Diamond Power Oil Pump works with 1991-2008 4.0L B4000 Navajo Mazda 4.0L, 1990-2002 4.0L Aerostar Explorer Ranger Explorer Sport Trac Mountaneer, 1986-1992 2.9L Ranger Bronco II 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 1991-2008 4.0L B4000 Navajo Mazda 4.0L; Fits 1990-2002 4.0L Aerostar Explorer Ranger Explorer Sport Trac Mountaneer; Fits 1986-1992 2.9L Ranger Bronco II Oil Pumps are made with the best quality materials (aluminum) required by the manufacturer