K2 Industries
2008–2012 Audi A4 S-Line / S4 B8 Sedan Rear Bumper Lip with Integrated Brake Light – Carbon Fiber
Check fitment before ordering
Match the year, make, model, trim and engine in the product details. Review mounting requirements and vehicle modifications. Ask us about this part.
2008–2012 Audi A4 S-Line / S4 B8 Sedan Rear Bumper Lip with Integrated Brake Light – Carbon Fiber
Complete the rear-end styling of your Audi A4 B8 S-Line or S4 Sedan with this carbon fiber rear bumper lip featuring an integrated brake light. Spanning 142.7 cm across the lower bumper, it adds a wider, more aggressive lower rear appearance while incorporating a functional brake light for added rear visibility.
Build
- Material: Genuine carbon fiber, autoclave cured using a 3D design and CNC moulding process for precise lip 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 surface degradation through sustained outdoor and driving use
- Integrated brake light: Built-in brake light combines the visual upgrade with added rear visibility
- Panel width & weight: 142.7 cm across · approximately 1.25 kg
Design & Function
- Aggressive stance: Lip profile adds width and visual weight to the lower rear for a more planted, track-inspired rear end
- Integrated brake light: Adds a functional lighting element to the rear bumper alongside the styling upgrade
- Carbon aesthetic: Directional weave and gloss finish complement the sporty S-Line and S4 bodywork for a coordinated, motorsport-grade look
Fitment
- 2008–2012 Audi A4 S-Line B8 Sedan (4-door)
- 2008–2012 Audi S4 B8 Sedan (4-door)
- Fits the A4 S-Line and S4 factory rear bumper only — not compatible with the standard non-S-Line A4 or aftermarket bumper configurations
- Body style: Sedan only — not confirmed for Avant or Allroad body styles
Package Contents
- 1 × carbon fiber rear bumper lip with integrated brake light
- Adhesive tape for installation
- Mounting screws for installation
Installation
- Two mounting options: Fit with the included adhesive tape for a cleaner finish, or with the included screws for a more permanent, secure fitment
- Electrical connection required: The integrated brake light must be wired into the car's lighting
Your vehicle
Select a vehicle to check the supplied application records for this part.
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Manufacturer & part identification
K2 Industries
| Option | SKU / part reference |
|---|---|
| Standard | 1700004678928 |
Vehicle compatibility
Read the application years, model, trim, engine and exclusions in the description above. A make-level collection or product recommendation alone does not confirm fitment.
Request fitment help →Installation & specifications
Review the manufacturer’s specifications and installation notes above. Confirm required mounting hardware, tools and modifications before ordering. If instructions are not supplied, contact us with the part reference.
Shipping expectations
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Shipping & delivery informationManufacturer warranty
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Warranty information