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there are few threads about relocation the O2 sensor on the 2141? do you really need to do this mod? if so where do you place it? how does that effect the ceramic coating?
Its done so that the O2 can sniff the entire left side of the engine not just the #7 cylinder.
I put my heated sensor in the "Y" pipe so I didn't mess with the coating. Since I sent the headers out to get the insides coated, if I had to do over again I'd put it in the driver collector and have them touch up the outside where the weld would be.