DPF Back Milltek Audi RS4 B9 2.9 V6 T 2019-2025 with DPF, no primary muffler, non-resonated, Oval Polished Outlets

Milltek Sport DPF-back exhaust for Audi RS4 B9

Replacing the original exhaust with a Milltek Sport DPF-back system brings back the character that the factory exhaust holds back in your Audi RS4 B9: a rounder tone at idle, which opens up clearly through the revs, without artifice.

Technical specifications

• Milltek part number: SSXAU825
• Part type: DPF-back exhaust
• Configuration: non-resonated (no resonator), with valves
• Detail: No primary muffler or resonator, oval polished stainless steel outlets
• Pipe diameter: 70 mm (2.75 inches)
• Outlets: 170 X 107mm oval outlet
• Tip finish: polished stainless steel
• 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, 2019-2025, with DPF)

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

Most 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. On the other hand, a slight drone may 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 original: closed and discreet at startup or in comfort mode, fully open in sport mode.
• Installation: the exhaust uses the original mounting points. A repair shop with the right equipment typically fits it in one to two hours.

Why choose Milltek Sport?

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

Going further

• Resonated or non-resonated cat-back exhaust: which one to choose for your car?
• Valved exhaust system: how does it work, and should you keep the valves?