Turbo Downpipe Milltek Audi S4 B9 3.0 Turbo V6 2016-2018 - ECE Homologated - HJS Tuning ECE Downpipe

Milltek Sport turbo downpipe with sport catalytic converter for Audi S4 B9

This Milltek Sport turbo downpipe for Audi S4 B9 frees the exhaust at the turbo outlet while keeping a high-flow sport cat: the best compromise between performance and emissions control.

Technical specifications

• Milltek part number: SSXAU725
• Part type: Turbo downpipe with sport catalytic converter
• Details: ECE homologated - HJS Tuning ECE downpipe
• Pipe diameter: 63.5 mm
• Installation information: Euro 6 - Fits OEM and Milltek exhaust line
• Material: aerospace-grade stainless steel
• Homologation: ECE / EC homologated
• Manufacturer: Milltek Sport (UK)

Compatible vehicles

• Audi S4 B9 3.0 Turbo V6 (Without sport differential, Sedan - Wagon, 2016-2018)
• Audi S4 B9 3.0 Turbo V6 (With sport differential and without rear chassis reinforcement bars, Sedan - Wagon, 2016-2018)

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

Most frequently asked questions

• Is ECU tuning required? Yes. A matching ECU map (Stage 2) is essential to get the full gain and avoid a check engine light linked to the lambda sensors. It is the question buyers ask most often, and the answer is always the same.
• 200-cell sport catalytic converter: it keeps real emissions control while flowing far more than the original. It is the choice of tuners who want to keep their vehicle clean.

Why choose Milltek Sport?

Milltek Sport designs and manufactures its exhaust systems in England, with mandrel-bent tubing to preserve the inside diameter and a fit developed on the vehicle. Result: a clean fit with no modification needed, and a sound tuned to stay pleasant for everyday driving.

Going further

• Turbo downpipe: decat pipe or sport catalytic converter for your Stage 2?
• Exhaust systems and French technical inspection