Cat-Back Milltek Audi A4 B9 2016-2025, ECE Homologated, Primary Muffler, Resonated, Dual GT100 Titanium Tips

Milltek Sport Exhaust System for Audi A4 B9

Replacing the factory exhaust with a Milltek Sport system restores the character that the stock setup suppresses in your Audi A4 B9: a rounder tone at idle that opens up cleanly through the revs, with no artificial effects.

Technical Specifications

• Milltek Part Number: SSXAU609
• Part Type: Exhaust system
• Configuration: resonated (with resonator)
• Details: ECE homologated, with primary muffler and resonator, dual GT100 titanium tips
• Tips: 2 GT100 tips, 100 mm
• Tip finish: titanium finish
• Material: aerospace-grade stainless steel
• Homologation: ECE / EC homologated
• Manufacturer: Milltek Sport (United Kingdom)

Compatible Vehicles

• Audi A4 B9 2.0 TFSI (Quattro, Sedan, Avant, 2016-2025, no DPF)

Not sure about fitment for your vehicle? Contact us with your chassis number (VIN) before ordering.

Most Frequently Asked Questions

• Highway drone? It is the number one concern on forums. This version keeps a resonator: the sound stays full under acceleration, while the system remains calm at steady cruising speed, ideal for daily driving.
• Homologation: this system is ECE / EC homologated, a real advantage for driving with peace of mind and passing the technical inspection.
• Installation: the system uses the original mounting points. A well-equipped repair shop usually fits it in one to two hours.

Why Choose Milltek Sport?

Feedback from owners most often mentions fit quality and a deep sound that is present but never harsh. This is the Milltek Sport hallmark, from the British manufacturer specializing in stainless steel exhausts.

Going Further

• Resonated or non-resonated cat-back exhaust: which one should you choose for your car?
• Exhaust System and Technical Inspection in France