


Prepreg Carbon Fiber PT Style Rear Diffuser - BMW G8x M3 G80 M4 G82 G83
Elevate the rear aesthetics and aerodynamics of your BMW G80 M3, G82, or G83 M4 with the Prepreg Carbon Fiber PT Style Rear Diffuser. This high-performance rear diffuser is designed to enhance your vehicle’s stability and airflow while giving your car a more aggressive, motorsport-inspired look. Made from premium prepreg carbon fiber, this diffuser offers the perfect combination of lightweight construction, superior durability, and high-end aesthetics, making it the ideal upgrade for any enthusiast looking to improve both performance and styling.
Key Features:
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Premium Prepreg Carbon Fiber Construction: The rear diffuser is made from top-tier prepreg carbon fiber, known for its superior strength and lightweight properties. This material ensures maximum durability and a sleek, glossy finish, making it both a performance and visual upgrade.
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Aggressive PT Style Design: The PT style diffuser features bold, sharp lines and a sleek design that enhances the aggressive rear styling of your BMW G80 M3, G82, or G83 M4. Its motorsport-inspired look gives your vehicle a more track-ready, dynamic appearance.
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Enhanced Aerodynamics and Downforce: The rear diffuser helps optimize airflow under the vehicle, reducing drag and increasing downforce. This results in improved stability, traction, and grip, especially during high-speed driving or aggressive cornering, making it perfect for both street and track use.
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Lightweight Performance Upgrade: Prepreg carbon fiber ensures that the diffuser is lightweight, reducing the overall weight of your vehicle while maintaining durability. The weight reduction translates into improved handling and agility, further enhancing the performance of your M-Series BMW.
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Perfect Fitment for G80 M3 & G82/G83 M4: Designed specifically for the BMW G80 M3, G82, and G83 M4, this rear diffuser ensures a perfect, seamless fit. It integrates perfectly with your car’s rear bumper, requiring minimal modifications for installation.
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UV-Resistant Clear Coat: The carbon fiber is coated with a UV-resistant clear coat to protect it from fading, discoloration, or yellowing over time. This ensures your rear diffuser retains its high-gloss finish and fresh look for years, even with exposure to the sun.
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Improved Handling and Stability: By improving airflow and reducing lift, this rear diffuser contributes to a more stable driving experience, especially at high speeds or on the track. The increased downforce results in better rear-wheel grip, giving you better control during cornering and high-performance driving.
Upgrade your BMW G80 M3, G82, or G83 M4 with the Prepreg Carbon Fiber PT Style Rear Diffuser. Combining lightweight construction, superior aerodynamics, and aggressive styling, this rear diffuser is the perfect choice for enthusiasts who want to improve both the performance and look of their M-Series BMW.
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)