I used to be a dealer for them. Very high quality product. Most of my customers were Triumph and R1's. The are VERY deep and loud. The only exhaust I can say they sound like is a Remus. Most people don't know them either. That said, for my personal bike, it would be wolf, remus or hindle. Thats it, thats the list. Anyway, jighly recomended. Good luck. Joe