Cat-Back Exhaust Milltek Audi RS4 B9 2018-2025, ECE Homologated: with primary muffler, resonated, Dual Oval Tips Blued Titanium

Milltek Sport Exhaust System for Audi RS4 B9

Replacing the factory exhaust with a Milltek Sport system brings back the character that the Audi RS4 B9 engine muffles as standard: a rounder sound at idle, which opens up clearly through the revs, without artifice.

Technical specifications

• Milltek part number: SSXAU806
• Part type: Exhaust system
• Configuration: resonated (with resonator), with exhaust valves
• Details: ECE homologated, with primary muffler and resonator, dual oval blued titanium tips
• Tube diameter: 70 mm (2.75 inches)
• Outlets: 2 oval tips
• Tip finish: blued titanium (heat-tint effect)
• Fitting information: ECE version, with valves
• Material: aerospace-grade stainless steel
• Homologation: ECE / EC homologated
• Manufacturer: Milltek Sport (UK)

Compatible vehicles

• Audi RS4 B9 2.9 V6 T (Wagon, 2018-2025, no DPF)

Not sure about compatibility with your vehicle? Contact us with your VIN before ordering.

Our most frequently asked questions

• Highway drone? This is the number one concern on forums. This version keeps a resonator: the sound stays full under acceleration, while the system remains unobtrusive at steady cruising speed, ideal for daily driving.
• What about the neighbors in the morning? The valves are controlled as on the factory system: the line stays closed and discreet at startup or in comfort mode, and fully opens in sport mode.
• Homologation: this system is ECE / EC homologated, a real plus for driving with peace of mind and passing the French technical inspection (contrôle technique).
• Fitting: the system uses the factory mounting points. A properly equipped repair shop usually fits it in one to two hours.

Why choose Milltek Sport?

Milltek Sport designs and manufactures its exhausts in England, with mandrel-bent tubes to preserve the inner diameter and a fit developed on the vehicle. The result: a clean installation without modification, and a sound tuned to remain pleasant for everyday use.

Further reading

• Cat-back exhaust: resonated or non-resonated, which one to choose for your car?
• Exhaust valves: how do they work and should you keep them?
• Exhaust systems and the French technical inspection (contrôle technique)