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Whiteline adjustable rear upper control arm for S197 Ford Mustang applications. Built from 4130 Chromalloy with a longer arm length introduced in 2011, it reduces brake hop and stiff axle tramp compared to the stock arm. A synthetic elastomer bushing with pinhole voiding allows articulation without binding, while an eccentric crush tube enables pinion angle and instant-center adjustment. Protective plating and a heavy-duty mount improve durability; an install guide is included.
Whiteline 11-14 Ford Mustang GT/Shelby GT500 (S197) Adjustable Rear Upper Control Arm
