JE Pistons Ultra Series Mitsubishi 4B11T 86.5mm Bore 10.0:1 CR Set of 4 Pistons

When you're building a high-performance Mitsubishi 4B11T engine, you need parts that can handle serious stress. This set includes four JE Pistons Ultra Series pistons, designed specifically for your engine. These aren't just standard replacement pistons; they're built from the ground up for engines that see high boost and extreme cylinder pressures. You get the pistons themselves, along with high-strength wrist pins from Trend Performance, ready to be installed.

What sets these Ultra Series pistons apart is JE's proprietary Aligned Grain Flow forging technology. This process maximizes the material's tensile strength, making them incredibly tough for demanding applications. They also come with custom-level features you'd typically only find in bespoke builds. The thermal barrier crown coating helps reflect heat, keeping temperatures down and improving how efficiently the engine scavenges exhaust gases. On the sides, a skirt coating reduces friction and wear on both the piston and cylinder walls, which also helps quiet things down, especially during a cold start. Plus, lateral gas ports are included to help maintain a solid seal on the top compression ring, even when you're running high RPMs and significant boost.

JE Pistons makes these entire sets 100% in the USA, ensuring solid construction. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a high-horsepower build, these pistons are a well-built choice that brings advanced features to your engine.