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Milltek Catback Exhaust for Audi S4 B9 (Resonated) (GT-90 Burnt Titanium Tips)


Availability: ships in 24-48 hours

Manufacturer's Suggested Retail Price $3,559.00

Regular Price: $3,559.00

Special Price $3,203.10


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The latest new development from Milltek Sport is a new range of Performance exhaust options for the new Audi B9 S4, available in both resonated and non-resonated variants with a wide range of tip options, including polished stainless, cerakote satin black and titanium in both brushed and burnt finishes.

Featuring a twin 63.5mm pipework design through the majority of the system it increases both performance and sound beyond the well regarded OE system. The system is constructed with lighter weight 1.2mm wall thickness 304L stainless steel to help reduce the total weight of the exhaust system.

In addition the system enables use of factory motors for the electronic valves in the rear silencers to enable greater control over the sound of the car, which is completely compatible with Audi drive select.


Consists of:

  • 1 x LH Downpipe
  • 1 x RH Downpipe
  • 1 x Front Silencer Pipe
  • 1 x Connecting Pipe Assembly
  • 1 x LH Rear Silencer with Valve (reuses motor from OE system)
  • 1 x RH Rear Silencer with Valve (reuses motor from OE system)
  • 1 x LH Mounting Bracket
  • 1 x RH Mounting Bracket
  • 4 x Tips


Pipe Size:

  • 2.5" (63.5mm)


Tip Style:

  • 4 x Burnt Titanium 90mm GT-90 Tips


Company history and other general information about Milltek Sport

Over 20 years of continuous exhaust development and technical expertise are drawn upon to develop the ultimate Milltek Sport range of performance products.

Milltek Sport offer an ever expanding comprehensive selection of Performance exhausts which build on the successes of key marques like Audi, Volkswagen, Porsche, Mini and BMW. This has placed Milltek Sport at the forefront of tuning companies and owners ‘must have’ list. Milltek Sport have appointed key distributors and are currently exporting to over 60 countries around the world.

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 discolouration. This quality of stainless steel is used on all pipework and the total construction of the silencer. Mandrel bending ensures full flow bends for better gas flow and Milltek systems are increased in bore to ensure ultimate performance without the loss of mid range torque.


Why buy a Milltek Sport exhaust?

Milltek Sport exhausts have a genuine performance edge - noticable power gains, sounds that are truely awesome, styled looks that are aggressive but discrete and a feeling of true exhilaration.

  • Transforms performance and driveability
  • Sharper throttle response
  • Substantial weight saving over original equipment systems
  • Precision, quality controlled manufacture to ISO 9001 standards
  • Highest quality aircraft-grade stainless steel
  • Low pressure systems for maximum performance - with no loss of low end torque
  • Responsibly developed and engineered
  • Designed and manufactured in the UK

Additional Info

Additional Info

Weight 60.0000
Box Size N/A
Manufacturer Milltek
Country of Manufacture United Kingdom
USA Location Imported by ESE Tuning
Warranty Limited Lifetime Warranty
Installation Instructions (PDF)

click here

Rebates (PDF) N/A

Application Guide

Make Model Drivetrain Chassis / Year Engine
Audi S4 Quattro B9 (2018-PRESENT) 3.0T


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