JE Pistons BMW S50B30US 9:1 KIT Set of 6 Pistons

If you're rebuilding the engine in your BMW S50B30US, this JE Pistons 9:1 compression ratio kit is a solid choice for performance and durability. JE Pistons has been making forged pistons for a long time, and they build these right here in the USA using 2618 aluminum. This material is chosen because it's strong and can handle the high stresses found in performance engines.

This kit includes six pistons, each featuring JE's proprietary Forged Side Relief (FSR) design. This design helps reduce friction and weight by using a narrower skirt and a shorter wrist pin, which can also lead to a slight reduction in noise. Depending on the specific application, you might also find an accumulator groove to help manage combustion gases and improve ring seal, along with a skirt coating to further cut down on friction and wear. These pistons are specifically designed for the S50B30US engine, ensuring they work well with its unique characteristics.

When you get this kit, you'll find everything you need to get the pistons installed, including high-quality wrist pins, locks, and JE's Pro Seal premium piston rings. Just remember, these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.