


Full Dry Carbon Fiber Rear Diffuser Kit - BMW G80 M3 | G82/G83 M4
Transform the rear end of your BMW G80 M3 or G82/G83 M4 with our Full Dry Carbon Fiber Rear Diffuser Kit. Expertly engineered and crafted from high-quality dry carbon fiber, this diffuser kit not only enhances your vehicle’s aerodynamic performance but also adds a striking visual upgrade.
Key Features:
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Premium Dry Carbon Fiber Construction: Made from 100% dry carbon fiber, this rear diffuser kit offers exceptional strength, rigidity, and a lightweight profile. Dry carbon fiber is renowned for its superior performance characteristics, making it an ideal choice for high-end automotive applications.
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Aerodynamic Enhancement: The diffuser is designed to improve airflow under the vehicle, reducing drag and increasing downforce. This results in better high-speed stability and handling, enhancing your driving experience.
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Aggressive Aesthetic: The sharp, race-inspired design of the diffuser adds a commanding presence to the rear of your BMW. The intricate carbon fiber weave, combined with a glossy finish, delivers a motorsport-inspired look that complements the aggressive styling of the G80 M3 and G82/G83 M4.
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Perfect Fitment: Designed specifically for the BMW G80 M3 and G82/G83 M4, this diffuser kit fits seamlessly with your car’s rear bumper. The precise engineering ensures a factory-like fit with no modification required.
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Lightweight and Durable: Dry carbon fiber’s lightweight properties help reduce overall vehicle weight while maintaining high durability. The diffuser is resistant to impacts, ensuring long-term reliability and performance.
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Glossy UV-Protected Finish: The diffuser features a high-gloss, UV-protected coating that maintains its sleek appearance and prevents fading or discoloration over time. The finish also makes the carbon fiber weave stand out, adding an extra touch of elegance.
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Easy Installation: The kit comes with all necessary mounting hardware and installation instructions. Designed for a straightforward, bolt-on installation, it requires no permanent modifications to your vehicle.
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Enhances Exhaust Functionality: The diffuser is designed to optimize exhaust flow and reduce turbulence, which can help to enhance the performance of your vehicle’s exhaust system.
Elevate the look and performance of your BMW G80 M3 or G82/G83 M4 with the Full Dry Carbon Fiber Rear Diffuser Kit. Experience the perfect combination of advanced aerodynamics and high-end styling that sets your vehicle apart on and off the track.
We want you to have our parts as quickly as possible. Products that are in stock will be shipped and delivered domestically in 1–5 business days. It will take seven to twenty-one business days for international shipment. An email confirming that your order is being completed will be sent to you once you place it. For in-house orders, please allow a day for processing and the updating of the tracking number. The product page accurately shows the quantity.
Custom steering wheels typically take 20-25 business days for production, with an additional 5-7 business days for shipping. Production and delivery times may vary depending on the complexity of the order and the shipping destination. For more details, please refer to our Shipping Policy.
Our Return Policy permits returns only for products that are found to be defective. You have 30 days from the date of delivery to inspect the product and report any issues.
Regular Cleaning: Maintain carbon fiber parts by cleaning them regularly with a soft cloth and a mixture of mild soap and water. Avoid abrasive or harsh cleaners that could harm the finish.
Use Microfiber Pads and Cloths: Opt for microfiber pads and cloths when cleaning or applying protective coatings to prevent surface scratches.
Protect from Sun and Chemicals: Limit exposure to direct sunlight and harsh chemicals, as they can damage carbon fiber. When possible, use protective covers or park your vehicle in shaded areas.

Why Thousands of Enthusiasts Trust Us
Carbon Industries delivers premium, precision-engineered parts that elevate Vehicle performance and style—backed by expert support and a true passion for the culture. We don’t just sell parts; we fuel the lifestyle.
- Guaranteed Fitment for Your BMW: No guesswork—our parts are designed and tested to fit your exact model perfectly.
- Premium Materials, Always: We use only high-grade carbon fiber, forged metals, and performance-tested components.
- White-Glove Customer Support: Our team of BMW specialists is here to guide you with expert, concierge-level care.
- Trusted by the Elite Vehicle Community: From daily drivers to show builds, our parts are featured on some of the cleanest builds worldwide.

Let customers speak for us
FAQ
Will these parts fit my specific Vehicle model and year?
Yes — every product page includes a “Will This Fit” section to ensure compatibility. If you’re unsure, just send us your VIN or model/year, and our team will confirm fitment for you within 24 hours. We specialize in BMW and European vehicles, so you’re in good hands.
Are these genuine carbon fiber or carbon fiber overlay parts?
We offer only full carbon fiber options. Each listing clearly specifies the construction material. Rest assured, we only source high-quality parts that are durability-tested and made to OEM or better standards.
How long does shipping take and where do you ship from?
Most orders ship from our Irvine, CA warehouse within 1–3 business days. Domestic delivery typically takes 3–7 business days. International shipping times vary by country. Each product page includes real-time shipping estimates based on your location. Certain made to order products will take up to 3-4 weeksfor delivery, including production time.
Do I need professional installation or can I install it myself?
Many of our mods are designed for direct bolt-on installation and can be installed at home with basic tools. However, for certain parts like aero kits or performance components, we recommend professional installation for best results. Each product page includes install difficulty and notes. We offer professional installation at our Santa Clara, CA location.
What if the product doesn’t fit or I change my mind?
No worries — we offer hassle-free returns within 30 days of delivery. If the part doesn’t fit due to an error on our end, we’ll cover the return shipping. For all other returns, we make it easy to exchange or get a refund. See our full Returns & Warranty Policy for details.
Are your parts tested for quality and durability?
Absolutely. All of our products go through quality control checks and are either TUV-certified, ISO-certified, or tested by our in-house team and verified installers. We don’t sell anything we wouldn’t put on our own cars.
Do you offer warranties on your parts?
Yes. Most of our products come with a 90-day limited warranty against manufacturing defects. Some premium items offer extended warranties — details are listed on the product pages. We’re committed to quality and stand behind what we sell.
Can I finance or pay in installments?
Yes — we offer Shop Pay, Affirm, AfterPay, and Klarna at checkout. You can split your purchase into 4 interest-free payments or choose longer-term plans if needed. It’s quick, easy, and won’t affect your credit score (in most cases)