Ditch cannon, get yourself a decent 2.5" straight-through muffler (as long as you can physically fit in there). Twin-loop mufflers are useless IMO. Hotdogs 'smooth' your note out (definitely helps remove any raspiness that tends to happen in NA twinky engines), so keep them. Could you please explain why twinloops are useless? The amount of money they cost, you can just get yourself a better stainless muffler that will sound exactly the same. Agreed!!