CP Piston & Ring Set for Mitsubishi 4B11 Evo X - Bore (86mm) - Size (Standard) - 9.1 CR - Single

If you're rebuilding the engine in your Mitsubishi 4B11 Evo X and need a solid set of pistons, this forged set from CP Pistons is a popular choice. These are designed for a standard 86mm bore and feature a 9.1 compression ratio, making them a good option for many performance builds where you want to maintain a similar compression level to stock but with the strength of forged aluminum. CP Pistons are well-known in the performance world for their robust construction.

Forged pistons are made by shaping aluminum under extreme pressure, which creates a much denser and stronger grain structure compared to cast pistons. This makes them significantly more resistant to the higher cylinder pressures and temperatures found in modified or performance engines. This set includes the pistons and rings, simplifying your parts sourcing for the rebuild. Remember, these pistons are not CARB approved and cannot be shipped to California.