Will the 2015 Mustang’s independent rear suspension (IRS) be sourced from the Ford Fusion and Lincoln MKZ? According to one reader of American Muscle Blog, that will indeed be the case. This piece of information was posted by Jason Odziana on their blog. Odziana is currently working with FTE Automotive, who has supplied Ford with clutch, brakes and suspension systems for years now, so he may very well know exactly what he’s talking about.