Carbon Fiber Rear Bumper Replacement Diffuser Valance by Scopione for Audi 2017-2019 A4 B9 – 8W – Avants & Saloons
Take your Audi A4 B9 (2017–2019) to the next level with the Scopione Carbon Fiber Rear Bumper Diffuser—designed to enhance rear-end styling, improve airflow, and deliver that aggressive S4-style carbon fiber look. Precision-engineered for perfect OEM-style fitment, this lightweight diffuser offers the ultimate blend of performance and appearance.
Key Features:
- Real Carbon Fiber Construction – Crafted from high-grade lightweight carbon fiber with a glossy UV-resistant finish that withstands heat, weather, and road wear.
- Aggressive Styling & Aerodynamics – Designed to improve airflow under the car while giving your Audi A4 B9 rear bumper a more dynamic, race-inspired look.
- S-Line & S4-Inspired Fitment – Compatible with Audi A4 B9 (8W5, 8WD) and other B9 models (8W2, 8WC), including sedan and Avant. Dual exhaust outlet design matches sporty factory aesthetics or aftermarket setups.
- Easy Installation – Direct replacement for factory rear diffuser—no cutting or major modification required. Mounts using OEM tabs and fasteners.
- Scopione Signature Quality – Engineered with Scopione’s commitment to premium exterior styling, fitment precision, and durable construction.
Replacement Diffuser Valance Fits Models Below – This Will Replace Original Diffuser ONLY
- Audi A4 B9 8W: 2017, 2018, 2019 – Please make sure your OEM Diffuser as shown in the Images
Why Choose Our A4 B9 Carbon Fiber Diffuser?
Whether you’re going for a subtle exterior upgrade or building a full Audi A4 B9 carbon fiber body kit, the Scopione carbon fiber rear diffuser is the perfect finishing touch. Get show-car looks with street-ready durability and precision fitment trusted by Audi enthusiasts worldwide.
Installation:
- Parts are hand made to replace Factory Diffuser
- No modifications are needed
- Professional Installation is advised
- Parts are designed specifically for your make and model
- Secured in place with place holders/clips
Scopione Package Contents:
- ( 1 ) One Packaging Box
- ( 1 ) Replacement Rear Diffuser
- ( 0 ) Installation Manual, Tools or Hardware are NOT Included
Enhance your Audi A4’s rear bumper today with this high-quality carbon fiber diffuser – the ultimate blend of performance, protection, and aesthetics for your machine. Give your Audi the aggressive look it deserves – choose Scopione for performance, precision, and premium style.
**Note: if for any reason you decide over time that you want to remove Scopione part(s), the process can be reversed.
Interchange Part Numbers for RHD and LHD models: 8W0.807.521.A, 8W0807521A, 8W0807521A9B9
Jason L. –
Scopione’s Diffuser Made My Audi A4 B9 Look Like a Different Car – After adding the Scopione carbon fiber rear diffuser to my 2017 Audi A4 B9 S-Line, the entire rear end looks sharper and more aggressive. The diffuser completely changes the vibe from stock to sporty. The fitment was precise, lining up with all OEM mounting points, and I didn’t need to modify anything.
The carbon fiber quality is top-notch—deep gloss, tight weave, and it matches perfectly with my other carbon accents. If you’re looking for a dual exhaust carbon fiber upgrade that’s functional and stunning, this is the one. Scopione really delivered a high-end product that transforms the car visually and aerodynamically.
Michael D. –
Best Carbon Fiber Exterior Mod for the B9 A4 – Out of all the carbon fiber exterior parts for the Audi A4 B9, this rear diffuser is the most impactful. It’s lightweight, looks amazing, and fits bumpers with zero hassle. Scopione nailed the design and finish.
Kevin R. –
Transforms the Rear View in Minutes – Install took less than 30 minutes, and the transformation was huge. The Scopione carbon fiber rear diffuser gave my 2018 Audi A4 B9 a bold, aggressive finish that finally matches the rest of my build.
Luis M. –
Excellent Quality, Real Carbon, No Gimmicks – Unlike other brands, Scopione uses real carbon fiber, not overlay junk. This Audi A4 B9 diffuser feels solid and looks incredible installed. You get high-end style and functionality with perfect OEM compatibility.
Trevor G. –
Excellent Upgrade That Blends Performance and Style – I’ve been modifying my 2018 Audi A4 B9 2.0T Quattro, and this Scopione rear bumper diffuser has been the best exterior mod so far. The carbon fiber is real—not overlay—and it’s lightweight, durable, and perfectly molded. You can tell this is made by a brand that cares about fit and finish. The dual outlet design worked great with my aftermarket exhaust. I’ve noticed cleaner lines and a rear profile that finally looks as performance-focused as the rest of the car. Scopione gets 5 stars from me.
Dylan V. –
Made My A4 Look Like an S4 – The Scopione rear diffuser gave my 2019 A4 B9 that S4 carbon rear valance look without the price tag of a full conversion. It lines up perfectly and brings the rear bumper to life. Super happy with the upgrade.
Isaiah K. –
Track-Ready Look, Street-Ready Fitment – this Audi A4 B9 carbon fiber diffuser added a race-inspired finish to the rear of my 2017 A4. I didn’t have to drill anything—it just clipped into the stock tabs. Lightweight, clean, and fits like a glove.
Brandon T. –
Truly OEM+ Quality – Worth Every Dollar
This carbon fiber rear diffuser for Audi A4 B9 is easily one of the best investments I’ve made in my car. The install was smooth—it snapped right into place using the original mounting points. What I love most is how the design enhances the stock rear bumper without overdoing it.
The Scopione diffuser has that aggressive edge I wanted while keeping everything clean and balanced. It feels like something Audi could have offered as part of a factory sport package. You get the S4-style diffuser look with premium aftermarket quality.
Gabriel C. –
Looks Amazing, Fits Even Better
The hardest part of customizing my 2019 Audi A4 B9 S-Line has been finding parts that actually fit. This Scopione carbon fiber diffuser fit perfectly right out of the box. No gaps, no drilling, and it aligned beautifully with the dual exhaust cutouts.
The finish is deep and glossy, and it really ties the whole rear end together with my side skirts and spoiler. If you’re building a clean, carbon-themed exterior, this piece is essential. Bonus: Scopione shipped fast and packed it extremely well.
Jared P. –
Aggressive Look Without Losing OEM Fitment – The Scopione carbon fiber rear diffuser completely changed the rear-end look of my 2018 Audi A4 B9. The fitment was spot-on—no trimming or gaps—and the gloss carbon finish perfectly matched my other carbon accents. It looks like it came from the factory!
Troy S. –
Perfect Carbon Upgrade for Audi A4 B9 – I’ve been slowly customizing my 2017 Audi A4 B9 2.0T, and this Scopione rear diffuser gave me the S4-style rear end I’ve always wanted. The dual exhaust cutouts line up perfectly, and it really adds a sportier, more aggressive look. Total game-changer.
Adrian N. –
Premium Carbon Fiber and Real Performance Styling – This isn’t just for looks. The Scopione Audi A4 B9 carbon fiber rear diffuser actually improved airflow and made my rear bumper feel more complete. The carbon is real, lightweight, and holds up great under weather and heat. Highly recommend it for any B9 owner looking to elevate their build.
Cody H. –
Scopione Delivers Yet Again – 10/10 – I’ve bought carbon parts from Scopione before and this rear bumper diffuser for the Audi B9 is top-tier like everything else they make. The carbon fiber weave is flawless, installation was easy, and the dual outlet design makes it perfect for performance exhaust setups.
Shane W. –
Subtle But Aggressive – A Must for Any A4 B9 Build – I didn’t want anything too flashy, just a clean and performance-oriented diffuser for my 2019 Audi A4 B9. The Scopione rear carbon fiber diffuser was exactly what I was looking for. It adds depth to the rear bumper, works with the factory exhaust, and provides a subtle yet aggressive upgrade. It’s also incredibly light and made from real carbon—not fake wrap or ABS plastic. The install was easy, and the diffuser lines up with the OEM bumper flawlessly. Highly recommend it to anyone doing a B9 S-Line style exterior customization.