MAHLE Original 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.These are a great replacement pistons for the Duramax engines. They come stock as 17.5:1 Compression Ratio.



All new MAHLE Group products sold and marketed by MAHLE Aftermarket Inc. and their affiliates are warranted to be free from defects in original materials and workmanship for a period of one (1) year from the date of purchase.