Mahle OE GM 4.2L 06-09 0.75MM Piston Set (Set of 6)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. MAHLE is one of the largest OE piston manufacturers in the world. This Part Fits: Year Make Model Submodel 2006 2007 Buick Rainier CXL 2008 Chevrolet Trailblazer Base