CP Piston & Ring Set for 4G63 2G-Bore (85.0rmm)-Size (Std)-CR (10.0 Eclipse / 10.5 Evo 8/9)

This is a set of forged pistons and rings from CP Pistons, specifically designed for the 4G63 engine. These pistons are standard bore at 85.0mm and offer a 10.0:1 compression ratio for the Eclipse and a 10.5:1 compression ratio for the Evo 8/9. CP Pistons are well-known in the performance engine building world for their robust construction and ability to handle high-stress applications.

Forged pistons are made from a solid block of aluminum that is heated and then hammered into shape under extreme pressure. This process creates a much stronger and more durable piston than cast pistons, which are made by pouring molten aluminum into a mold. The strength of these forged pistons means they can withstand higher cylinder pressures and temperatures, making them a popular choice for turbocharged or supercharged engines, or any build pushing the limits of the stock engine. The included rings are essential for proper sealing between the piston and cylinder wall, which is critical for performance and engine longevity.

When rebuilding or significantly upgrading your 4G63 engine, choosing the right pistons is a crucial step. These CP Pistons offer a solid foundation for a high-performance build. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.