JE Pistons Ultra Series Mitsubishi 4B11T 87mm Bore 10.0:1 CR Set of 4 Pistons

When you're building a high-performance Mitsubishi 4B11T engine, you need pistons that can handle serious power. This set of four Ultra Series pistons from JE Pistons is designed specifically for that purpose. They feature an 87mm bore and a 10.0:1 compression ratio, making them a solid choice for boosted applications where strength and reliability are paramount.

What sets these pistons apart is JE's proprietary Aligned Grain Flow forging technology, which significantly increases tensile strength to withstand extreme cylinder pressures. You also get custom-level features like a thermal barrier crown coating that reflects heat back into the combustion chamber, helping to keep crown temperatures down. The skirts are coated to reduce friction and wear on both the piston and cylinder walls, which also helps quiet things down, especially during a cold start. Plus, they include lateral gas ports to help maintain a strong ring seal even at high RPMs and under high boost, ensuring consistent power delivery.

These pistons are built with high-strength wrist pins from Trend Performance, designed for the rigors of power-adder builds. Every feature on these Ultra Series pistons is optimized for high-horsepower racing engines, and they are made 100% in the USA. Keep in mind that this set is not CARB approved and cannot be shipped to California. For a robust engine build, these JE Pistons offer a well-built foundation.