All I know is that since I put these pipes on my bike I have had alot of compliments from many people. I actualy had a Harley guy pull up next to me from behind at a stop light & tell me that he had to see what I was riding because my bike sounded & looked great. Not that I am trying to impress Harley guys, but it made me feel good. You get a good sound at idle from these pipes, but they really sound awesome at accelleration. It is all about personal preference.
