Carbon Fiber Rear Bumper Side Splitters for Audi A5 S Line / S5 B9

Add a more defined rear-corner profile to your Audi with these carbon fiber rear bumper side splitters. Designed for compatible 2017–2019 Audi A5 S Line and S5 B9 rear bumpers, this left-and-right pair combines a horizontal splitter section with an integrated vertical fin at each outer corner.

Unlike a full-width rear diffuser, these pieces install at the lower outer sections of the rear bumper, making them a separate rear-corner styling component rather than a replacement for the center diffuser.

Vehicle Fitment

• 2017–2019 Audi A5 B9 with S Line rear bumper
• 2017–2019 Audi S5 B9

Designed for compatible S Line / S5 rear bumper configurations. Not intended for standard A5 Base rear bumpers, RS5 applications, B8 / B8.5 models or B9.5 facelift rear bumpers unless specifically confirmed.

Body-style compatibility can vary by rear bumper configuration. Please confirm your exact year, model, trim and rear bumper shape before ordering.

Product Details

• Product Type: Rear Bumper Side Splitters
• Configuration: 2-piece left and right pair
• Design: Integrated vertical outer fins
• Material: Carbon Fiber
• Finish: Gloss carbon fiber finish
• Approx. Size: 31.7 cm × 13.8 cm per side
• Installation: Mechanical / screw-mounted installation

2-Piece Rear Corner Design

Each side splitter follows the lower rear bumper corner and incorporates a raised vertical fin at the outer edge. The paired design creates a more pronounced rear-corner appearance while remaining visually separate from the vehicle's center rear diffuser.

This structure also distinguishes these Audi A5 S Line / S5 B9 rear splitters from flat rear bumper extensions, full-width diffusers and generic universal canards.

Gloss Carbon Fiber Finish

The exposed woven carbon fiber surface is finished in gloss, highlighting the molded contours, raised outer fins and sculpted edges of each splitter.

The supplied pieces include mounting points for mechanical installation. Test-fit both sides and confirm alignment with the rear bumper before final fastening. Professional installation is recommended for proper positioning and secure mounting.

Rear Splitters vs. Rear Diffuser

These parts are designed for the left and right outer sections of the rear bumper and should not be confused with a full rear bumper diffuser. If you are replacing the center lower diffuser section, confirm that you are selecting the correct rear diffuser product instead.

Fitment Confirmation

If you are unsure whether your Audi has the correct rear bumper, send us your vehicle year, model, trim and clear photos of the rear bumper before ordering so our team can help confirm compatibility.

Explore more model-specific exterior upgrades in our 2017–2019 Audi A5 / S5 B9 carbon fiber parts collection.