^ It's always a give and take for sure you will make more power but never will be like having straight pipes, but the Idea is to have it in a way that you can swap the cat's in only for inspections and run no cats the rest of the time, It would still on you to do the extension for your O2 sensors down to sec 1 for inspections so it would work properly, at this point is all theory, I would still have to work and test this before I can know if it will work the way is suppose too
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