CP Piston & Ring Set for Mitsubishi 4G63 2G/Evo 8/9 - Bore (85.0mm) - Size (STD) - CR (10.0/10.5)

This product is a forged piston and ring set designed for the Mitsubishi 4G63 engine, specifically for the 2nd generation, Evo 8, and Evo 9 models. You get a complete set of pistons and the corresponding rings needed for installation. This set is built to the standard bore size of 85.0mm and offers a compression ratio of 10.0:1 or 10.5:1, depending on the specific piston variant within the set. These are well-built components intended for engine rebuilds where improved performance and durability are key.

CP Pistons is known for making strong internal engine components. These pistons are forged, meaning they start as a solid block of aluminum that is heated and hammered into shape under extreme pressure. This process creates a denser, stronger grain structure than cast pistons, making them more resistant to the high pressures and temperatures found in performance engines. The standard bore size means they are intended to fit directly into a block machined to factory specifications, simplifying the rebuild process. The specified compression ratio is crucial for tuning your engine's power output and efficiency.

Please note that this piston and ring set is not CARB approved and cannot be shipped to California. Always refer to your vehicle's specific service manual for detailed installation procedures and torque specifications.