Mahle OE Piston Set (Set of 8)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 1975 1977,1980 1981 Buick Century Base 1975 1979,1984 1988