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Exhaust - Cat Pipe (JHM) 3" w/ High Flow Cat (HFC) for B7-A4 2.0T

SKU: JHM-B720TCatPipe


Sale Price $424.96

Introducing the JHM B7-A4 2.0T 3" Cat Pipe!!!

Finally, a no-compromise, performance-first 3" Cat Pipe for the B7-A4 2.0T!!! If you are looking to get the most performance out of your stock turbo B7-A4 2.0T, this is the cat pipe that you need!

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Audi Exhaust - Cat Pipe 3 w/ High Flow Cat (HFC) for B7-A4

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Audi Exhaust - Race Pipe 3 Catless Race Pipe for B7-A4 2.0T

We ran a catless version of this Cat Pipe in our JHM 2.0T when we set the fastest stock turbo quarter mile record: 13.38 seconds at 100.3 mph!


After the turbo on the B7-A4 2.0T there are 3 different components in the exhaust system:
- TEST PIPE or CAT PIPE (OEM Cat Pipe): This pipe is the shortest section of the exhaust system and can be seen from the top of the car. It attaches to the turbo outlet and in stock form, contains the OEM Catalytic Converter. There are two oxygen sensors located on this pipe - one right after the turbo outlet and one after cat. After the cat, this pipe bends down to connect to the next part of the exhaust system, the CAT-BACK which includes the DOWNPIPE and the REAR EXHAUST.
- DOWNPIPE: This section of the exhaust attaches to the cat pipe and runs down from that connection over the CV shaft then under the passenger side of the transmission cross-member. In the stock formation, it connects to the REAR EXHAUST via a slip fit clamp where the end of the DOWNPIPE slips over the REAR EXHAUST.
- REAR EXHAUST: This final piece of the exhaust system is connected to the back of the DOWNPIPE and in the stock configuration splits into two pipes after exiting a resonator. After the resonator, the pipes continue to go apart and then lead into a muffler on each side. At the exit of the muffler, the REAR EXHAUST ends with the tips that you can see at the back of your car. Sometimes this section of the exhaust is mistakenly called the "cat-back". On the B7-A4 2.0T, a cat-back exhaust would replace BOTH the DOWNPIPE and the REAR EXHAUST sections. Most quality exhaust manufacturers sell true "cat-back" exhausts that will bolt up to your OEM cat-pipe or your test pipe. However, we have found that a number of manufacturers making exhaust products for the B7-A4 2.0T will market a rear exhaust system as a cat-back. Use this information to make sure you know what exhaust components you are replacing.

The JHM B7-A4 2.0T 3" Cat Pipe starts with nearly a 3 and a half inch opening at the turbo outlet! The outlet on the stock K03 turbo is 3.15 inches, so if we were to go with only a 3" inch opening on the pipe, we'd already be choking off the turbo! We opened up our pipe to the OEM Turbo to Cat Pipe gasket size which is actually slightly bigger than the OEM catalytic converter inlet.

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Audi Exhaust - Race Pipe 3 Catless Race Pipe for B7-A4 2.0T

We also give our cat pipe the largest downpipe connection possible while still maintaining strength in the connecting flange. This pipe is NOT like other cat pipes out there which can neck down to the stock downpipe flange size. We make our outlet piping size as close to 3" as possible while still allowing it to hook up to whatever downpipe setup you currently have on your car. This leaves you room to grow into more powerful exhaust setups or just hook to your current stock downpipe. We maintain the stock bolt pattern but manufacture a custom flange that is opened up to receive our nearly 3" piping. Though this method **slightly** limits the size of pipe we can run at the outlet, we decided to put our piping inside the flange because it is a stronger way to build the flange connection while still allowing the test-pipe to bolt up to both stock and other downpipes on the market.

NOTE: The picture below is of the JHM Test Pipe and is used illustrate the size of the Cat Pipe to Downpipe connection featured on our JHM Cat Pipe.

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Audi Exhaust - Race Pipe 3 Catless Race Pipe for B7-A4 2.0T

The catalytic converter used in the JHM Cat Pipe is a high-quality, 300-cell, high-flow race cat. We locate it as far away from the turbo outlet as possible. While this made it a more difficult piece to fabricate and produce, we felt that it was the only way to do it since putting a restriction right against the back of the turbo would restrict airflow.

Finally, our Cat Pipe features a J-bung for the secondary oxygen sensor. We have been working with several different configurations on this piece to get just the right setup for the B7-A4 2.0T. With our J-bung, not only will you be Check Engine Light free (for catalyst efficiency codes), but because of the way we've located it on the pipe, you'll also have easy access to the secondary oxygen sensor should you ever need to replace it!

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Audi Exhaust - Race Pipe 3 Catless Race Pipe for B7-A4 2.0T

For those customers interested upgrading to our JHM 3" Cat Pipe who already have a larger downpipe (or are looking to buy our JHM Y-Adapter) we offer a no compromise gasket and hardware kit. When replacing your OEM cat pipe with our JHM Cat Pipe, you'll most likely need to replace the gasket at the cat-pipe to downpipe connection. Most companies just provide a stock gasket for this connection which has an inner diameter of ONLY 2.3". Not only is the JHM gasket that we include in our hardware kit made out of aluminum but it also features an inner diameter of 2.8" - the largest possible diameter while still maintaining the stock bolt pattern. To purchase this hardware kit, please go back one section and add the item to your cart. You can also search for "JHM 2.0T Hardware Kit" in the search box on the top, right-hand corner on any page on our website.

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Audi Hardware Kit for B7-A4 2.0T Cat Pipe or Race Pipe

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This product fits the following vehicles:
Make Model Chassis Engine
Audi A4 B7 (2005.5-2009) 2.0t FSI
Customer Reviews (3)
Excellent fit and finish! Great looking HFC, beautiful welds! Installed perfectly, no CEL, hardware kit was an excellent addition. I feel my car has been juiced up with a little extra power, especially in the higher RPM range of 3-5k RPM. Its definitely been "woken up". Turbo lag is basically gone. Yet this is a very stealthy addition, my wife didnt even hear a difference. So to you guys out there that have an exhaust noise limitation imposed by your "better half", this is the pipe for you! Great deeper undertones under WOT, and a very subdued tone during normal driving. Review by Kyle (Posted on 1/30/2017)
I get tons of compliments on the sound of my exhaust people can't believe it's still factory stock with only a test pipe. Love the sound, performance and finish look after installation. The installation kit is great and makes install much nicer. I rant and rave about this test pipe all the time. Review by Sean (Posted on 10/24/2015)
I just have to say, it's worth every penny! You can actually hear the Turbo spool when you rev it idle or a stop, and it just is a lot more aggressive and gives you a bit of that good old gas smell without being overwhelming. With that and a Revo Tune, while on stock tires without any other mods besides mounts, got a 0-60 of 5.5, compared to 7.2 from C&D.

You definitely owe it to yourself to get this ASAP
Review by Mike (Posted on 7/11/2014)
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Off-road Use

By Purchasing any Off-Road use ONLY products from JH Motorsports, Inc. I acknowledge and understand the following disclosure. (This notice is located at the bottom of the page description of affected products on our website.)

Vehicle Code § 27156:
(b) No person shall operate or leave standing upon a highway a motor vehicle that is required to be equipped with a motor vehicle pollution control device under Part 5 (commencing with Section 43000) of Division 26 of the Health and Safety Code or any other certified motor vehicle pollution control device required by any other state law or any rule or regulation adopted pursuant to that law, or required to be equipped with a motor vehicle pollution control device pursuant to the National Emission Standards Act (42 U.S.C. Secs. 7521 to 7550, inclusive) and the standards and regulations adopted pursuant to that federal act, unless the motor vehicle is equipped with the required motor vehicle pollution control device that is correctly installed and in operating condition. No person shall disconnect, modify, or alter any such required device.
(c) No person shall install, sell, offer for sale, or advertise any device, apparatus, or mechanism intended for use with, or as a part of, a required motor vehicle pollution control device or system that alters or modifies the original design or performance of the motor vehicle pollution control device or system.

Health and Safety Code § 43000:
43001. The provisions of this part shall not apply to:
(a) Racing vehicles.

As the aforementioned code sections outline, it is against the law to operate or use a vehicle on public streets or highways with modified, altered, or disconnected motor vehicle pollution control devices. This may include but is not limited to, Evaporative Fuel Controls, Catalysts, DPF, PTOX, PCV Systems, Exhaust Gas Recirculation Systems, Oxygen Sensors, Thermostatic Air Cleaners, Air Intake Systems, Fuel Injectors, Regulators, Adjustable Cam Gears, ECU Programming, Mapping, or other Computer Modifications. Air Pumps, Air Injection, Timing, and any other Emission System Modification(s).

Purchaser acknowledges and certifies to JH Motorsports Inc., that Purchasers vehicle will only be used for racing applications or off road vehicle use only. Purchaser requests these modifications for the purpose of enhancing the vehicle for competitive Racing Applications and will not use this vehicle on public streets or highways. Purchaser agrees to indemnify JH Motorsports Inc., all employees, officers, owners, and subsidiaries for any civil or criminal liability arising out of use of Purchasers vehicle on public streets or highways as Purchaser has been duly notified of the laws and regulations regarding disconnecting, alteration, or modification of a vehicle’s pollution control devices. Purchaser understands and has been advised the driving of a vehicle on public streets or highways could result in criminal or civil penalties.

Prop 65

Warning: This product may contain a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm.

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