Carbon Fiber Big Fin Style Diffuser - Audi A3 S3 S-Line 17-20

Carbon Fiber Big Fin Style Rear Diffuser

(Audi A3 | S3 S-Line – 8V)

Upgrade the rear-end styling of your Audi with our Big Fin Style Carbon Fiber Rear Diffuser, designed to deliver a more aggressive, motorsport-inspired appearance while maintaining a clean OEM+ look. The extended fin design adds depth and visual impact to the rear bumper, giving the vehicle a more performance-focused presence.

Constructed from high-quality carbon fiber, this diffuser offers lightweight durability and a premium finish. Finished with a UV-resistant clear coat, it is protected against fading, yellowing, and sun damage to ensure long-lasting appearance. Precision-molded design allows for proper alignment and fitment when installed correctly.

Product Features

• Big fin style rear diffuser design for aggressive styling

• Premium carbon fiber construction for lightweight durability

• UV-resistant clear coat prevents fading and discoloration

• Enhances rear-end aesthetics and sporty presence

• Precision-molded for factory-style fitment

Fitment

• Audi A3 S-Line (8V) — 2017–2020

• Audi S3 (8V) — 2017–2020

⚠️ Fits S-Line rear bumper models only. Will NOT fit non-S-Line bumpers.

Availability

This product is in stock and ready to ship.

Installation

Professional installation is recommended, as we do not provide installation guides or support for self-installation.

Additional mounting points may be required or existing mounting points may need to be modified for proper installation.