JE Pistons BMW S50B30US 86.25mm Bore 9:1 KIT Pistons Set of 6

If you're rebuilding the engine in your BMW S50B30US for high-performance use, a strong set of pistons is crucial. This kit from JE Pistons is built specifically for that purpose, offering a 9.1:1 compression ratio with an 86.25mm bore size. JE Pistons has been making forged pistons for decades, and they engineer these for demanding applications where durability and performance go hand-in-hand.

These pistons are forged in the USA from 2618 aluminum, which gives them the high tensile strength needed to handle the stresses of a performance engine. They feature JE's proprietary Forged Side Relief (FSR) design, which helps minimize friction and reduce weight by using a narrower, shorter skirt and wrist pin. Depending on the specific application, you might also find an accumulator groove to help reduce combustion gas pressure and improve ring seal, along with a skirt coating to cut down on friction, wear, and noise. This kit comes complete with high-quality wrist pins, locks, and JE Pro Seal premium piston rings, so you have everything needed to get them installed.

Because these are performance pistons designed for specific engine builds, it's important to note they are not CARB approved and cannot be shipped to California. Ensure you have the correct specifications for your build before ordering.