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Ok, so I'm making a 3" downpipe for my 04' 93 and I was wondering if there was any proven way to trick the ecu into thinking there is a cat inline if I do not use one. I know there are extensions that take the second sensor out of the direct flow of the exhaust, but I also know it does not always work.

If the answer is no, I'm just going to get a high flow cat. Then the other question is, do I need to do any sort of computer upgrade going to a 3" DP? I know I won't see much in gains unless I do a chip, but I want to be sure that T8 won't freak out on me until then.

Thanks in advance!
 

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I know Trionic 7 can, but not sure about 8.
 
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