CP Piston & Ring Set for Mitsubishi 4G63 2G/Evo 8/9 - Bore 86.0mm - Size +1.0mm - Stroke 88 - CR 10

This is a CP Pistons forged piston and ring set specifically for the Mitsubishi 4G63 engine, commonly found in the 2G DSM and Evolution 8/9 models. This set is designed for an 86.0mm bore and is sized at +1.0mm, meaning it's intended for engines that have been bored out to accommodate this larger size during a rebuild. The pistons are built to handle the demands of performance applications, featuring a 10:1 compression ratio with an 88mm stroke.

CP Pistons are well-known in the performance engine building community for their robust construction. These pistons are forged from high-strength aluminum alloy, which offers a good balance of durability and weight savings. This forging process creates a denser, stronger piston structure compared to cast pistons, making them more resistant to the extreme pressures and temperatures generated in high-performance engines. The set includes the necessary rings, which are crucial for proper sealing between the piston and cylinder wall, ensuring optimal compression and oil control. This is a critical component for anyone rebuilding or upgrading their 4G63 engine for increased power and reliability.

When rebuilding an engine with these pistons, it's important to ensure the cylinder walls are properly honed to the correct size and surface finish for optimal ring seal. Always refer to the manufacturer's installation instructions for precise clearances and assembly procedures. This set is not CARB approved and cannot be shipped to California.