KB Style Carbon Fiber Rear Diffuser - Audi A3 & S3 8V
Revitalize the rear end of your Audi A3, and S3 Carbon Fiber Rear Diffuser. Crafted with precision and inspired by the track, this aerodynamic accessory seamlessly blends aggressive style with high-performance design, creating a visual masterpiece for your vehicle.
Tailored specifically for the A3, S3, models, the KB Style Carbon Fiber Rear Diffuser ensures a perfect fit that accentuates the sporty contours of your Audi. The lightweight carbon fiber construction not only enhances the aesthetics but also contributes to the overall aerodynamics, promising a driving experience that is as thrilling as it is stylish.
Upgrade your Audi's rear profile with the distinctive KB Style Carbon Fiber Rear Diffuser, where every curve and detail speaks to the pursuit of automotive excellence. Turn heads on the road as you make a bold statement of style and performance. Elevate your driving experience with the perfect fusion of form and function.
Fitment: Audi A3 S3 17-20
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
Carbon Fiber GT Style Rear Wing - TOYOTA GR86 Subaru BRZ ZN8 ZD8
Extremely good quality 10/10, came fast and amazing customer support
I returned it bc I bought the wrong ones. Not their fault tho I could tell it was good quality
The carbon fiber rear spoiler was very well protected in the packaging and the shipping process was very fast.
BMW M Crystal Push Start Button Upgrade - BMW G Chassis G20/ G80 / G22/ G82 / G87 2020-2024
It give an another look at the car interior,elegant and sporty
Carbon Fiber Rear Trunk Swan neck Wing - 2023+ Honda Civic Gen 11 FL5 Type R
will this fit a 2012 camry?
Great quality & Fit!
This was a must after I lowered the car. Easy to do and fitment was spot on.
Was a perfect fit for my 500. You will have to drill holes in the lip (there are little indentations on it) and car, but after lining it up and making sure it’ll look right it was a VERY easy process. I had a bit of trouble at first and dm’ed the company on instagram and they responded quickly as well, so the customer service was A1. Took a chance with this since I saw them on a fb ad and they did not disappoint.
Good quality and everything fits like its suppose to.
Yes I would recommend this carbon trunk very good fitment and amazing look!
This is a follow-up to my first review. It was my first car show entry ever. 300+ entries. My M4 got Best in Class! Thanks, CB!!!
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FAQ
Will these parts fit my specific BMW 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 Irvine, CA location. You caninquire here.
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)
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