Hasso, I am running some I had sent to 605 and he modded for me. I like them better than any I had heard. Was running the short TORS. I listened to about every different pipe made for our bikes before choosing.Deep mellow sound but will sound off when u get on the throttle. He is a nice guy, talked to him about 6 times before sending him pipes. I was a pain in the butt being choosy, but hey isn't everyone about their bike? lol I have had good experience with 605 pipes