Cat Replacement Milltek Audi S4 B6 4.2 V8 2003-2009 - Decat Downpipes

Milltek Sport decat pipe for Audi S4 B6

This Milltek Sport decat pipe for Audi S4 B6 replaces the catalytic converter with a free-flowing stainless steel pipe, for maximum flow and a more aggressive sound.

Technical specifications

• Milltek part number: SSXAU289
• Part type: Decat pipe
• Detail: Decat downpipe
• Tube diameter: 63.5 mm
• Fitting information: For use with Milltek exhaust system - Manual gearbox models only - ECU remap
• Material: aerospace-grade stainless steel
• Manufacturer: Milltek Sport (UK)

Compatible vehicles

• Audi S4 B6 4.2 V8 (Quattro, Saloon - Estate - Cabriolet, 2003-2005)
• Audi S4 B6 4.2 V8 (Quattro, Saloon - Estate - Cabriolet, 2004-2009)

Unsure about compatibility with your vehicle? Contact us with your VIN before ordering.

Most frequently asked questions

• Is a remap required? Yes. A suitable ECU map (Stage 2) is essential to get the gain and avoid a check engine light caused by the lambda sensors. It is the question buyers ask most, and the answer is always the same.
• And what about the technical inspection (contrôle technique)? A decat downpipe does not pass the emissions test. This product is reserved for motorsport use.
• Exhaust compatibility: this downpipe is designed to connect to a Milltek exhaust. Check the version suited to your stock exhaust if you keep the original system.

Why choose Milltek Sport?

What comes up most often in user feedback: fit quality and a deep tone that is present but never harsh. That is the Milltek Sport signature, from the British exhaust specialist in stainless steel.

Going further

• Turbo downpipe: decat or high-flow catalytic converter for your Stage 2?
• Exhaust systems and technical inspection (contrôle technique) in France

This product is intended exclusively for motorsport use, on closed circuits. Its use on public roads is not permitted.