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  Awaiting stock. Order today for dispatch in 16 working days.


Unlock Stage 2 for your B8 2.0T! Equipping your B8 A4 or A5 2.0T engine with an IE catted downpipe delivers additional horsepower, torque, and responsiveness when paired with a required stage 2 ECU tune. These significant power gains are added through the entire RPM band by allowing the turbocharger to flow freely through the 3" downpipe, high-flow catalytic converter, and mid-pipe. Careful tuning of the added sound from freeing up exhaust flow rewards you with an aggressive exhaust growl every time you accelerate while minimizing cabin drone.

All IE exhaust systems are designed in-house using state of the art digital scanning for a perfect fit and manufactured from 1/16” thick wall 304 stainless steel offering a lifetime of performance and fun.




  • Over 30 horsepower gains - with matching Stage 2 Tune
  • 3" minimum size for maximum flow and performance potential
  • Aggressive Motorsport exhaust sound
  • Direct bolt-on fitment with no modifications required
  • 100% 304 stainless steel pipe construction
  • Machined turbo flange ensures long gasket life and no leaks
  • High flow 200 cell catalytic converter for full power with reduced pollution
  • Fully lined extra tough flex section will never collapse internally
  • Complete Kit - includes all mounting hardware (nuts, bolts, clamps, gaskets)

High Flow Catalytic Converter (CAT)

IE’s performance downpipe includes a high-flow 200 cell per inch catalyst located as close to the turbo as possible. Our large diameter CATs allow a very large flow area and do not limit maximum power. Enjoy all the benefits and performance of a "catless" race downpipe but with reduced emissions output and no unpleasant smells.

Integrated Engineering Audi 2.0T B8 B8.5 3” Catted Downpipe (A4, A5 & Q5) ML Performance UK

Consumer Notice

By purchasing a motorsport/racing product ("Product"), you represent that you understand and agree that: the product is not designed to meet any applicable emissions standards, whether in the USA or otherwise, the product is not C.A.R.B. Compliant, and that the product is not for sale or use in California, USA nor any other jurisdiction where the sale or use is prohibited by law. Integrated Engineering, LLC makes no representations, warranties, or claims that this product complies with any applicable emissions laws and expressly disclaims any and all such representations, warranties, and claims, whether express or implied. By purchasing this product, you represent, warrant, and agree that it is your responsibility to inform yourself of any laws or regulations that may apply to your purchase and/or use of the product.





2009-2015 (B8/B8.5)




2008-2015 (B8/B8.5)




2009-2015 (B8/B8.5)




2009-2017 (8R)


Manufactured by

Integrated Engineering (IE)

Part Number


Useful Information

  • We deliver to every country in the world, if shipping rates are not available at checkout please contact us.
  • Some item(s) are not actively held in stock and usually sell out quickly, please contact sales to perform a stock check if you are unsure.
  • Full tracking is available for all orders, you will receive tracking and dispatch updates via email.
  • It can take up-to 16 working days for out of stock orders to be dispatched.
For more shipping & delivery information, please click here.
We offer fitting on most of our products at our facility in Warrington, Cheshire. Please contact us to get a quote on have us fit your products.
Ultimate Customs Group LTD do not accept any liability if damage is caused to your car by the installation of this product.

Professional installation is recommended on all of our products. Please contact us to see if we offer a fitting service for the item(s) you wish to purchase.