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JHM 3" Cat-Pipe w/ High Flow Cat, HFC, for B8 and B8.5 Audi A4, A5, Q5, Allroad 2.0TFSI

This is a Race-only product. By adding this product to your shopping cart, you are electronically acknowledging that this product is not to be installed on any registered vehicle that will be driven on any US road, street or highway. In addition, you also acknowledge that the use or installation of this product outside of the intended closed circuit racing purpose may be illegal under the Federal Clean Air Act (42 U.S.C. § 7522(A)(3))

To purchase this product, you must fill out and e-mail the form at the link below to We cannot ship this product to you without a completed form.
Track Car Modification Waiver Form

This product ships directly from our supplier.


Introducing the JHM 3" HFC Cat Pipe for the Audi B8 2.0T!!!

Following the success of our performance exhaust components for the B7-A4 2.0T, JHM is proud to release their Cat Pipe for the B8 A4-A5 with the 2.0T motor. If you are looking to get the most performance out of your stock turbo B8 A4 or A5 2.0T while still running a catalyst, this is the cat pipe that you need!

While the OEM cat-pipe on the B8 A4-A5 2.0T is larger than previous generation OEM Audi cat-pipes, it is still a major restriction in the exhaust system. The first restriction in the OEM cat-pipe is the huge catalyst sitting right behind the turbo. The second major restriction is the diameter of the pipe. After the inlet at the turbo, the largest the pipe ever gets is 2.5 inches at the outlet at the end of the pipe. In many spots, the OEM cat-pipe is as small as 2.25 inches or smaller. Additionally, the OEM pipe has severe bends and dimpling in it for clearancing that are disruptive to the smooth flow of exhaust gases out of the motor.
Replacing your OEM cat-pipe with our JHM 3 inch Cat Pipe alleviates all of these concerns. See the picture below comparing the OEM cat-pipe to our JHM 3 inch Cat Pipe:

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Brand JHM
Stock Type N/A
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