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Hey guys, I want to do a complete exhaust for my V6, for the mid-pipe I want to delete all 4 cats and put 2 hi-flow cats in. What do I do with the other remaining O2 Sensors? And when I get the cats right I want to cut that Y pipe and put in a H pipe, then order some Flowmaster GT catback system. Will all of this work? Any input would help a ton. Thanks.