About the BMW M5 VSX carbon fiber rear diffuser:The Kies Carbon BMW M5 VSX carbon fiber rear diffuser was designed specifically for the F10 generation BMW M5 super sedans.With quality and fitment in mind, we wanted to bring only the best to our fellow enthusiasts, so if you’ve been considering this upgrade but something held you back from pulling the trigger, we believe we have the answer for you.When you shop with us, you can buy with confidence that you will be getting a top notch product backed by incredible customer service and a money back guaranty.We stand behind our manufacturer, our products, and our QC process to ensure that you are getting a spectacular hand-made product that looks great and fits great.NOTE: If you have the M Sport rear bumper or one of our Kies Carbon rear bumpers on any of the other F10 BMW 5 series (non M5), you can also replace the rear diffuser with this one. You will however need to modify your exhaust to accommodate the quad setup. Don’t worry, we have you covered on that front as well.