JE Pistons BMW N54B30 Ultra Series 3.327in Bore 9.5:1 CR - Single Piston

If you're building a high-performance BMW N54B30 engine, these Ultra Series pistons from JE Pistons are a solid option. They're designed to handle the extreme cylinder pressures that come with significant boost. The 3.327-inch bore and 9.5:1 compression ratio are specific to certain N54B30 applications, making them a direct fit for those builds.

What sets these pistons apart is the attention to detail for demanding builds. JE uses their proprietary Aligned Grain Flow forging process, which creates a stronger piston structure. You'll also find a thermal barrier crown coating that helps reflect heat back into the combustion chamber, keeping the piston cooler. The lateral gas ports are there to help maintain a strong seal on the top compression ring, even when you're running high boost and high RPMs. Plus, the skirt coating helps reduce friction and noise, especially when the engine is cold.

These pistons are made 100% in the USA and come with high-strength wrist pins from Trend Performance. Keep in mind that these are not CARB approved and cannot be shipped to California.