Integrated Engineering

IE B8 & B8.5 S4 Performance Downpipes - IEEXCG2

IE B8 & B8.5 S4 Performance Downpipes - IEEXCG2

Regular price $699.99 USD
Regular price Sale price $699.99 USD
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IE downpipes for the B8/B8.5 S4/S5 & 8R Q5/SQ5 are an easy and fast way to add horsepower and an aggressive sound. Give your 3.0T powerplant a demanding motorsport sound. Superior engineering and quality craftsmanship ensure a long lasting and great performing exhaust.


  • Deleting two resonators creates a deep and assertive exhaust note
  • Horsepower gains of 8-12 HP
  • Constructed from 304 stainless steel 2.5 inch (65mm) diameter tubing
  • Easy to install - do it at home with minimal tools
  • Tig welded, high quality, and long lasting
  • Fully lined flex section - will never collapse and supercharger approved
  • Includes all hardware and clamps needed for a hassle-free install




Downpipes are a popular and easy mod to install. As a pair, they replace roughly 12 feet of factory tubing and a pair of resonators. This frees up the exhaust system, making the engine sound as it should. On the B8 S4, the downpipes are located after the catalysts and before the center muffler. Due to the copious amount of exhaust on the B8 S4 we have made the following diagram to simplify the system.


Increasing the tubing size and deleting two sound muffling resonators results in noteworthy gains of8-12 horsepower and torque (ft-lb). Larger gains may be realized on more aggressive setups such as stage 2 or stage 3 vehicles.


304 Stainless steel tubing and tig welding make for a long-lasting and worry-free product. High quality lined flex sections will never come apart internally and clog your exhaust like inferior flex sections. Especially in forced induction (supercharged or turbo), economy flex sections are bound to fail and cause performance issues.


No welder or sawzall required! Its sad that we even have to mention this, but its a fact that many cheaper products often require modification to be installed. For a hassle-freeinstall, go with IE who stands behind their products.


One of the greatest features of IE downpipes is that they are a breeze to install. They can be done with minimal tools in your garage (or driveway) on jack stands. Feel free to view our install guideHERE.

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