Milltek Sport Audi B9 S4 Non-resonated Catback Exhaust - Models Without Sport Differential

Milltek Sport
Direct Ship

Let the turbocharged V6 in your B9 Audi S4 sing with this valved exhaust system from Milltek Sport.

This exhaust system re-uses the factory valve system for a complete plug and play experience. Simply un-bolt the factory exhaust valves and re-install into your new exhaust. Your valves will continue to operate as they did with your factory exhaust system.

Please note that this exhaust will not fit vehicles equipped with the factory sport differential option.

Loud or Really Loud?

This exhaust is non-resonated and is much louder than the resonated version. We only recommend choosing the non-resonated version only if you live in an area where excessive sound is not an issue.

Tip Options

Choose from Cerakoted black, Polished, or Titanium tip finishes. No matter which tip option you choose, each exhaust comes in a quad tip configuration that's sure to catch your eye each time you see the back of your car.

High Quality Materials and Construction

Milltek Sport exhausts are produced in high quality type 304 aircraft grade stainless steel. This material is anti-magnetic (other manufacturers' stainless steel may not be) and is less susceptible to discoloration. This quality of stainless steel is used on all pipe work and the total construction of the silencer. Mandrel bending ensures full flow bends for better gas flow and Milltek Sport exhaust systems are increased in bore to ensure ultimate performance without the loss of mid-range torque. All Milltek Sport exhausts are designed, developed and manufactured in-house in the UK.

Milltek Sport's range of Cat-Back systems are perfectly suited to cater for anyone looking to improve their sound and aesthetics, designed as a direct replacement for the original system, available in multiple configurations enabling the owner to choose the increase in volume of their exhaust and/or add a more suitably aggressive tone. All our products are made from 304L “Aircraft” Grade stainless steel. This quality material will ensure that your Cat-Back system will last through any harsh conditions.

All Milltek Sport performance exhaust systems are designed with you in mind, and they cater to an ever-expanding range of vehicles. Milltek Sport believes in continuous evolution, and their research & development team work throughout the year to deliver the most in demand solutions to all your performance exhaust requirements.


  • 2018+ Audi B9 S4 3.0T Without Sport Differential

Please note that due to a difference between US and European cars, your installer may need to make a slight adjustment. This adjustment can be made by moving the steering column shaft within the rubber boot.

Read More
Read Less

Your cart