I have a Bassani 2/1 on my 04 HD Road King. While it does sound good, a Rush Wrath 2/1, which I have on my 14 HD Limited sounds way better. I am recently reformed Indian owner. Anyway, I am waiting for a 2/1 for the Challenger to come out. If you are offended by my HD pics to bad. The trick to a 2/1 is equal length headers. Some may argue that it not necessary, but I believe it is the best option.