Cutouts before the Cats?
the rear o2 sensors will detect that the flow is no longer there and throw codes..... i would just put one after the cats in the I pipe.
i think it could be a waste of money to add 2 to a stock Y pipe when later on your are likely to replace it with a better system
get a QTEC cutout..they are awesome!
Two cutouts before the cats would mean that would have to relocate the cats further down stream to have enough room and would require the use of O2 simms. The gains of that over a single cutout farther downstream would probably not be worth the effort/expense.
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