Set of (8) Pistons & matching Rings bundle Kit compatible with 1999-2003 GM Chevrolet 4.8L Truck engines. Available in your choice of sizes. VIN Code V, C or A. 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 and these pistons have press-fit piston pins and can only be used with press-fit connecting rods. Ring package for each piston is 2-1.5mm compression rings & 1-3.0mm Oil Ring. Comp. Height 1.338. Pin Diameter .945. Please confirm pin diameter! Pistons are: Stroke: 3.267 in. (4.8L) Connecting Rod Length: 6.275 in. (4.8L), rods NOT included Piston Top Style: Flat top with no valve reliefs Compression Height: 1.338 in. Piston Material: Hypoeutectic aluminum Wrist Pin Diameter: .945 in.; pins included Wrist Pin Style: Press-fit only Ring Land Sizes: 1.5mm-1.5mm-3.0mm (oil ring); rings included Notes: Phosphate and graphite coated