Audi S5/A5 B9/B9.5 Prepreg Dry Carbon Fiber Side Skirt

Designed for Audi S5/A5 B9 and B9.5 owners, this Prepreg Dry Carbon Fiber Side Skirt set adds a lowered, sporting profile and premium carbon character to your car's side view. Manufactured in Europe and quality-controlled by BYC Performance, this Audi S5/A5 carbon side skirt mounts directly to OEM rocker panel lines on both B9 pre-facelift and B9.5 facelift coupés, sportbacks, and cabriolets.

If you're building an Audi A5/S5 B9 tuning project and want a track-grade side profile upgrade, this dry carbon side skirt set is for you. Autoclave-cured prepreg carbon is noticeably lighter than wet-lay carbon, with superior strength and excellent UV resistance. Complements the S5 B9/B9.5's 3.0 TFSI V6 single-turbo (349-354 hp) and the A5's 2.0 TFSI EA888 four-cylinder character with aggressive side-profile emphasis.

Key Features

• Prepreg Dry Carbon Technology: Pre-impregnated plies cured in an autoclave under high heat and pressure — homogeneous resin, a consistent weave.
• Lowered Sporting Profile: Adds a low-ground-effect feel to the side view and aggressive stance.
• High Strength: Carbon fiber offers very high strength for its weight; resists stone chips and road debris.
• Aerodynamic Edge Line: Guides side airflow toward the underbody and reduces local turbulence.
• 2x2 Twill Carbon Weave: Authentic carbon pattern under a high-gloss UV-protective clear coat.
• B9 + B9.5 Dual Fit: Mounts to Audi A5/S5 B9 (2016-2019) and B9.5 (2019-2024) OEM rocker lines.
• UV & Chemical Protection: Long-life clear coat resists fading, cracking, and road grime.

Prepreg Dry Carbon vs. Wet Carbon — Which Is Better?

Most aftermarket carbon parts use wet lay-up, where resin is applied by hand and cured at room temperature — which can leave air voids and inconsistent weight. Prepreg dry carbon:

• Cured in an autoclave under high heat and pressure → a more consistent weave
• Made with a controlled resin ratio → lighter and stronger
• The production method widely chosen in motorsport
• Minimal UV fading over years of use

Vehicle Fitment

This Audi S5/A5 B9/B9.5 side skirt set (left + right) fits:

• Audi A5 Coupé B9 (2016-2019) and B9.5 (2019-2024) — 2.0 TFSI / 2.0 TDI
• Audi A5 Sportback B9/B9.5 (2016-2024)
• Audi A5 Cabriolet B9/B9.5 (2017-2024)
• Audi S5 Coupé B9/B9.5 (2016-2024) — 3.0 TFSI V6
• Audi S5 Sportback B9/B9.5 (2016-2024) — 3.0 TFSI V6
• Audi S5 Cabriolet B9/B9.5 (2017-2024) — 3.0 TFSI V6

Important notes:

• NOT compatible with RS5 B9/B9.5. RS5's side skirt geometry is wider and more aggressive.
• NOT compatible with previous-generation B8/B8.5 A5/S5 (2008-2015).

Technical Specifications

• Material: Prepreg Carbon Fiber (2x2 Twill Weave)
• Manufacturing: Autoclave Cure
• Finish: High-Gloss Clear UV-Protective Resin
• Color: Natural carbon weave black
• Quantity: 2 pieces (left + right)
• Origin: Europe

Installation Notes

Designed to mount directly under the OEM rocker panel covers. Professional installation is recommended:

1. Degrease the rocker surface with isopropyl alcohol.
2. Test-fit the left and right pieces for alignment.
3. Apply 3M VHB double-sided tape and press firmly.
4. Torque any supplied fasteners to the manufacturer's recommended values if applicable.
5. Do not wash for the first 24 hours; install at 20°C+ ambient.

Care & Maintenance

Wash with pH-neutral car shampoo. Apply carbon-safe sealant every 6 months. Keep pressure washer nozzle at least 30 cm from surface.

FAQ

Compatible with both B9 and B9.5?
Yes. Both generations share the same rocker line; this set fits directly.

Compatible with RS5 B9/B9.5?
No. RS5 side skirt geometry is wider and more aggressive.

Compatible with Coupé, Sportback, and Cabriolet?
Yes — all three body styles share the same rocker line.

Compatible with previous B8/B8.5 A5?
No. B8/B8.5 (2008-2015) uses different chassis geometry.

Will rain damage dry carbon parts?
No. Autoclave-cured prepreg carbon is fully waterproof and weather-resistant.

Shipping time?
In-stock items ship within 1-3 business days. International shipping available.

Warranty?
BYC Performance offers a 12-month manufacturer warranty.

Why BYC Performance?

BYC Performance is a Turkey-based performance tuning specialist sourcing premium carbon fiber parts from leading European manufacturers. Our catalog includes Audi S5/A5 carbon side skirts, Audi RS carbon parts, BMW M carbon side skirts, Porsche carbon parts, and more. All parts are sourced from leading European manufacturers and undergo strict quality control.