Stainless 304 Valved Catback Exhaust System for Audi RS4 RS5 B9 B9.5 2.9T

Part Number: 721814382648
Bull Boost Performance
$1,999.95
| /

Enhance sound, performance, and durability on your Audi RS4 or RS5 2.9T with the STRATEC 304 Stainless Steel Valved Cat-Back Exhaust System. Engineered for drivers who want aggressive sound on demand with everyday refinement, this system delivers a powerful motorsport-inspired exhaust note when valves are open and a quieter, OEM-like tone when closed.

Constructed from high-quality 304 stainless steel, this exhaust offers excellent heat resistance, corrosion protection, and long-term reliability while remaining lighter than the factory exhaust. The valved muffler design provides instant sound control, making it ideal for both daily driving and spirited performance use.


Key Features

  • Fits Audi RS4 & RS5 B9 / B9.5 2.9T

  • 304 stainless steel construction for durability and longevity

  • Valved cat-back exhaust system with adjustable sound modes

  • Aggressive, performance-focused tone with valves open

  • Quiet, refined operation with valves closed

  • Improves exhaust flow and throttle response

  • Precision TIG-welded for strength and clean finish

  • Direct bolt-on installation using factory mounting points


Sound Modes

  • Valves Open: Loud, deep, and motorsport-inspired exhaust note

  • Valves Closed: Refined, OEM-like sound for daily driving