Home » Integrated Engineering - Catback Exhaust System For Audi B9/B9.5 S4

Integrated Engineering - Catback Exhaust System For Audi B9/B9.5 S4

  • Vendor Integrated Engineering
  • Part # IEEXCK5 | IEEXCK13
$1,687.99
In Stock
Usually ships within 1 business day
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Description Fitment Guide Installation Instructions

SAY IT LOUDLY
Your S4 should sound as mean as it looks and drives. Stock is too quiet and others add volume with rasp and drone. iE Catbacks bring a deep, aggressive roar under throttle, while DroneTrap™ helps keep the cabin comfortable. Give your Audi a voice.

CONTROLLED CHAOS
DroneTrap™ is our proprietary resonator, tuned specifically for the B9 S4 V6 to target frequencies that cause annoying cabin drone, rasp, and vibrations. Keep the roar, trap everything else.

HIT THE GYM
Look stronger, bigger, and meaner with over-sized quad slash-cut motorsport tips. No cutting or melted bumpers here, these aggressive tips fill the factory exhaust cutouts with a perfect high-end fit.

MMI OR APP - YOUR CALL
No garage-door-style remote to dig out or lose. Control your iE Valved Catback just like stock from your MMI. iE PRO pr APEX Tune Suite users can take manual control with the POWERLink app on your phone or through CarPlay at anytime.

BUILT RIGHT
Unlike cheap, thin-walled systems, iE Catbacks fit precisely and are built to handle heat and vibration. T304L stainless, hand TIG welds, boxed hangers, bridged piping, reinforced stamped resonators, and lap-joint connections help keep the system tight and sealed. Drive it hard.

BOLT IT ON
You don't need a lift or a welder. The iE Valved Catback is a true bolt-on that lines up with your factory hangers and mounts, using basic hand tools. Bolt it on in your garage then let it rip.

Let customers speak for us

from 74 reviews
(Go Fast Bits) diverter valve plus install

Installed this GFB diverter valve to eliminate the OEM plastic one all together that are prone to failing. I also spent the little more instead of rebuilding the bottom of the OEM that GFB offers but doesn’t clear all cars. BOV option (any brand) can cause car to have lights & running rich issues if not tuned asap so this was the best option for me to pair with my neuspeed intake. Plug and play harness & works great ! Can tell has less slop from day to day traffic & daily driving.

Anonymous
Good Intake for the price !

This intake sounds amazing at low rpms ! Definitely using some more gas cause it’s hard to keep foot off the throttle lol. Was a tight fit on an 2014 Audi TT Quattro S Line. Engine cover does touch against the intake tubing but fits overall pretty well.

Joey
2004 Audi TT

The side markers were very nice upgrade’s. I love them 😍

esimms
Forge intake pipe

Some slight modifications to the car and the cold air heat shield was needed but otherwise it fit great. Can really hear her breath now!

Shea Chris
Very nice!

Love my new side markers - very clean looking and unique in how they flash when turning left or right. The only suggestion I’d make is provide instructions for both installing them and for being very careful with the wire once you disconnect the old light housing Left side went in ok, but I lost the right side into the fender black hole which required me to remove the tire and unscrew most of the lining so I could find the wire!

Jon W.
CTS Turbo Downpipe

I have a 2014 Mk2 Audi TT and had this installed (still with the stock cat back) and it sounds & looks great ! This with the high flow cat gives it the no drone on the hwy and the note I needed with lite rumbles on low speeds and rpms as well. (Stage 2 tune is needed.) Pairing it with a cat back on other TT/TTS & MK5/MK6 builds will give different results of course on noise & drone. I’m happy with the price also with other options being well over thousands of dollars. I’ve had it a few hundred miles and so far so good !

Joey

Everything worked fine

Danial

Replaced my failing puddle lights with these. These were there best price I could find. They look great.

Glenn

The products was great 👍

Ketil Aalberg

They where easy to install and I hope they will do the work.😊

Ketil Aalberg
Cool lights!

They look great, give the car a quick update, are truly easy to install and operate perfectly.

Jason Rulo
Perfect fit

Exactly what I needed

Jamile RISHI

Great product! Fitment is A+

Juan
Black MK1 Audi TT Grill / Rings

Looks much better than the factory stock grill. Perfect fit. Purchased two sets just to have a spare in case something happens to the first one.

Kevin Walker
225bhp 01 roadster

Impressed, perfect fit install took 5 minutes and turbo lag is way less and the sound with forge devertor valve is awesome 👌

Bobby Fillers