Genuine Ford UPGRADED Primary chain tensioners (left and Right) CAST IRON instead of plastic with built in fail safe ratchet in case of oil pressure loss. A great upgrade for those stock plastic tensioners. Fits: 1996-2004 Mustang GT 1996-2004 Mustang Cobra / Mach One 2005-2010 Mustang GT 1996-2009 F150 4.6 and 5.4 All Navigator and Aviator Applications
