well i already have long tube headers and a ypipe, so i was going to get a "cat back" even though i dont actually have a cat but you get my point.i was going to go with a magnaflow cat back, but i wanted to use a slp loudmouth bullet resonator in place of the muffler, but im not sure how i would do this since the magnaflow or any oem muffler is single inlet and dual outlet, while the slp buller is single in single out, how would i do this ?