Mahle Clevite Piston set (2001-15) GM 6.6L Duramax 0.040 over

16.5CR w/ 0.075in pockets Bore (in): 4.095 in. Bore (mm): 104.013mm Piston Style: Dish, with four valve reliefs Piston Material: Forged aluminum Compression Distance (in): 1.956 in. Piston Head Volume (cc): +41.80cc Wrist Pin Style: Press-fit or floating Quantity: Sold as a set of 8.