ITEM NAME:2x Aluminum Alloy Car Refit Rear Bumper Race Air Diversion Diffuser Panels HVF Descriptio n Description:.The rear bumper diffuser allows air to travel through the rear bumper to increase vehicle aerodynamics, which reduces drag and increase speed for the ultimate car racing. It is actually a diffuser that is wind tunnel designed and tested, you could increase rear down force with a rear diffuser.
