O2 sensor, and Cat.

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Sep 27, 2004 | 04:41 PM

Quattroholic

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Joined: Aug 2004

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O2 sensor, and Cat.

Just wondering, if you replace your cat's w/ test tubes, what do you do w/ the sensors? Also, what is the purpose of the pre-cats, and the center muffler? Does the 2.7T require a certain amount of back pressure in the system to run properly? You see I just can't justify the exspense of an MTM, or Milltek system...Who needs stainless when your only going to have the car for ayear, or two??

Sep 28, 2004 | 04:01 AM

CTallroad

AudiWorld Member

Joined: Dec 2003

Posts: 438

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Re: O2 sensor, and Cat.

It looks to me like you can gut the cats and install this gizmo: http://www.o2simulator.com/4436.html

Regarding backpressure, the less the better for the 2.7t.