Diamond Power Full Gasket Set works with Nissan Altima Sentra DOHC L4 2.5L ENGINE QR25DE 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 02-06 Nissan Altima Sentra 2.5L QR25DE All Gaskets are made with Premium quality materials to deliver a perfect fit on your cars engine