CP Piston & Ring Set for Mitsubishi 4G63 2G/Evo 8/9 85.5mm Bore 88mm Stroke + .5cc Dome

CP Pistons is well-known for making strong internal engine components for high-performance applications. This piston and ring set is built for the Mitsubishi 4G63 engine, commonly found in the Lancer Evolution models 8 and 9, as well as earlier 2G DSM cars. If you're rebuilding the top end of your 4G63 for more power or durability, these pistons are a solid choice.

These pistons are forged from high-strength aluminum, which is a tougher material than cast aluminum and can better handle the increased cylinder pressures and temperatures that come with a performance build. The 85.5mm bore size is a common upgrade over the stock bore, and the 88mm stroke works with many popular crankshafts for this engine. The +.5cc dome volume is designed to work with specific cylinder head configurations to achieve a desired compression ratio, often around 8.5:1 to 9.0:1 depending on the head gasket thickness and combustion chamber volume. This set includes the pistons and rings, ready for installation.

When installing these pistons, it's important to follow the manufacturer's recommended clearances and lubrication procedures. Because these are a performance part, they are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation guide for precise details on fitting these pistons into your 4G63 engine.