Product Features

IE B8 & B8.5 S4 Performance Downpipes

In Stock


IE downpipes for the B8 S4 are an easy and fast way to add horsepower and an aggressive sound. Don’t let your 3.0T powerplant be forgotten under the hood. Superior engineering and quality craftsmanship ensure a long lasting and great performing exhaust.

Product Summary


  • 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 copious amount of exhaust on the B8 S4 we have made the following diagram to simplify the system.

B8 S4 Exhaust System


Increasing the tubing size and deleting two sound muffling resonators results in noteworthy gains of 8-12 horsepower and torque (ft lb). Larger gains may be realized on more aggressive setups such as stage 2 or stage 3 vehicles.



From the factory the B8 S4 is muffled and resonated to death. In its stock state the car is so quiet that it’s possible to forget about the performance minded 3.0T powerplant. By removing the two resonators the engine sound comes to life. If you’re a true enthusiast that loves a deep and throaty exhaust note, you will not be disappointed!



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! It’s sad that we even have to mention this, but it’s a fact that many cheaper products often require modification to be installed. For a hassle free install, 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 guide HERE.



Power charts


 *Power figures are on IE dual pulley and tuned S4 cars. Power measured at the hub performed on a hub dynamometer, power figures are taken from multiple vehicles. Power gains may differ from advertised as individual vehicles will vary in maintenance, mileage, and conditions. HP=horsepower, TQ= Torque ft-lbs.

B8 S4 Downpipe Power Results

B8 S4 Downpipe Power Gains



  • Audi - S4 2009-2015 (B8 - B8.5) 3.0T
  • Audi - S5 2008-2015 (B8 - B8.5) 3.0T
  • Audi - SQ5 2008-2015 (8R) 3.0T
Share your thoughts on this product Write a review
Read Full Review
IE downpipes 2014 S4
Been a few weeks since the install. The pipes look great and sound even better! Paired with the IE CAI my SR sounds like it should of from the factory. Can’t wait to get the Stage 2 tune. Keep up the great work guys! Looking forward to the ultra charger as well!
Read Full Review
Great sound!
My current setup is a resonator delete and these downpipes and man oh man how good it sounds!!
Write Your Own Review

You're reviewing: IE B8 & B8.5 S4 Performance Downpipes

How do you rate this product? *

 1 star2 stars3 stars4 stars5 stars
Product rating
Customers Who Bought This Item Also Bought
Need Some Sticker power? X

Get IE sticker-charged.

fill the required field below and we will send you a free high-quality color UV laminated IE sticker.

fill the required field below and we will send you a free high-quality color UV laminated IE sticker.fill the required field below and we will send you a free high-quality color UV laminated IE sticker.

fill the required field below and we will send you a free high-quality color UV laminated IE sticker.

By submitting your Email address you are signing up for the IE Mailing list. you may opt out at any time.