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.
Condition Options
- New: First-quality carbon fiber with full UV-gloss finish — no surface defects.
- New (Small Flaw): Factory second-quality unit with minor cosmetic surface imperfection (e.g., small inclusion or slight weave irregularity in clear coat). Structurally sound and fully functional — offered at a reduced price. The flaw is typically only visible on close inspection. Contact us for photos of the specific flaw before ordering.
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 |
Shipping & After-Sales
- 30-day returns on unused items
- Damaged on arrival? Free replacement or full refund within 72 hours
- Engineer support available for fitment confirmation before ordering
- 1-Year Factory Warranty & global after-sales support
Note: Fits 2017–2023 Audi A4 and S4 B9 Sedan. For the New (Small Flaw) variant, contact us for photos of the specific cosmetic imperfection before ordering. Send us photos if you need fitment confirmation.
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!