B9 A4/A5 RACING DOWNPIPE

The IE catted downpipe is the perfect solution for those looking to add performance to their Audi B9 A4 & A5 2.0T. Expect horsepower gains as well as an aggressive sound. In addition, motorsports engineering and quality materials translate to a long-lasting and quality product. You will not be disappointed!

IE B9 A4 & A5 Performance Catted Downpipe
IE B9 A4 & A5 Performance Catted Downpipe
IE B9 A4 & A5 Performance Catted Downpipe
IE B9 A4 & A5 Performance Catted Downpipe
IE B9 A4 & A5 Performance Catted Downpipe
IE B9 A4 & A5 Performance Catted Downpipe
IE B9 A4 & A5 Performance Catted Downpipe
IE B9 A4 & A5 Performance Catted Downpipe
IE B9 A4 & A5 Performance Catted Downpipe
IE B9 A4 & A5 Performance Catted Downpipe
IE B9 A4 & A5 Performance Catted Downpipe
IE B9 A4 & A5 Performance Catted Downpipe
IE B9 A4 & A5 Performance Catted Downpipe

IE B9 A4 & A5 Performance Catted Downpipe

Rated 4.6 out of 5
Based on 7 reviews

IEEXCK1

Regular price $749.99 Save $0.00
In Stock

Free shipping in US for orders over $299

LEADING FEATURES

  • Excellent power gains with matching Stage 2 Tune
  • Cast sections ensure maximum flow
  • Stainless steel and TIG welded for a gorgeous fit and finish
  • True 76mm without necking down to OE sizing at CAT
  • High flow 200 cell CAT for full power and reduced pollutants
  • Tuned resonator keeps highway drone to a minimum
  • Direct bolt-on fitment

The IE B9 A4 & A5 Catted Downpipe is engineered to completely reduce turbocharger back pressure and increase turbo spool required for the calibrations of a stage 2 ECU tune. The combination of a performance downpipe and ECU tune together unlocks the full performance potential of your stock turbocharger and engine, delivering 97 horsepower over stock. Get ready to experience addictive power gains across the entire RPM range and an aggressive exhaust growl you are bound to love.


ADVANCED SOUND TUNING

IE engineers elected to use a resonator in the B9 A4 & A5 exhaust. The result was a much better sounding exhaust overall. The factory cat back has a very unpleasant rasp when used with a downpipe which does not have a resonator. As IE engineers are true enthusiasts as well, it was very important that the exhaust also sounded great. Check out the video to hear stock vs. IE sound clips.

*All sound clips are on a Stage 2 vehicle with IE cold air intake and intercooler installed. Only the downpipe was changed, no modifications were made to the factory installed catback.

HIGH-FLOW CATALYST

IE’s performance downpipe includes a high-flow 200 cell per inch metal matrix catalyst located as close to the turbo as possible. Metal matrix catalysts are higher performance because the matrix web is thinner, allowing higher flow in the same size. Our catalyst is also a very large diameter, allowing a large flow area and maximum power. By being placed close to the turbo, emissions and unwanted unpleasant smells are greatly reduced.

QUALITY CAST SECTIONS

Typical aftermarket downpipes use bends or cuts to form the shape of the downpipe; this allows the use of larger piping, but sacrifices flow and often times fitment. Using specialized 3D scanners and software, IE engineers can design odd shapes and sizes to maximize flow and conform into tight spaces without any sacrifices. To accomplish these shapes, sections of the dowpipe are cast manufactured from the digital models. The result is an incredibly high-quality performance unit with a perfect fit and beautiful finish.

All IE exhaust systems are designed in-house using state of the art digital scanning for a perfect fit and manufactured from thick wall 304 stainless steel offering a lifetime of performance and fun.

INSTALLATION

The IE downpipe replaces over 6 feet of restrictive factory exhaust tubing, all the way back to the OE “Cat-Back” rear section. Install your new downpipe kit without welding, cutting, permanent modifications, or installation hassles. Installation should be completed by a professional and preferably on an auto lift.

Install time around 3-4 hours

VEHICLE FITMENT

MAKE MODEL YEAR ENGINE

AUDI

A4

2017-2024 (B9)

2.0T

AUDI

A5

2017-2024 (B9)

2.0T

AUDI

Allroad

2017-2024 (B9)

2.0T


CONSUMER NOTICE: BY PURCHASING A MOTORSPORT/RACING PRODUCT ("PRODUCT"), YOU REPRESENT THAT YOU UNDERSTAND AND AGREE THAT: THE PRODUCT IS NOT DESIGNED TO MEET ANY APPLICABLE EMISSIONS STANDARDS, WHETHER IN THE USA OR OTHERWISE, THE PRODUCT IS NOT C.A.R.B. COMPLIANT, AND THAT THE PRODUCT IS NOT FOR SALE OR USE IN CALIFORNIA, USA NOR ANY OTHER JURISDICTION WHERE THE SALE OR USE IS PROHIBITED BY LAW. INTEGRATED ENGINEERING, LLC MAKES NO REPRESENTATIONS, WARRANTIES, OR CLAIMS THAT THIS PRODUCT COMPLIES WITH ANY APPLICABLE EMISSIONS LAWS AND EXPRESSLY DISCLAIMS ANY AND ALL SUCH REPRESENTATIONS, WARRANTIES, AND CLAIMS, WHETHER EXPRESS OR IMPLIED. BY PURCHASING THIS PRODUCT, YOU REPRESENT, WARRANT, AND AGREE THAT IT IS YOUR RESPONSIBILITY TO INFORM YOURSELF OF ANY LAWS OR REGULATIONS THAT MAY APPLY TO YOUR PURCHASE AND/OR USE OF THE PRODUCT.


average rating 4.6 out of 5
Based on 7 reviews
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86% of reviewers would recommend this product to a friend
Fitment
Rated 5 out of 5
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Rated 5 out of 5
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Rated 4 out of 5
Customer photos and videos
7 Reviews
Reviewed by Justin
Verified Reviewer
I recommend this product
Rated 5 out of 5
Review posted

Great system

I've been very happy with this system. I was really hoping to avoid drone and was happy to find that there was none on my B9 A4 with this system. 100% agreed with one of the other reviews - it's far easier to remove the CAT from above. The pieces all fit very nicely together, match up perfectly to the stock parts and look great. I think that the sound is definitely a subjective matter. It's a 4cyl and sounds like one - it'll never sound like a 6 or an 8, nor was I expecting it to. Startup sounds nice and under easy driving it stays quiet below 2,500rpm. Push it and it'll open up with a nice rasp as the RPMs come down. This is more apparent in auto and sport mode, and even moreso of course in manual mode. But drive it easy and it's relatively unassuming.

When I installed this system I had already tuned my car with a stage I ECU and stage II TCU tune from Unitronic (sorry IE!) plus all the other necessary components for a stage II tune. After installing this system I had no CELs with the stage I tune. Neither did I of course with stage II (also Unitronic). I'm not a mechanic and had help installing, took about 5 hours with the car on jack stands.

I spent a lot of time researching different products and I am very happy with this system.

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Reviewed by Alexander M.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Nice sound.

Little bit of pain but it’s worth it I’m happy with it. Nice sound.

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Reviewed by Tim W.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Excellent Product

Excellent product, instructions were great and easy to install!

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Reviewed by Scott S.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Performance Cat back exhaust

I have been working on cars for 50 years. I have installed so many aftermarket parts on cars, and this was one of the easiest, everything, just fit perfectly! The installation instructions were very informative. I was able to remove the header pipe and the cat to the manifold from the rear of the engine compartment. So i didn't need to use a long extension from underneath the car, and I didn't need to lower the transmission. Excellent system, well worth the money. With the exhaust system and the intercooler, I was able to unleash the stage 2 tune. This this is now a rocket and it sounds great. Love the exhaust, when you get on it it sounds like a race car, but when you are cruising at hwy speeds it quite. Thank you integrated engineering.

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Reviewed by Joshua F.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Unleash the beast

I had the IE intake and IE stage 1 flash. That alone was awesome. This just brings it all together nicely. Sounds awesome, when I want it, and nice while I cruise along. It really lets the turbo do its thing more effectively. Slight gargle when coming to a stop. Nothing overwhelming just nice, like it’s a true performance car. I love the products from IE and will keep purchasing as they come out for my vehicle.

2019 A4

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