imho the few horses you get from deleteing the primary cat is not enough for the constant changes back to stock for emissions, smells, etc. it not like you already use all your 414 horses anyway
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if i were doing exhaust i would leave the primary on and get a slip on from there that would just delete the 2nd cat and resonator followed by connecting and muffler. more then enough for me and i don't have to worry about smell or passing emissions, this alone is priceless.
i would either get the aa stubbies with aa xpipe and a connecting and a muffler or the challenge slip on followed by connecting and muffler.