CP Piston & Ring Set for 4G63 2G-Bore (86.0rmm)-Size (+1.0)-CR (8.5 Eclipse / 9.0 Evo 8/9)

If you're rebuilding the engine in your Mitsubishi Eclipse or Evo 8/9, especially if you're pushing more power than stock, a set of strong pistons is crucial. This CP Pistons set is built for those demanding applications, designed to handle the increased stress and heat that come with performance tuning. These aren't your average cast pistons; they're forged from high-strength aluminum alloy, which means they can withstand higher cylinder pressures and temperatures without deforming or failing.

This particular set is sized for a 2G 4G63 engine with an 86.0mm bore, and it's a +1.0mm oversize, meaning it's intended for engines that have been bored out to match. The compression ratio is listed at 8.5:1 for Eclipse applications and 9.0:1 for Evo 8/9 models, giving you a good balance for boosted performance without excessive detonation risk. CP Pistons are well-known in the performance community for their durability and precision. They come with high-quality rings, wrist pins, and locks, so you have most of what you need to get them installed. Remember to check your specific engine's bore and stroke, and consult with your machine shop to ensure these pistons are the correct choice for your build's clearance and compression targets.

When installing forged pistons, it's important to have your cylinders honed to the correct finish for proper ring seal, and to ensure your crankshaft and connecting rods are balanced. These pistons are a significant upgrade over stock, providing the foundation for a reliable, high-performance engine build. Please note that these pistons are not CARB approved and cannot be shipped to California.