Cat-back Milltek Audi S4 B9 2016-2018, S5 F5 2017-2018 - No primary muffler - Quad Oval Polished - without sport diff.

Milltek Sport Exhaust System for Audi S4 B9 / S5 F5

Is the factory sound of your Audi S4 B9 / S5 F5 leaving you wanting more? This Milltek Sport stainless steel exhaust system is the most requested upgrade among owners: more presence, a distinctive sound signature, and build quality that lasts.

Technical specifications

• Milltek part number: SSXAU659
• Part type: Exhaust system
• Configuration: with valves
• Detail: Without primary muffler, quad oval polished stainless steel outlets
• Tube diameter: 63.5 mm
• Outlets: 4 oval outlets
• Tip finish: polished stainless steel
• Fitment information: Models without Sport Diff, with valves
• Material: aerospace-grade stainless steel
• Manufacturer: Milltek Sport (UK)

Compatible vehicles

• Audi S4 B9 3.0 Turbo V6 (without Sport Diff, Sedan, Avant, 2016-2018)
• Audi S5 F5 3.0 V6 T (without Sport Diff, Sportback, 2017-2018)

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

Our most frequently asked questions

• What about the neighbors in the morning? The valves are controlled as on the factory system: closed and discreet at startup or in comfort mode, fully open in sport mode.
• Fitting: the system uses the original mounting points. A repair shop with the right equipment typically fits it in one to two hours.

Why choose Milltek Sport?

A benchmark among European tuners, Milltek Sport develops each of its systems directly on the vehicle. Mandrel bending, careful welds and aerospace-grade stainless steel ensure a system that lasts and sounds right.

Further reading

• Exhaust systems with valves: how they work and should you keep them?