For a while (2.5 years) I had Rush 2" baloney cuts on my phatboy, the sound and power rocked. I also had stage one done at the same time, SERT, air cleaner and dyno'd. I hit 75 horses with this setup. I highly recomend their products. The only reason I no longer sport them is I wanted tru duals. Man, did I lose the horsies when I did that. Still have the Rush if anyone wants them.