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CTS Turbo 1.8T Cat Pipe (02-05 A4)

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SKU: 103920

Product Details


The CTS B6 A4 1.8T high flow cat pipe is the premier cat pipe for your B6 Audi A4 1.8T.  

Their test pipe is designed to seamlessly fit in place of your restrictive stock catalytic converter, which is situated immediately after the turbocharger.  

Their test pipe features

  • Magnaflow 3" high-flow cat
  • 3" stainless steel piping
  • smooth mandrel bends,
  • two 02 sensor bungs with an option for a third. 
  • Substantial power gains,
  • improved exhaust flow and a more throaty sound are the main benefits from installing our test pipe.

Upon inspection you will notice smooth mandrel bent piping with seamless transitions from the turbocharger to the exhaust system. 

In addition to being one of the best bang for the buck performance upgrades for A4 owners our test pipe is also very attractive piece. 

Each 3" test pipe is mandrel bent and hand tig welded.

Emissions Disclaimer

  • This product is sold for off-road use only.
  • By purchasing this product, you understand this product is sold for competition use and is not legal for use in highway or street vehicles.
Product Features

  • T304 stainless steel construction
  • Mandrel bent stainless steel
  • Fully tig welded design
  • Optional third 02 bung
  • Magnaflow 3" high-flow cat
  • Install hardware included
  • Throaty sound 
  • Great power upgrade
  • 1 year limited warranty


1 year limited warranty

Merchandise is warranted by the manufacturer against defects of material or workmanship when properly installed. Any claims for damage or defects to products must be reported prior to installation. All merchandise warranties are limited to replacing or repairing any part returned to us which upon inspection, is found to be defective. Claims for labor charges, down time or any other fees incurred will not be allowed.  All CTS Turbo products are covered under a 1 year warranty against manufacturing defects.  Warranty does not cover abuse, misuse, consequential damages, normal wear and tear, improper installation, or damages resulting from racing.  Warranties only apply to the original owner.  If a product is found defective the customer will receive, at the discretion of CTS Turbo, free repair or replacement.

Fitment Guide

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Fitment Guide

Fitment Guide

Start Year End Year Make Model Submodel Cyl Lit Fuel FuelDel ASP EngDesg Notes
2002 2005 AUDI A4 BASE L4 1.8 GAS FI T AMB  
2003 2006 AUDI A4 CABRIOLET L4 1.8 GAS FI T AMB  
L4 1.8 GAS FI T AMB  

Customer Reviews

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  • TEst pipe

    Perfect! Just as expected, clean welds, and opened up my Audi a ton!

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