For good or ill, that horse has left the barn long ago on a site like this. Personally, I think a catless DP does not make a lot of sense, given that you can stay smog-compliant with a 200 or 300 cell catted DP (although it is equally illegal), a catless can stink and you have to deal with a CEL (although there are work-arounds), and the hp/torque gain over the catted DP is minimal. You can get more sound out of the catless--that is basically the benefit.
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