Titanium Valved Catback Exhaust System for Audi B8 B8.5 S4 S5

Unleash the full character of your Audi B8/B8.5 S4 or S5 with the STRATEC Ultra-Light Titanium Valved Exhaust System, engineered for enthusiasts who want maximum weight reduction, sharper response, and adjustable sound control. Built entirely from titanium, this system delivers a crisp, high-energy exhaust tone when valves are open and refined, OEM-like behavior when closed.

Designed as a complete one-piece exhaust system, it eliminates the need to mix axle-backs, resonators, or mid-pipes from different suppliers—ensuring consistent sound quality, proper fitment, and seamless performance.

With valves open, expect an aggressive, motorsport-inspired tone with strong midrange presence and exciting overrun character. With valves closed, the exhaust remains quiet and comfortable for daily driving, with minimal drone when paired with the factory downpipe.

Why It Works

• Ultra-Light Titanium Construction: Significant weight savings over stainless and factory systems

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

• One-Piece System Design: No component mixing for perfect fit and sound balance

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

Sound & Control

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

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

• Driver-Controlled Valves: On-demand sound adjustment

Construction & Details

• Material: Full titanium construction for extreme weight reduction

• Weight Savings: Significantly lighter than OEM and stainless systems

• Craftsmanship: Precision TIG welding and smooth mandrel bends

• Exhaust Tips: Premium titanium tips for a clean motorsport finish

Vehicle Fitment

• 2010–2016 Audi S4 (B8 / B8.5)

• 2010–2016 Audi S5 (B8 / B8.5)