Upgrade exhaust flow and sound with this 304 Stainless Steel Valved Cat-Back Exhaust System for Audi S4 B9 2018-2024. The system replaces the exhaust section behind the catalytic converter and is designed to provide a deeper tone, reduced restriction, and a cleaner rear appearance. The integrated valve system allows the exhaust path and sound level to be adjusted when installed with the compatible controller.
Product Details:
- Fitment: Audi S4 B9 2018-2024
- Construction: T304 stainless steel
Confirm chassis code, engine, drivetrain, body style, model years, pipe routing, connection points, and rear-bumper outlet layout before ordering. Professional installation and adjustment are recommended, especially for valved systems that require wiring, vacuum lines, or controller setup.
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Parts Island is an independent reseller of this aftermarket product and is not affiliated with, sponsored by, or endorsed by Audi. References to Audi are used only to identify compatibility, application, or the design reference shown. The referenced names and related marks remain the property of their respective owners.
