HR1 is an exhaust where you can customize the color of the tip and the body. The torquehammer is horribly ugly. Stay away from the free spirits! as it doesn't fit properly and have TERRIBLE customer service, and theres a write up on here somewhere about it. Jardine is pretty good and relatively inexpensive. The slip on that D&D makes for our bikes is the loudest pipe they produce, thats what I heard anyway. Youtube has quite a few custom pipes, hit those guys up if you like what you see and you can proli get one made. Thats all I got so good luck