Milltek Sport Audi RS4 B7 4.2 V8 Cat-Back Exhaust System

The B7 RS4's naturally-aspirated 4.2-litre V8 is genuinely one of the great engines of its era, a screaming, high-revving unit shared in spirit with contemporary Ferrari V8s, and the factory exhaust leaves real character on the table, tuned as much around noise regulations as outright drama. Milltek Sport's Cat-Back exhaust replaces everything from the catalytic converter rearward, engineered to deliver genuine gains in flow, sound, and weight over the factory system, letting this naturally-aspirated V8 sing the way it genuinely deserves to.

Constructed entirely from T-304 stainless steel, this system is built to outlast the car itself, resisting the corrosion that eventually catches up with mild steel factory systems, especially through wet European winters. Milltek's own sound engineers spend considerable time tuning each system's resonance and tone, striking a genuine balance between a purposeful V8 character and everyday drivability, avoiding the drone that can plague poorly engineered aftermarket systems on a long motorway drive.

Please select your configuration at checkout: Resonated or Non-Resonated, each available in Valved or Non-Valved form, and in either Polished (round or oval) or Satin Sheep Black tip finish.

• Valved versions let you control the exhaust character further, opening up under load
• Non-Valved versions offer a fixed, consistent character throughout the rev range

Why Choose This Exhaust System

• Genuine gains in flow, sound, and weight over the factory system
• T-304 stainless steel construction throughout, built to outlast the factory system
• Valved options for further control over exhaust character under load
• Milltek's own sound engineering, letting this naturally-aspirated V8 sing properly
• Choice of Polished or Satin Sheep Black tip finish

Compatibility

• Audi RS4 (B7) 4.2 V8