my 1987 325ic just failed inspection for a hole in the muffler (yeah germany) and i have decided to use a muffler and two canister cats i had in the basement. the muffler is a dual 2 1/2 in and outlet super 44 and the cats are magnaflow high flow canisters. im hoping to run duel 2 1/2 pipes back from the manifolds. any thoughts or opinions on this kind of setup.