Description
TM Performance Audi S4 S5 B9 3.0TFSI Stainless Steel Decat Downpipe
The S4 B9 Downpipe and flanges are machined from SS304 aircraft-grade stainless steel and are tig welded in house.
The downpipe is 5" straight out of the turbo and 2.5" when it splits into 2 which provides a sharper throttle response due to faster spool of the turbo.
Provides noticeable power gains and a much more aggressive exhaust note which sounds truly amazing. Feedback from customers is that the downpipe crackles and bangs but is quiet on the motorway which is perfect.
It produces lower temperatures and less exhaust backpressure due to the relief of the turbocharger. The cylinder charge is increased meaning you get maximum performance.
There is also a substantial weight saving in comparison to the factory catalytic converter.
The decat is mandrel-bent for better gas flow and maximum internal size to ensure ultimate performance without the loss of mid-range torque.
Finished in brushed stainless.
Heat shield fabricated over the full downpipe to minimise the heat in the engine bay.
Various version for S4 B9 Downpipe:
with heat shield/without heat shield/with high flowing catalytic converters/without high flowing catalytic converters




TM Performance Video
Features
*Increased Horsepower & Torque Throughout the Powerband
*Quicker Turbocharger Spool & Faster Transient Response
*Enhanced Exhaust Note & Turbocharger Sounds
*Direct, Bolt-In Upgrade for Factory Catalytic Converter
*304 Stainless Steel Construction
*Integrated Inlet/Outlet Flanges & O2 Sensor Bung
*Precision CNC-Machined Flange Mating Surfaces
*TIG Welded & Back purged
Fitment
Audi S4 B9 3.0TFSI Avant and Sportback
Audi S5 B9 3.0TFSI Cabriolet and Coupe
Welcome to contact us for more details!
An ECU tune will be required to fit these downpipes.
Please work with your tuner to ensure the correct ECU calibrations are carried out.

TM Performance was established in 2015. It is a professional exhaust system manufacturer created by the creative R & D team, skilled mechanics and passionate sales.
Our products' quality&fitment were highly recognized by many customers in the past 10 years.
We already stably supply items for some big brands in US/UK/DE/AU. Export over $5 million annually.
What's the payment terms you usually do?
For stock items, we ask for 100% TT before shipment.
For to-do orders, we ask for 30%-50% deposit, and we show you details when finished, balance before shipment.












