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Old 06-04-2002, 06:13 PM
Cap'n Carageous Cap'n Carageous is offline
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Join Date: Aug 2001
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Question Gutting a cat, What are the disadvantages?

I know that gutting pre cats opens up the exhaust to flow better, but the O2 sensor is downstream from my pre cats on the M103. Will "opening" them up have any adverse effect on the signal to the O2 and ultimately the ECU?
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