 and 5 measures 2.3470" & bearing width is: 0.630"
3rd Design- Part #CH25: Fits 2003-2013 engines where the block housing bore on positions 1 and 5 measures 2.3470" & bearing width is: 0.775"
Here at Malex Motorsports all of our items are in stock in our Sydney based store, ready to ship or pick up.