Progress Tech 06-15 Mazda MX-5 Rear Sway Bar (17mm - Adjustable)Progress Tech sway bars dramatically improve handling. How? They minimize the traction robbing body "lean" that rolls part of the outside tires off the pavement. Our Sport tuned Sway Bars replace smaller OEM sway bars and rubber bushings with larger diameter alloy steel bars and harder polyurethane bushings. Adding more "roll stiffness" means less body "lean" or "sway" and the tires remain flatter and better connected to the pavement. The larger and