Cool but do you have to drill into any pipes? I guess I still don't really understand how this works... You're drilling in one of the anti-foulers, screwing that into the 2nd anti-fouler, and then screwing the o2 sensor into the 2nd fouler? Then the whole thing is screwed into the stock location??? Do you do this for o2 1 and o2 2? I'm putting a header in (obx) and will probably be doing a cat-back as well...
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