Diamond Power Full Gasket Set & Intake & Exhaust Valves works with GM Chevy Isuzu Saab 4.2L DOHC 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 02-09 GM Chevy Isuzu Saab L6 4.2L 256 DOHC 24V Vortec All Gaskets are made with Premium quality materials to deliver a perfect fit on your cars engine