Vendor:K2 Industries

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

Sale price$869.99 USDRegular price $955.00 USD
In stock, ready to ship

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

Enhance the side profile and lower body stance of your Audi A5 or S5 B9 with these carbon fiber side skirt extensions. Molded for the factory door sills, they add visual width and a more planted lower body stance while introducing a premium carbon exterior detail to the B9 platform.

Build

  • Material: Genuine carbon fiber, autoclave cured using a 3D design and CNC moulding process for precise skirt geometry, consistent panel quality, and an authentic weave appearance over carbon-look ABS or fiberglass alternatives
  • Surface finish: High-gloss epoxy-polished and UV-protected finish that showcases the natural carbon weave and resists UV exposure, moisture, and road debris through sustained outdoor and driving use
  • Configuration: Supplied as a handed pair (left and right) for a symmetrical installation

Design & Finish

  • Aggressive stance: Extension profile visually widens and lowers the side profile for a more planted, ground-hugging look
  • Carbon aesthetic: Directional weave and gloss finish complement the factory B9 body lines for a coordinated, motorsport-grade look
  • Factory-style integration: Precision-molded to follow the contours of the factory door sills for clean panel gaps and consistent alignment

Fitment

  • 2017–2019 Audi A5 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: 4-door only — does not fit the 2-door Coupe or Cabriolet

Package Contents

  • 2 × carbon fiber side skirt extensions (left and right)
  • Installation hardware

Installation

  • Surface prep: Thoroughly clean and degrease the lower door sill surface before installation to ensure correct panel seating and secure fitment
  • Check orientation: The panels are handed — confirm correct left and right sides before fitting
  • Alignment: Dry-fit both panels and check height and fore-aft position match on each side before final fitting
  • Professional installation recommended for the best positioning, panel alignment, and finish quality

Before You Install

  • Confirm your car is a 4-door B9 A5 or S5 (2017–2019) before ordering — this will not fit the 2-door Coupe or Cabriolet
  • Dry-fit both panels first — any difference in height or position between sides is immediately visible along the car
  • Side skirts sit low and are exposed to kerbs and driveway ramps — take care when parking

Ships within 1-2 business days.

100% Genuine Parts

Fitment Guaranteed

Premium Parts

Fitment Guaranteed

Customers are saying

4.86 ★ (314)
Verified

FAQs

Please read our FAQs page to find out more.

Are OEM products more expensive than aftermarket alternatives?

OEM products might have a higher upfront cost compared to aftermarket parts, but their superior quality and durability often make them a more cost-effective choice over time. Investing in OEM ensures you’re getting parts specifically designed for your vehicle, which can lead to better performance and longevity.

Can I purchase OEM parts online or do I need to visit a dealership?

You don’t need to visit a dealership to get OEM parts. You can conveniently purchase genuine OEM components from authorized distributors and reputable online retailers like Turbo Tech Performance. Our online store provides a wide selection of high-quality parts delivered straight to your door.

Are parts from brands like Mopar, ACDelco, and Motorcraft interchangeable between different vehicle brands?

No, parts from Mopar, ACDelco, and Motorcraft are typically designed for specific vehicle brands. It’s crucial to ensure compatibility with your vehicle’s make and model by checking part numbers and consulting with a knowledgeable expert.

Can I install OEM parts myself, or is it better to have a professional handle it?

While some OEM parts can be installed by DIY enthusiasts, the complexity of installation can vary. For the best results and to ensure proper fitment and performance, we recommend having a trained mechanic install the parts, especially if you’re unfamiliar with automotive repairs.

Do OEM parts come with a warranty?

Yes, many OEM auto parts come with a manufacturer’s warranty that covers defects or issues. Be sure to check the warranty details for each part at the time of purchase, and keep your receipt for any potential warranty claims.

Didn’t find your answer?

Don't hestitate to contact us