3" High Flow Catalytic Converter

Designed to seamlessly fit in place of factory catalytic converter
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Availability: Inventory On Order, ETA Jun 9, 2021
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Product Details

The CTS B9 A4 2.0T high flow cat is the premier high flow cat for your Audi A4 2.0T.  Their high flow cat is designed to seamlessly fit in place of your restrictive stock catalytic converter, which is situated immediately after the turbocharger.  The high flow cat features 3" stainless steel piping, smooth mandrel bends, one 02 sensor bung with an option for a second.  Substantial power gains, improved exhaust flow and a more throaty sound are the main benefits from installing this high flow cat.  Upon inspection you will notice a flare which is nearly 4", this flare then tapers to 3" and is designed to allow for optimal flow as the exhaust gas transitions from the turbocharger to the high flow cat.  In addition to being one of the best bang for the buck performance upgrades for A4 owners CTS' high flow cat is also very attractive piece.  Each 3" test pipe is mandrel bent, hand tig welded. 

Product Details:

  • T304 stainless steel construction
  • Mandrel bent stainless steel
  • Fully tig welded design
  • Optional third 02 bung
  • Install hardware included
  • Throaty sound 
  • Great power upgrade

*To remove the CEL that will occur, proper tuning software must be used*

Cross Reference
  • CTS-EXH-TP-0006-B9-CAT

This Part Fits the Following Vehicles

Make Model Submodel Engine
Audi B9 A4 FWD 2.0T
Audi B9 A4 Quattro 2.0T
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.


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Manufacturer names and/or part numbers are used only for identification purposes.

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