Mahle OE M54 B30 (306S3) Piston w/ Ring Set 84.5mm Bore 48.3mm Length (Set of 6) for BMW

MAHLE(R) pistons are OE quality and have the same great OE features such as compensated ring grooves to assure proper ring loading and oil control, as well as expansion controlled designs for small fitting clearances to reduce engine noise, wear, emissions, and improve oil control. MAHLE is one of the largest OE piston manufacturers in the world.