This listing is for eight (8) hyper eutectic flat top, coated skirt pistons and a matching moly piston ring set compatible with 2004-2006 GM 5.7L LS6 V-8 engines with floating pins. In your choice of sizes. Please click size needed before adding to cart! Head Type: Flat top with no valve reliefs. Piston Material: Hyper eutectic aluminum. Compression Height: 1.330 in. Wrist Pin Style: Press-fit. Wrist Pin Diameter: .943 in.; pins included. NOTE: PLEASE CONFIRM PIN DIAMETER OF .943" DIAMETER. SOME EARLIER 2004 MODELS HAD PIN DIAMETER OF .945".