Mahle OE GM 6.6L Duramax 06-09 LMM LBZ Vin 26D .040 Left Bank Only Piston Set (Set of 4)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. This Part Fits: Year Make Model Submodel 2006 2010 Chevrolet Express 2500 Base 2006 Chevrolet Express 2500 LS 2006 Chevrolet Express 2500 LT 2006 2010 Chevrolet