JE Pistons BMW S50B30US 3.406 Bore Inv. Dome 11.5:1 CR (Single Piston)

This listing is for a single JE Pistons forged piston, designed for the BMW S50B30 USA engine. You'll receive the piston itself, along with high-quality wrist pins, locks, and JE Pro Seal premium piston rings. This piston features an inverted dome design and a 3.406-inch bore, intended to achieve an 11.5:1 compression ratio when installed.

JE Pistons builds these from 2618 aluminum, a strong material chosen for its high tensile strength, which is crucial for demanding engine builds. They are forged and machined 100% in the USA, with a specific design for the S50B30 USA engine to help optimize performance and durability. Some applications may include a skirt coating to reduce friction and noise, and an accumulator groove to help maintain a consistent seal from the piston rings under combustion pressure. The proprietary Forged Side Relief (FSR) design also helps minimize friction and save weight.

This piston is intended for performance applications and is not CARB approved, meaning it cannot be shipped to California. Be sure to check manufacturer documentation for any specific installation requirements or recommendations for your build.