3D Design G90 / G99 M5 Carbon Fiber Rear Diffuser
3D Design G90 / G99 M5 Carbon Fiber Rear Diffuser is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Once an order is received for an item and funds have cleared, you can expect your item to ship from our warehouse within 1-2 business days for most of the items we sell. Items will be packaged safely and correctly to prevent any type of damage that can occur during the shipping process. Once your item has been shipped you will receive a confirmation notification of your incoming package including all tracking information. Our packages will be shipped via USPS or UPS Ground or FedEx. For larger items we require them be shipped via UPS Ground or FedEx.
*** Due to the nature of some of the items we sell, some items will take longer to fulfill and deliver. No need to worry, we will let you know if your particular item will take a little more time. This includes orders such as (WHEELS, BODY KITS, and SPECIAL ORDERS, ETC.) which usually take longer than 3-5 days to fulfill. We know how frustrating it is to sit and wait for items, so will be giving you detailed updates along the way until your order has left our warehouse.
***ALL ITEMS WILL BE CHECKED FOR FLAWS AND OR MANUFACTURER DEFECTS BEFORE PACKAGING TAKES PLACE FOR QUALITY CONTROL OF THE ITEMS WE SELL.***
Description
Description
3D Design G90 / G99 M5 Carbon Fiber Rear Diffuser
Part # 3108-39012
3D Design has firmly established itself as one of the most respected names in the BMW tuning world. Known for delivering some of the highest-quality aero and styling packages for previous-generation M5 platforms, that same level of craftsmanship and engineering carries over seamlessly to the latest G90 M5 Sedan and G99 M5 Touring.
The new 3D Design full carbon fiber rear diffuser is constructed from premium pre-preg 2×2 twill carbon fiber and truly sets itself apart from the rest of the market. Designed with clean OEM+ body lines, the diffuser enhances the rear of the M5 with a more aggressive presence while preserving the factory design language. Installation is equally well thought out, utilizing factory-style mounting clips and including a full carbon fiber replacement tow hook cover for a complete, no-compromise finish.
The diffuser’s side fin design flows naturally with BMW’s rear bumper contours and aligns perfectly with the winged 3D Design side skirts, creating a cohesive and unified aero package from front to rear. As expected from 3D Design, fitment, surface quality, and overall execution are exceptional.
Who Is 3D Design
Founded in 1998 by three BMW-focused designers with genuine motorsport backgrounds, 3D Design was built on a clear philosophy: create BMW parts they would personally use themselves. From circuit to street, every product is developed with the end user in mind. In 2006, the leadership team expanded to include industry veterans with over a decade of experience in product development and marketing, while maintaining the brand’s original mission and attention to detail.
What Makes 3D Design Different
3D Design does not chase volume or trend-driven styling. Instead, they focus on surface development, precise fitment, and how each component integrates into the overall driving experience. While digital tools assist in development, final designs are refined through traditional hand modeling, allowing subtle shapes and transitions to be perfected beyond what simulations alone can capture. The result is aerodynamic components that integrate like OEM, exhaust systems with balanced sound and flow, and chassis parts that feel purposeful rather than overstated.
Product Details
Premium pre-preg carbon fiber construction
2×2 twill weave
High-gloss finish
Designed and manufactured in Japan
Factory-style mounting clips
Includes carbon fiber tow hook cover
Fitment: BMW G90 M5 Sedan and BMW G99 M5 Touring
Return Policy
Return Policy
RETURNS
- Returns are accepted within 30 days after confirmed delivery of the item.
- There will be a 20% restocking fee assessed for all items returned. Restocking fee may be waived depending on a case by case situation. If there are any more questions or concerns, please contact us immediately for more info on restocking fees.
- If you would like to return an item please contact us as soon as possible, and after approval of a return we will give you instructions on how to complete the return.
- ***ALL RETURNED ITEMS MUST BE IN BRAND NEW CONDITION.
- The buyer is responsible for all return shipping fees unless previously discussed with our sales team.
- After the returned item has been received we will check the item to verify and once approved you can expect your refund within 3-5 business days or sooner.
- ALL RETURNS ARE ONLY ACCEPTED IF ITEMS HAVE NOT BEEN INSTALLED ON THE VEHICLE, ALTERED, TAMPERED AND OR DAMAGED BY INSTALLING PARTY. *** PLEASE CHECK ITEMS THOROUGHLY BEFORE INSTALL!
- Special ordered items that have been shipped are NOT ELIGIBLE FOR RETURN! Please contact us before purchasing for more information.
ORDER CANCELLATIONS
- You may cancel your order before it has been processed and shipped out and receive a full refund.
- If you would like to cancel an order after the item(s) have been shipped out your item is subject to the 20% restocking fee.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.



