I am extremely satisfied with my dinan muffler....fit, finish, sound is not too intrusive but just right for me.  On a scale of 1-10, I would say if the stock muffler is a 5 when it comes to loudness.  The Dinan muffler is about a 6.5.  I wish i had a sound clip for you so you could hear.  There is a website that will give clips for most exhausts but i dont recall off hand what that site is.