Whiteline BFR1-KU4 Rear 18mm Swaybar Fits Ford Mustang 69-70Whiteline BFR1 KU4 10 65 73 Ford Mustang Rear 18mm Heaby Duty Sway Bar Features California Proposition 65 WARNING: This product may contain chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to ww. P65Warnings. ca. gov Sway bar 18mm heavy duty Engineered to 'Activate More Grip', sway bars are principally designed to reduce body roll or sway. By reducing body roll,