FYI.....Here is what Ken had to say..."The chipset you have will work with stock cats or an X-pipe with the stock mid-exhaust and rear muffler or RMB.
If you go with a big custom rear exhaust too, EG dual 2.5" all the way back,
I recommend getting the WOTpot, so the WOT mixture can be adjusted
(richened) to suit."