Audi A6 S Line / S6 C7.5 Carbon Fiber Rear Bumper Diffuser

Refresh the rear end of your 2016–2018 Audi A6 S Line / S6 C7.5 Sedan with this gloss carbon fiber rear bumper diffuser. Designed as a replacement-style rear valance upgrade, this diffuser gives the A6/S6 rear bumper a sharper, lower and more performance-inspired appearance without turning the page into a generic body kit listing.

This product is a strong fit for customers looking for an Audi A6 S Line S6 C7.5 carbon fiber rear diffuser, Audi A6 C7.5 S Line rear bumper diffuser, or Audi S6 C7.5 carbon fiber rear valance for 2016–2018 sedan models.

Fitment

Important: This rear bumper diffuser is designed for 2016–2018 Audi A6 S Line, A6 Quattro S Line and S6 C7.5 Sedan models. It is not designed for A6 Base non-S Line bumpers, A7, S7, RS6, RS7, Wagon / Avant models, or 2019+ Audi A6/S6 C8 models. Please compare your rear bumper shape and exhaust outlet layout with our product photos before ordering.

Key Features

• Designed for 2016–2018 Audi A6 S Line / S6 C7.5 Sedan models
• Replacement-style rear bumper diffuser / rear valance upgrade
• Gloss carbon fiber finish for a cleaner and sportier rear-end appearance
• 3K twill carbon fiber weave for the carbon fiber version
• Designed to follow the C7.5 rear bumper line and exhaust outlet area
• Helps create a wider, lower and more aggressive visual stance from the rear
• Not suitable for A6 Base non-S Line bumpers or 2019+ C8 models

Material & Finish

This Audi A6/S6 C7.5 rear diffuser is made with carbon fiber and finished with a gloss clear coat. The visible 3K twill weave gives the rear bumper area a premium carbon fiber appearance and pairs well with other exterior carbon fiber upgrades such as mirror covers, spoilers or side skirt extensions.

Design Details

The C7.5 A6/S6 rear bumper has a clean factory shape, but the original rear valance can look too flat for owners who want a stronger rear-end profile. This carbon fiber diffuser adds a more defined lower section around the exhaust outlet area, giving the sedan a sharper performance-style finish while keeping the design aligned with the original bumper shape.

Each diffuser is produced with dedicated molds and checked before shipping. The goal is to provide a consistent product shape, clean carbon fiber surface and a better installation experience for the rear bumper area.

Installation Notes

This is a replacement-style rear bumper diffuser. Installation may use factory mounting points or screws where applicable, depending on your rear bumper structure and local installation method. Professional installation is recommended.

• Check the diffuser and rear bumper before installation
• Test fit the diffuser before final mounting
• Confirm the exhaust outlet layout matches your vehicle
• Use factory screws or suitable mounting hardware where applicable
• Do not force the diffuser into place if the bumper shape does not match
• Professional installation is recommended for best results

Before Ordering

Please confirm your Audi model year, trim, body style and rear bumper type before ordering. This product is for A6 S Line / A6 Quattro S Line / S6 C7.5 Sedan models only. If you are unsure about fitment, please send us your vehicle year, trim and rear bumper photos through our Contact Us page.

Explore More Audi A6/S6 Upgrades

Looking for more matching exterior upgrades? Browse the Audi A6/S6 carbon fiber parts collection, explore more Audi carbon fiber parts, or return to AHACARBON.