JE Pistons BMW Ultra Series +9.10cc Dish 82mm Bore Piston Kit (Set of 6)

JE Pistons' Ultra Series pistons start with a unique Aligned Grain Flow forging process, an in-house technique that maximizes tensile strength. This is crucial for handling the extreme cylinder pressures you'll encounter in high-boost, power-adder engine builds. These aren't just basic pistons; they come with custom-level features right out of the box, all made 100% in the USA.

You'll find a thermal barrier crown coating on these pistons, which is a ceramic-based material that reflects heat back into the combustion chamber. This helps lower piston crown temperatures and can improve exhaust gas scavenging. The skirts are coated to reduce friction and wear against the cylinder walls, which also helps quiet down engine noise, especially during a cold start. To keep things well-lubricated under high stress, these pistons feature enhanced pin oiling, and lateral gas ports are included to help maintain a strong ring seal even at high RPMs and under significant boost.

This kit includes six pistons, each with an 82mm bore and a -9.10cc dish volume. They also come with high-strength, thick-wall wrist pins from Trend Performance, designed specifically for the demands of high-horsepower applications. If you're building a serious performance engine and need pistons that can handle the heat and pressure, these are a solid option.