Audi B8, B8.5 S4, S5 3.0, 4.2L Catback T304 SS Anodized Gold, 3.5" Tips

Transform your supercharged V6 into a true auditory experience. Our Valvetronic Designs Valved Exhaust System for the Audi B8 and B8.5 S4/S5 delivers a unique, high-pitch wail while retaining low-end rawness for a sound profile unlike anything the platform has heard before. Constructed entirely from T304 stainless steel and featuring our high-pitch X-pipe technology, this system runs 2.5 inches from front to rear, unlocking an exhilarating tone across the entire rev range. With integrated vacuum-actuated valves controlled via an included key fob remote, you have instant flexibility to switch from refined cruising to an aggressive, motorsport-inspired soundtrack.

Why It Works:
- High-Pitch X-Pipe Technology: Creates a sharper, more exotic tone while enhancing flow.
- Vacuum Valve Control: Allows on-demand sound control from the included key fob remote.
- Full Mandrel-Bent Design: Optimized flow for improved throttle response and power delivery.

Sound & Control:
- Valves Closed: Quiet enough for early morning starts and comfortable highway cruising.
- Valves Open: Releases the full character of the supercharged V6 with both low-end depth and high-pitch excitement.
- Remote Control: Operate valves instantly from the driver’s seat using the included key fob system.

Construction & Options:
- Material: T304 stainless steel for long-term durability and corrosion resistance.
- Weight Savings: 12.3 lb lighter than the factory exhaust.
- Craftsmanship: Precision TIG welds and mandrel bends for maximum flow and strength.
- Diameter: 2.5" tubing from front to tips.

Installation Notes:
- Direct OEM replacement—no permanent modifications required.
- 100% reversible—return to stock at any time.