CP Piston & Ring Set for Mitsubishi 4G63 2G/EVO VIII-IX - Bore (85mm) - Size (STD) - CR (8.5/9.0)

Forged from high-strength 2618 aluminum alloy, these CP Pistons are built to handle the demands of a performance Mitsubishi 4G63 engine. The 85mm bore and standard size mean they're ready for a fresh rebuild, while the 8.5:1 to 9.0:1 compression ratio offers a solid balance for boosted applications, allowing for significant power gains without sacrificing too much drivability. CP Pistons are well-known for their precision manufacturing, ensuring each piston is a near-perfect match for its intended application.

This set includes the pistons and rings, making it a convenient package for your engine build. The 2618 aluminum alloy is chosen for its excellent strength-to-weight ratio and thermal expansion properties, which are crucial for high-performance engines that experience extreme temperatures and pressures. CP Pistons also incorporates features like lateral gas-shoulders and accumulator grooves to help manage combustion pressures and oil control, contributing to overall engine health and longevity under stress.

When rebuilding your 4G63, especially for a 2nd Gen DSM, Evolution VIII, or Evolution IX, using a well-built set of forged pistons like these from CP Pistons is a critical step. They are designed to withstand higher cylinder pressures and temperatures compared to cast pistons, making them ideal for modified engines. Remember that this part is not CARB approved and cannot be shipped to California.