You have two pipes coming from the engine right, where you dropped the middle cat put in a dual in dual out muffler, not only does it sound great - feels awesome too!!!! (I think Rich mentioned this in your prev. thread). Not sure what the muff you put in is so don't know if it wold be better than a 2n2out . also - you said you took off the two muff's, did you replace it with the same size pipe from there out? You could have cut further back and got wider, that would have helped since I am guessing you put pipe where the muffs were (and minimual $ since you had to replace the pipe anyway....., uhhhh, did you...or did you put the tips at the end of the cut (not being smart, but you knever know! ...got pics?). Dunno if any one mentioned hooking up a cold open air box. and yes lobbin off the "lung" is a pain, it will ever so slightly create more sound (props to Roadboss for mine- thanks Hottie!).
Would it screw crap up if you drilled a hole in your cats? Go ahead and laugh, but a dude told me if you do it about 1/2 inch from the rim that it wouldn't mess up the cat, just make it lounder. All I know is since dude dropped my ex-sys to put in the gears my cats have ratteled like a rattle snake.
just thrown it out there
MsM8