The Gates Heavy Duty Micro‑V belt for 2007–2010 Ford Mustang with the 5.4L V8 is specified as K10 and sized 1‑3/8 in by 84‑25/32 in. This serpentine accessory belt is offered as a heavy‑duty replacement intended to restore proper drive to alternator, power steering and other accessory systems while matching the factory belt dimensions.
Gates 07-10 Ford Mustang V8 5.4L K10 1-3/8in x 84-25/32in Heavy Duty Micro-V Belt