CP Piston & Ring Set for Mitsubishi 4B11 Evo X - Bore (86.5mm) - Size (+0.5mm) - Compression Ratio (

If you're rebuilding the engine in your 2008-2014 Mitsubishi Lancer Evolution X, especially for a performance build, a solid set of pistons is crucial. This CP Pistons Piston & Ring Set is built specifically for the 4B11 engine, offering a robust upgrade over stock components. These aren't just replacements; they're designed to handle more power and stress, making them a popular choice for enthusiasts looking to push their Evo X further.

Crafted from forged aluminum, these pistons are significantly stronger and more durable than cast pistons. This forging process aligns the grain structure of the aluminum, allowing them to withstand higher cylinder pressures and temperatures without deforming or failing. The set includes precisely matched rings, ensuring a proper seal between the piston and cylinder wall for optimal compression and oil control. This particular set is sized at 86.5mm with a +0.5mm overbore, which is common when rebuilding an engine that may have seen some wear or when aiming for a slight displacement increase. The compression ratio is also a key factor for tuning, and these pistons are designed with that in mind for the 4B11 engine.

When installing these pistons, it's important to follow the manufacturer's recommended clearances and lubrication procedures. Proper installation is key to unlocking their full potential and ensuring long-term reliability. This set is a well-built foundation for a high-performance engine build, offering the strength and precision needed for demanding applications.