Milltek Sport Audi RS4 B9 / RS5 B9 / RS6 C8 / RS7 C8 Active Valve Control

Milltek Sport's Active Valve Control system for the Audi RS4 (B9), RS5 (B9), RS6 (C8), and RS7 (C8) gives you genuine, direct control over the exhaust valve behaviour from inside the cabin, independent of the car's factory drive mode settings. Switch between a quieter, more restrained setting for early mornings or long motorway drives, and a fuller, more purposeful sound on demand, letting the twin-turbo V6 or V8 across this range make its presence known exactly when you want it to.

This is a genuinely popular addition for owners who want flexibility, sportier sound when you want it, without being locked into one setting permanently or needing to compromise on everyday usability. Whether you're pulling out of a quiet residential street early in the morning or opening things up on a spirited weekend drive, this system puts that decision back in your hands rather than leaving it tied to whichever drive mode the car happens to be in.

Please note: confirm exact cross-platform fitment with your supplier before publishing, as this same part number spans four genuinely different models (RS4, RS5, RS6, RS7) across two chassis generations.

Why Choose This Active Valve Control

• Genuine cockpit control over exhaust valve behaviour, entirely independent of the car's drive mode
• Switch between a quieter, restrained setting and a fuller, more purposeful sound on demand
• Shared fitment across the RS4/RS5 B9 and RS6/RS7 C8 range
• Genuinely useful for balancing daily-driver civility with weekend driving character

Compatibility

• Audi RS4 (B9)
• Audi RS5 (B9)
• Audi RS6 (C8)
• Audi RS7 (C8)