Audi A5 S-Line / S5 B9 Sportback 4-Door Carbon Fiber Side Skirt Extensions 2017 - 2019

2017–2019 Audi A5 S-Line / S5 B9 Sportback Side Skirt Extensions – Carbon Fiber

Enhance the lower body stance and side profile of your Audi A5 S-Line or S5 B9 Sportback with these carbon fiber side skirt extensions. Finished in a high-polish gloss black 3K twill weave and running the full length of the lower body, they add visual width for a more planted, aggressive side profile that complements the factory B9 Sportback body lines.

Build

• Material: Genuine carbon fiber in a 3K twill weave, vacuum moulded using a 3D design and CNC moulding process — lightweight, strong, and visually striking with an authentic weave surface that carbon-look ABS and painted alternatives cannot replicate
• Surface finish: High-polish gloss black finish that showcases the natural 3K twill weave with strong UV and moisture resistance through long-term outdoor and driving exposure
• Configuration: Supplied as a handed pair (left and right) for a symmetrical installation
• Panel length: 185 cm per side for full-length lower body coverage

Design & Finish

• Aggressive stance: Extension profile visually widens and lowers the side profile for a more planted, ground-hugging look
• Full-length coverage: The 185 cm panel spans the complete lower body for an integrated finish with no factory door sill areas left exposed
• Carbon aesthetic: 3K twill weave and gloss black finish complement the factory B9 Sportback body lines for a coordinated, motorsport-grade look

Fitment

• 2017–2019 Audi A5 S-Line B9 Sportback (4-door)
• 2017–2019 Audi S5 B9 Sportback (4-door)
• Fits the factory door sills only — not compatible with aftermarket side skirt configurations
• Body style: Sportback (4-door) only — does not fit Coupe, Sedan, or Cabriolet body configurations

Package Contents

• 2 × carbon fiber side skirt extensions (left and right)
• Pre-applied adhesive tape for installation

Installation

• No-drill, adhesive-mounted: Installs with the included adhesive tape — no drilling and no permanent modification to the factory door sills
• Surface prep: Thoroughly clean, degrease, and dry the lower door sill surface before fitting to ensure maximum adhesion
• Check orientation: The panels are handed — confirm correct left and right sides before final adhesion
• Professional installation strongly recommended — panels of this length require careful positioning to achieve symmetrical alignment and a clean finish along the full run

Before You Install

• Confirm your car is an A5 S-Line or S5 B9 Sportback (2017–2019) before ordering — this will not fit the Coupe, Sedan, or Cabriolet
• Dry-fit both panels first — at 185 cm, any difference in height or fore-aft position between sides is immediately visible along the car
• Work in moderate temperatures and allow the adhesive to cure fully before washing the car
• Side skirts sit low and are exposed to kerbs and driveway ramps — take care when parking