I am more then impressed with the note i get from my exhaust but i will admit that it does droan a lot around 100kmph but i dont do that speed to often and iv got muddies so they humm away and send vibrations through the car a little as well but im young and can put up with it!
When i start him up and hear the whistle at idle i know iv done the right thing!
Each to there own, but i will admit if i was going to use it for a round Aus trip i would with out hesitation fit the mufflers.

