Cat-back Milltek Audi S4 B9, S5 F5 - No Primary Silencer - Quad GT100 Cerakote Black Tips - with Sport Diff.

Milltek Sport exhaust system for Audi S4 B9 / S5 F5

Replacing the factory exhaust with a Milltek Sport system brings back the character that the engine of your Audi S4 B9 / S5 F5 holds back from the factory: a rounder tone at idle that opens up clearly as the revs climb, without gimmicks.

Technical specifications

• Milltek part number: SSXAU701
• Part type: Exhaust system
• Configuration: with valves
• Details: No primary silencer, quad GT100 black Cerakote tips
• Pipe diameter: 63.5 mm
• Outlets: 4 GT100 outlets, 100 mm each
• Tip finish: black Cerakote (high-temperature ceramic)
• Installation information: Models with Sport Differential and without chassis reinforcement bars (visual check required) - with valves
• Material: aerospace-grade stainless steel
• Manufacturer: Milltek Sport (United Kingdom)

Compatible vehicles

• Audi S4 B9 3.0 Turbo V6 (with Sport Differential and no rear chassis reinforcement bars, Saloon, Avant, 2016-2018)
• Audi S5 F5 3.0 V6 T (with Sport Differential and no rear chassis reinforcement bars, 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 on startup or in comfort mode, fully open in sport mode.
• Installation: the system uses the factory mounting points. A equipped repair shop typically fits it in one to two hours.

Why choose Milltek Sport?

Milltek Sport designs and manufactures its exhausts in England, using mandrel-bent tubing to preserve the internal diameter and a fitment developed on the vehicle. The result: a clean installation with no modification required, and a sound tuned to remain pleasant for everyday driving.

Further reading

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