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new catback exhaust. CEL came on. new catback exhaust. CEL came on.
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Old 04-12-2019, 07:25 PM   #1
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will not know till tomorrow. But the exhaust system is a complete muffler delete on 2 1/2" pipe. So basically no back pressure other than the CATS.
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Old 04-13-2019, 12:00 PM   #2
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if you removed the cats completely, you might need mini cats for your down stream O2 sensors.

Something like these https://www.fvd.net/us-en/FVD111LAMSIM/oxygen-sensor-simulator-minicat-sold-individually.html

You don't have to get those exact ones, there are cheaper versions all over ebay and Summit Racing. I myself used the FVD because I ordered thier muffler as well at that time.
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