idk....
from one who has tryed everything !!!
if you want it to sound like a v8 - trade it in it will never happen,...
i have tryed no cats, stright pipes, no res, res, all diff types of mufflers x-pipes, h pipes 10 or 11 diff setups and i just cut it off again.....
the best sound that i had was - stock manifolds, deleted rear cat's magnaflow muffler, and the rear res still there on a 2.5" pipe
just my .02$
Ditto!
I ended up with full cat delete, and a MagnaFlow.