Diamond Power P7911-STD Piston Set 2 Year Warranty (This product must be installed by a certified professional mechanic) Same day shipping when purchased before 3pm EST Our products are tested and meet or exceed OEM performance requirements Fits 02-05 Pontiac Grand Am 2-2L 134CID DOHC 16V L4 Pistons made with the best quality materials (Electrolytic Aluminum, Cast Aluminum, Tin and Polish)