Audi S4 rear diffusers

4 rear diffusers for the B9 Audi S4 (3.0T V6) from 3 brands. Rear diffusers and rear bumper trim.

Before you order

Diffusers are specific to the bumper type and to the exhaust tip layout. Confirm both.
Listings are read from the retailer's B9 S4 (3.0T, quattro) category. Confirm engine, drivetrain and model year on the retailer page before ordering.

Brands on this page: ECS (2), Doorbusters (1), Enthusiast Bundles (1).

Doorbusters · Part no. DO0RBUSTER12KT
Audi B9 S4 Pre-facelift Rear Diffuser & Trunk Spoiler
Add some aggressive styling to your Audi!
Retailer fitment note: Fits pre-facelift models (up to 2019) without integrated tips in the rear valance
Check price at ECS Tuning for Doorbusters Audi B9 S4 Pre-facelift Rear Diffuser & Trunk Spoiler (opens the retailer site)
ECS · Part no. 023797ECS01
Audi B9 S4 Carbon Fiber Rear Diffuser
Hand-laid carbon fiber to upgrade your exterior styling
Retailer fitment note: Fits pre-facelift models (up to 2019) without integrated tips in the rear valance
Check price at ECS Tuning for ECS Audi B9 S4 Carbon Fiber Rear Diffuser (opens the retailer site)
ECS · Part no. 006077LA01
Audi B9 S4 Rear Diffuser - Gloss Black
Add some aggressive styling to your Audi!
Retailer fitment note: Fits pre-facelift models (up to 2019) without integrated tips in the rear valance
Check price at ECS Tuning for ECS Audi B9 S4 Rear Diffuser - Gloss Black (opens the retailer site)
Enthusiast Bundles · Part no. 028801ECS01EBKT
Audi B9 S4 Pre-facelift Rear Diffuser & Trunk Spoiler
Add some aggressive styling to your Audi!
Retailer fitment note: Fits pre-facelift models (up to 2019) without integrated tips in the rear valance
Check price at ECS Tuning for Enthusiast Bundles Audi B9 S4 Pre-facelift Rear Diffuser & Trunk Spoiler (opens the retailer site)