Titanium Valved Catback Exhaust System for Audi B9 S4 S5

Take your Audi B9 S4 or S5 to the next level with the STRATEC Ultra-Light Titanium Valved Exhaust System, engineered for maximum weight reduction, performance, and sound control. Built for enthusiasts who demand the lightest possible setup without compromising durability, this system delivers a sharp, aggressive exhaust note when valves are open and refined, OEM-like behavior when closed.

Designed as a complete one-piece system from the downpipe connection to the exhaust tips, this exhaust eliminates the need to mix components from different suppliers, ensuring consistent sound quality, perfect fitment, and seamless performance.

With valves open, expect a crisp, motorsport-inspired tone with pronounced overrun crackles. With valves closed, the system remains quiet and comfortable for daily driving—without drone when paired with the factory downpipe.

Why It Works

• Ultra-Light Titanium Construction: Significant weight savings over stainless steel

• Electronic Valve Control: Instantly switch between aggressive and refined sound

• One-Piece System Design: No need to mix axle-backs or resonators

• Mandrel-Bent Titanium Tubing: Maximizes flow and throttle response

Sound & Control

• Valves Open: Loud, sharp, and performance-focused exhaust tone

• Valves Closed: Quiet, refined, and daily-drivable

• No Drone: When paired with the OEM downpipe

Construction & Details

• Material: Full titanium construction for extreme weight reduction

• Weight Savings: Significantly lighter than factory and stainless systems

• Craftsmanship: Precision TIG welding and smooth mandrel bends

• Exhaust Tips: Includes premium titanium tips for a motorsport finish

Vehicle Fitment

• 2017–2024 Audi S4 (B9)

• 2018–2024 Audi S5 (B9)