Milltek Cat-Back Audi S4 B9 2016-2018, S5 F5 2017-2018 - No Primary Muffler - Quad GT90 Blued Titanium Tips

Milltek Sport Exhaust System for Audi S4 B9 / S5 F5

On the Audi S4 B9 / S5 F5, the factory exhaust is designed for quiet operation and regulations. This Milltek Sport stainless steel exhaust system gives the engine its voice back with a refined, full, deep tone, the sound that built the reputation of this British brand.

Technical specifications

• Milltek part number: SSXAU654
• Part type: Exhaust system
• Configuration: with valves
• Details: Without primary muffler - quad GT90 outlets, blued titanium
• Pipe diameter: 63.5 mm
• Outlets: 4 GT90 outlets, 90 mm
• Tip finish: blued titanium (heat-tint effect)
• Fitting 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 differential, sedan and wagon, 2016-2018)
• Audi S5 F5 3.0 V6 T (without sport differential, Sportback, 2017-2018)

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

Most frequently asked questions

• What about the neighbors in the morning? The valves operate as on the factory system: closed and quiet at startup or in comfort mode, fully open in sport mode.
• Installation: the system uses the factory mounting points. An equipped repair shop 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 bends, careful welds and aerospace-grade stainless steel ensure a system that lasts and sounds right.

Going further

• Valved exhaust systems: how do they work, and should you keep them?