JE Pistons is the leader in forged racing pistons. With 70-plus years of experience, in-house forging, and industry-leading technology, JE Pistons are designed to perform at the top levels of all forms of motorsports. Piston Set, 2618, Inv Dome/Dish, 3.4055 Bore, 1.220 CD, 0.866 Pin Dia, Set of 6. BMW M3 Base United States S52B32 USA