Titanium Valved Catback Exhaust System for Audi B9 S4 S5

$2,699.95 USD

Before You Order

Confirm fitment, lead time, and install details before checkout.

Fitment Support In Stock / Made To Order Returns Check
Fitment Check Confirm year, make, model, trim, bumper style, wiring, and selected options before checkout.
Build Details Photos, vehicle search, and recommendations are helpful guides; final fitment can vary by build.
Lead Time In-stock items move fastest. Made-to-order specialty parts may need extra preparation before tracking updates.
Inspect First Inspect every part before painting, drilling, cutting, modifying, or installing it.
Not sure it fits? Send your vehicle details and product link to support@vektomotorsports.com. Ask Support

COMPLETE YOUR SETUP

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)

Description

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)

Fitment & Install Notes

Fitment first: Confirm your vehicle year, make, model, trim, bumper style, wiring, and product options before checkout. Product photos, vehicle search, and recommendations are helpful guides, but final fitment can depend on trim, modifications, and install setup.

  • Installation: Professional installation is recommended for lighting, exhaust, carbon fiber, steering wheel, brake, and body components.
  • Lead time: In-stock items move fastest. Made-to-order specialty parts may need extra preparation before tracking updates.
  • Before install: Inspect all parts before painting, drilling, cutting, modifying, or installing. Contact us first if anything looks incorrect.
  • Need help? Email support@vektomotorsports.com before purchase if you want fitment support for your build.