Valved Catback Exhaust for Audi S4 (B8) (2009–2012)

This valved catback exhaust system allows you to switch anytime between quiet OEM-style comfort and a louder, more aggressive performance tone. Built from high-grade 304 stainless steel with precision TIG welding, it provides excellent durability, corrosion resistance, and a clean premium finish. The system is fully bolt-on — no cutting or welding required — making installation simple for most exhaust shops. Designed specifically for the 3.0T supercharged V6, it enhances exhaust flow and throttle response, producing a deeper and sportier sound compared to the factory system when the valve is open.

Fitment: Compatible with Audi S4 (B8 Platform, 2009–2012), sedan and Avant. Fitment can be confirmed with VIN or a rear exhaust photo if needed.

What’s Included:

Mid-pipe + rear valved catback system

Mounting hardware and clamps

Wireless valve controller or OEM-style valve integration (depending on setup)

Sound Characteristics:

Cold Start: deeper and more noticeable tone

Valve Open: loud, sporty, and performance-focused exhaust note

Valve Closed: close to OEM comfort for daily driving and late-night use

Shipping: Ships directly from our partner factory. Estimated delivery: 2–5 weeks.

Warranty: If the product arrives damaged or defective, replacement parts will be provided.