Integrated Engineering ProCore Downpipe - Audi B9 S4/S5

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Integrated EngineeringSKU: IEEXCK6 DIY Difficulty: INTERMEDIATE


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The IE ProCore Downpipe for your Audi B9 S4 or S5 delivers an improved exhaust note and increased flow. Our in-house engineered 6" 400CPSI catalytic converter channels substantial flow to support upgraded engine tunes and larger turbochargers. The specialty tri-core design and precious metal coatings align with ECU emissions requirements so that you can upgrade without the check engine light.

IE's in-house engineered ProCore Catalyst features our own tri-core design with a specialized coating, enabling it to pass vehicle readiness monitors without triggering a check engine light. An advanced molecular bonded wash process applies the precious metal coatings to ensure long-life reliability. Whether you're looking to improve the exhaust note from your 3.0T or building a track-destroying hybrid turbo setup, enjoy your exhaust without the annoying check engine light.


  • IE ProCore catalyst -No check engine light
  • High-flow design -Supports hybrid & large turbo power
  • Increases sound -Full and enriched exhaust note
  • Bolt-on direct fit -No cutting, no welding, no hassle
  • High quality -Stainless steel, TIG welded, & investment casting

What's Included:

  • Integrated Engineering ProCore Downpipe

Vehicle Fitment

Model   + Drivetrain  
B9 S4 3.0T V6
B9 S5 3.0T V6

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