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I understand the drilling and tapping if you get log tubes w/o the bungs but if you're gutting the cats (which no one would ever do ) because you need to appear stock. Who knows.
I just thought it was interesting the idea. I haven't tried it nor an I ready anytime in the near future.
Last edited by kringer; Feb 12, 2007 at 10:38 PM.
Reason: spelling
This is a really old trick. It was widely used on turbo cars not to burn the O2 sensor and at the same time, because the exhaust sample is "cleaner" due to the sensor beging away from the stream, it will give similar readings as if it had a cat.
This is a really old trick. It was widely used on turbo cars not to burn the O2 sensor and at the same time, because the exhaust sample is "cleaner" due to the sensor beging away from the stream, it will give similar readings as if it had a cat.
Have a buddy who just did it to a WRX STi with a high flow cat. His CEL was coming on and it was setting codes, but everything is fine now.