JE Pistons BMW Ultra Series +12cc Dish 82mm Bore Piston Kit (Set of 6)

JE Pistons is well-known for making strong, reliable engine components, and their Ultra Series pistons are a prime example of that commitment. If you're building a high-horsepower BMW engine, especially one that will see significant boost, this set of six Ultra Series pistons is designed to handle the extreme cylinder pressures you'll encounter. They feature JE's proprietary Aligned Grain Flow forging technology, which is an in-house process that maximizes the material's tensile strength to stand up to the rigors of performance builds.

These pistons come with custom-level features usually found in much more expensive, bespoke setups. You'll find a thermal barrier crown coating that reflects heat back into the combustion chamber, helping to keep piston crown temperatures down and improving how efficiently exhaust gases are scavenged. The skirt coating is there to reduce friction and wear on the piston skirts and cylinder walls, which also helps quiet down engine noise, particularly when the engine is cold. For maintaining a solid ring seal even at high RPMs and under high boost, lateral gas ports are included to help keep that top compression ring sealed tight.

This kit also includes high-strength, thick-wall wrist pins made by Trend Performance in the USA, built to handle the demands of power-adder engines. Optimized pin oiling features are incorporated to ensure the pin, pin bores, and small-end stay well-lubricated, reducing heat and wear. Every aspect of these Ultra Series pistons is optimized for high-horsepower racing engines, and they are proudly made 100% in the USA.