Catback Milltek Audi S4 B6 4.2 V8 2003-2005 - non-resonated - Dual GT100 Black Cerakote

Milltek Sport cat-back exhaust for Audi S4 B6

On the Audi S4 B6, the original exhaust is designed for quiet operation and regulatory compliance. This Milltek Sport stainless steel cat-back exhaust gives the engine its voice back, with a refined, full and deep sound, the one that built the reputation of this British brand.

Technical specifications

• Milltek part number: SSXAU873
• Part type: Cat-back exhaust
• Configuration: non-resonated (no resonator)
• Details: No resonator, dual GT100 tips in black Cerakote
• Tube diameter: 57.15 mm
• Outlets: 2 GT100 tips of 100 mm
• Tip finish: black Cerakote (high-temperature ceramic)
• Material: aerospace-grade stainless steel
• Manufacturer: Milltek Sport (United Kingdom)

Compatible vehicles

• Audi S4 B6 4.2 V8 (Quattro, Sedan, Avant, Convertible, 2003-2005)

Not sure it fits your vehicle? Contact us with your VIN (chassis number) before ordering.

Our 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 downside, a slight drone may be noticeable at certain engine speeds on long trips. If you do a lot of highway driving, compare it with the resonated version.
• Installation: the system uses the original mounting points. A properly equipped repair shop typically fits it in one to two hours.

Why choose Milltek Sport?

Feedback from users most often highlights the quality of fit and a deep sound that is present but never harsh. This is the Milltek Sport signature, from a British manufacturer specialized in stainless steel exhausts.

Going further

• Resonated or non-resonated cat-back exhaust: which one is right for your car?