Audi B9 S4,S5 3.0L Catback T304 SS Carbon Fiber 3.5" Tips

The Audi B9 S4 and S5, powered by the EA839 3.0L V6, have impressive performance potential—but the stock exhaust hides much of this engine’s true character. The Valvetronic Designs Full Valved Exhaust System unleashes its voice, delivering an aggressive, motorsport-inspired tone when desired, and stock-like refinement when needed. Unlike typical setups requiring multiple components from different vendors, our system is engineered as a complete solution—from the OEM or aftermarket downpipe all the way to the exhaust tips. This single-package design eliminates the need for mixing and matching resonator sections or axle-backs from other brands, ensuring perfect fitment, seamless performance, and consistent sound quality. With valves open, expect a bold exhaust note, pronounced overrun crackles, and a commanding presence. With valves closed, the car returns to quiet factory manners, with zero drone when paired with the OEM downpipe. For those upgrading from the V8-powered B6 or B7 S4, our system delivers the level of engagement and emotional sound you’ve been missing—ensuring your B9 ownership experience is just as exciting.

• T304 stainless steel for long-term durability and corrosion resistance.
• Full mandrel-bent 2.5" T304 stainless steel
• Electronic Valve Control: Switch between aggressive and refined sound instantly.
• 16.4 lb lighter than the OEM exhaust system.
• Paired With Signature Real Carbon Tips

What's Included

Valved exhaust system, Electronic exhaust valves with key fob remote system, and Valvetronic carbon fiber tips

Features & Components

One-Piece System Design: Eliminates the need for mixing components from multiple vendors, Electronic Valve Control: Switch between aggressive and refined sound instantly

Installation Notes

Bolt on Installation for sedan models, Coupe models require modification to shorten the mid-section for proper fitment.

Fitment

2019-2024 Audi S4, S5

Our turbo specifications are built for maximum durability under high load. Check the manual for exact torque tolerances.

In-stock items ship within 24-48 business hours. Orders over $599 qualify for free standard ground shipping in the contiguous US.

We accept returns on unused items in original packaging within 30 days. Contact our support team for an RMA.