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

If you're rebuilding the engine in your Mitsubishi 4G63 2G or Evo 8/9, a solid set of pistons is crucial for performance and reliability. This set from CP Pistons is built for those looking to get the most out of their 4-cylinder powerplant. These are forged pistons, which means they start as a solid block of aluminum that's heated and hammered into shape under immense pressure. This process creates a much stronger and more durable piston than cast aluminum, making them ideal for higher horsepower applications and demanding use.

This particular set is designed for a standard 85.0mm bore and features a compression ratio of 10.0:1 to 10.5:1, depending on your specific cylinder head volume. This compression ratio is a popular choice for naturally aspirated builds or those running moderate boost levels, offering a good balance between power and pump gas compatibility. CP Pistons are well-known for their precise manufacturing and attention to detail, ensuring each piston fits right and performs as expected. The set includes the necessary rings to complete the piston assembly, saving you a trip to the parts store.

When installing these pistons, it's important to follow the manufacturer's recommended clearances and lubrication procedures. Proper ring gap setting and cylinder wall preparation are key to a long-lasting engine build. This set is intended for performance builds and is not CARB approved, meaning it cannot be shipped to California. Always consult your engine builder or a trusted mechanic for specific installation advice and to ensure compatibility with your complete engine setup.