Whiteline 16mm Rear Sway Bar Kit (86/BRZ)Fitment Guide: 86 BRZ, 12 21 Description Engineered to 'Activate More Grip', sway bars are principally designed to reduce body roll or sway. By reducing body roll, lateral loads are spread more evenly across the tyres thereby increasing cornering grip and improving outright performance. This Whiteline 16mm 3 point adjustable sway bar = more grip = better handling = outright performance it's the best dollar for dollar handling improvement you can make