Cat-Back Milltek Audi S6 C7, S7 4G - With Primary Mufflers and Non-Resonated - Quad GT100 Cerakote Black

Milltek Sport Exhaust System for Audi S6 C7 / S7 4G

On the Audi S6 C7 / S7 4G, the original exhaust is designed for quietness and regulatory compliance. This Milltek Sport stainless steel exhaust system gives the engine its voice back with a refined, full, deep sound, the kind that has built the reputation of the English brand.

Technical specifications

• Milltek part number: SSXAU448
• Part type: Exhaust system
• Configuration: non-resonated (no resonator), with valves
• Details: With primary mufflers and no resonator, quad GT100 black Cerakote tips
• Tube diameter: 70 mm (2.75 inches)
• Outlets: 4 GT100 outlets of 100 mm
• Tip finish: black Cerakote (high-temperature ceramic)
• Fitting information: With valves. Note: some 2016 and later models require an extension of the valve wiring on a rear muffler.
• Material: aerospace-grade stainless steel
• Manufacturer: Milltek Sport (UK)

Compatible vehicles

• Audi S6 C7 4.0 TFSI (Quattro, 2012-2018)
• Audi S7 4G 4.0 TFSI (S-tronic, Quattro, Sportback, 2012-2018)

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

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. The trade-off is a slight drone that can 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.
• Fitting: the system uses the original mounting points. A workshop 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 tubes to preserve the inner diameter and a fit developed on the vehicle. The result: a clean installation without modification, and a sound tuned to stay pleasant for everyday use.

Going further

• Resonated or non-resonated cat-back exhaust: which one for your car?
• Exhaust valves: how do they work and should you keep them?