And just for the record, Akrapovic are no more than a "name" these days - back in my motorcycle days the Akro exhausts where the dogs bollocks at a price, these days they are just another option but still have the "price".
Having gone through more header/midpipe/muffler combos on the C5 than most small countries have TV stations I realized after you do you engine mods and pick a performance exhaust setup, they are all the same