Okay ive been looking at after market exhaust for a while and have seen a few that i liked and was really leaning towards the topspeed n1 becasue its only 500 bucks and has the dule 3 inch piping. It sounds really loud and aggressive but i dont really fell like being fallowed by cops constantly. SO i might just get the full exhuast with out an after market catback because the stock note sounds really good to me but indoing this would i be missing out on hp gains becasue the stock exhaust is restrictive.