Audi A4 S4 B9 2017-2023 Rear Trunk Spoiler Carbon Fiber
Available in stock (20)
Carbon Fiber Rear Trunk Spoiler for 2017-2023 Audi A4 / S4 B9 Sedan
The Audi A4/S4 B9 Sedan's long, precise trunk lid is one of the most naturally proportioned platforms for a carbon fiber trunk spoiler in the segment. This carbon fiber trunk spoiler sits at the top trailing edge of the B9's trunk lid, adding rear downforce, reducing drag, and introducing a genuine carbon fiber accent to the A4/S4's refined exterior. Tape-on installation with no drilling or modification required.
Key Features
- A4 / S4 B9-Specific Fitment: CNC-moulded and real-car tested for the 2017–2023 Audi A4 / S4 B9 Sedan — follows the B9's factory trunk lid curvature for seamless OEM-style fitment across all B9 production years.
- Genuine Carbon Fiber Construction: Real pure carbon fiber with polished, high-gloss UV-protective clear coat — lightweight, durable, and a finish that adds a premium carbon detail to the A4/S4's exterior character.
- Glue Tape Installation: High-strength adhesive tape included — installs in approximately 15 minutes with no drilling, no special tools, and no modification to factory trunk lid.
- Aerodynamic Benefit: Adds rear downforce, detaches airflow at the trunk trailing edge, and improves high-speed stability.
- UV-Resistant High-Gloss Finish: UV-protective clear coat locks in carbon gloss and resists fading and yellowing over time.
- Export-Grade Packaging: Multi-layer shockproof export carton ensures safe delivery across international shipping routes.
Product Specifications
| Feature | Details |
|---|---|
| Material | Real Carbon Fiber |
| Finish | High-Gloss UV-Protected Clear Coat |
| Fitment | 2017–2023 Audi A4 / S4 B9 Sedan |
| Installation | Adhesive Tape Included, No Drilling, ~15 min |
| Aerodynamic Benefit | Rear Downforce + Airflow Detachment |
| Weight | ~1,000 g |
Note: Fits 2017–2023 Audi A4 and S4 (B9) sedan models. Please contact us to confirm compatibility and send us photos before placing your order.
Add a carbon fiber trailing edge to your A4/S4 B9's trunk lid — add to cart now.
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Stephanie L.
Ordered the BMW front bumper fog light grille and the fitment was absolutely perfect. Gloss black finish looks factory-fresh and the quality is outstanding. Installation took about 30 minutes — no drilling required. Highly recommend AlchemyRide!
Marcus R.
Fast shipping, great packaging, and the part arrived in perfect condition. The grille fits my F23 like a glove — exactly as described. Customer service was also super responsive when I had a fitment question. Will definitely order again.
David K.
I've bought aftermarket parts from many stores but AlchemyRide stands out for quality and value. The part was well-made, fit perfectly, and the price was very competitive. My BMW looks aggressive and clean — exactly what I wanted.
Jenny T.
Excellent product and super easy to install. The gloss black finish matches my M Sport bumpers perfectly. Shipping was faster than expected and the part was well-packaged. Very happy with my purchase — my car looks completely transformed!