Milltek Cat-Back Exhaust Audi RS4 B9 2018-2025 - no primary muffler, non-resonated - Dual Oval Blued Titanium Tips

Milltek Sport Exhaust System for Audi RS4 B9

Is the factory sound leaving you wanting more? This Milltek Sport stainless steel exhaust is the upgrade owners ask for most: more presence, a real sound signature, and build quality that lasts.

Technical specifications

• Milltek part number: SSXAU808
• Part type: Exhaust system
• Configuration: non-resonated (no resonator), with valves
• Details: No primary muffler and no resonator, dual oval blued titanium outlets
• Tube diameter: 70 mm (2.75 in)
• Outlets: 2 oval outlets
• Tip finish: blued titanium (heat-tint effect)
• Fitment information: Road+ version (ECE rear muffler) - With valves
• Material: aerospace-grade stainless steel
• Manufacturer: Milltek Sport (UK)

Compatible vehicles

• Audi RS4 B9 2.9 V6 T (Avant, 2018-2025, non-FAP)

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

Frequently asked questions

• Resonated or non-resonated? This version is non-resonated (no resonator): it is the most expressive, with more crackle on lift-off. The trade-off is a slight drone that can appear at certain engine speeds on long trips. If you do a lot of highway driving, compare it with the resonated version.
• What about the neighbors in the morning? The valves are controlled as on the factory system: closed and quiet at startup or in comfort mode, fully open in sport mode.
• Installation: the system uses the original mounting points. A shop with the proper equipment typically fits it in one to two hours.

Why choose Milltek Sport?

What customers mention most often in their feedback is fit quality and a deep tone that is present but never harsh. That is the Milltek Sport signature, from the British maker specializing in stainless steel exhausts.

Further reading

• Resonated or non-resonated cat-back exhaust: which one should you choose for your car?
• Exhaust valves: how they work and whether to keep them