I've my received exhaust from vw racing. I thought I was going to be getting the single large back box type. I've got the the dual small box system!! Does this mean it will be any different in sound to the single box as it also has a middle box. Will it be quieter?? I was told it was the non-res (louder) miltek version. Ok , I don't want silly loud, but a nice tone on acceleration. Not had it fitted yet, but curious.