NEW IE Cast Downpipes for Audi B9 A4 & A5!

IE Cast Downpipe for Audi B9 A4 is Available and Shipping Now!

The latest addition to IE’s downpipe lineup adds coverage for the B9 A4, A5, and Allroad. The IE Cast Downpipe will help you get the most out of your stage 2 tune or tuning box, by adding upwards of 20 HP/TQ. Larger diameter 304 stainless steel tubing replaces the restrictive factory downpipe and mates to your stock exhaust system. Install is quick and easy and can be done in a few hours.

Product Videos

  • Product Overview Video:
  • Product Sound Comparison:
  • Product Install Video:


  • Cast bend section maximizes flow and looks even better
  • Impressive power gains of over 20HP/TQ on a tuned car
  • Large diameter metal matrix 200 cell high-flow catalytic converter
  • 304 stainless steel and tig welding make for a long-lasting product
  • Lined flex section is sure not to blow out and cause restrictions like cheaper flex sections
  • Resonated midsection to reduce highway drone
  • Direct bolt-on fitment. No welding or cutting required!
  • 3 inch (76mm) tubing replaces restrictive 2.25 inch (60mm) factory tubing

Confirmed Fitments

  • B9 Audi A4 (2017+)
  • B9 Audi A5 (2017+)
  • B9 Audi Allroad

Pricing & Additional Info

  • $749.99 USD
  • IE Part Number: IEEXCK1

Contact Information

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About IE

Integrated Engineering (IE) is a family-owned performance part manufacturer for all VW and Audi models. Our goal is to make automotive enthusiasts’ dreams become reality by providing the best products money can buy.

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