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The oxygen sensors are before the catalytic converter...there will not ever be a problem with removing the cat and it causing a check engine light.. it monitors oxygen in the exhaust gas before the catalytic converter not after... so remove away...you will never see a light for removing it... ever ever ever... just wanted to make sure I did not leave any room for doubt.... :)

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what he said. i have been running with my stock cat hollowed out for almost a year. never a light for me.
 
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