$595.00 USD
$595.00 USD












Attention BMW G90/G99 M5 enthusiasts: experience the superior design and performance of AutoTecknic’s Dry Carbon Fiber Performante Rear Diffuser crafted specifically for your M5. This advanced rear diffuser engineered with our autoclave vacuum-forming technology mounts seamlessly onto the factory location elevating both the aerodynamic efficiency and visual appeal of your M5. Constructed from authentic 3K Twill-Weave (2X2) Pre-Preg Carbon Fiber the diffuser is finished with multiple layers of high-gloss UV-resistant clear coat providing exceptional durability and an unmistakable sleek aesthetic.
Our dry carbon fiber manufacturing process embodies motorsport-grade quality designed for lightweight strength and precise fitment. Through meticulous autoclave vacuum forming each carbon fiber strand is resin-impregnated molded and cured under vacuum resulting in an even lighter and stronger structure than conventional “wet” carbon fiber. This process minimizes imperfections and ensures a flawless finish free of pinholes or air pockets. The AutoTecknic Performante Rear Diffuser includes robust mounting clips for a secure fit and for optimal installation we recommend removing the rear bumper to facilitate clip insertion. Redefine your BMW G90/G99 M5 with the unparalleled style weight savings and performance benefits of this premium diffuser.
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$595.00 USD
$595.00 USD
This product can expose you to chemicals such as lead and lead compounds, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
For a complete list of chemicals known to cause harm, visit https://www.p65warnings.ca.gov/chemicals.
Under the federal Clean Air Act (42 U.S.C. §7522(a)(3)), it is illegal to manufacture, sell, install, or use any part that defeats or alters a motor vehicle’s emission control system for use on public roads. Unless a product has received an Executive Order (EO) from the California Air Resources Board (CARB), it is not legal for use or installation on any pollution-controlled vehicle driven on public highways.
Some states have CARB-equivalent or independent emissions laws. Customers are responsible for verifying local regulations before purchasing or installing emissions-related products.
All performance, racing, or competition parts sold by this company are intended solely for off-road, closed-course, or competition use on vehicles that are never registered or used on public highways.
Kies Motorsports, LLC sells and markets these products for lawful use only. We do not condone or authorize the use of emission-control defeat devices or any modification that violates the Clean Air Act or state regulations.