This listing is for a set of 8 Pistons compatible with 2002-2008 GM Chevrolet Pontiac Cadillac 6.0L LQ9 & LS2 engines used in Corvettes Escalades, GTO, SSR, CTS. VIN Codes "N & "U". VIN refers to the 8th character in the vehicles ID in lower dash reading from left to right. These are Hypereutectic coated skirt Flat Top Pistons with Floating Pins. Comp. Height 1.328. Pin Diameter .943 (IMPORTANT NOTE: Please be sure you Pin diameter is .9429). Some VIN Code "U" engines have a larger .9451" pin diameter that is different and these will not work with your rods. Click size needed before adding to Cart!