JE Pistons BMW S50B30 86mm Bore 11.5:1 Comp Ratio - Set of 6

Starting with a 2618 aluminum forging, these JE Pistons for your BMW S50B30 are built for serious performance. This material choice is key because it offers the high tensile strength needed to handle the demands of high-performance engines, whether you're pushing your car on the track or just want the best for your street build. Each piston is forged and machined right here in the USA, ensuring a well-built component designed specifically for the S50B30 engine.

JE Pistons uses their proprietary Forged Side Relief (FSR) design, which helps minimize friction and power loss by using a reduced skirt width. This design, along with a shorter wrist pin, also contributes to saving weight. Depending on the specific application, these pistons may also feature an accumulator groove to help manage combustion gas pressure, leading to better ring seal and consistent power delivery. Some applications also include a skirt coating that further reduces friction and wear on the piston skirts and cylinder walls, which can also help quiet down engine noise.

This set includes six pistons, each with an 86mm bore and a 11.5:1 compression ratio, along with high-quality wrist pins, locks, and JE Pro Seal premium piston rings. They are designed to be a direct fit for the S50B30 Euro engine. Please note that these pistons are not CARB approved and cannot be shipped to California.