Xtremelow, I like the pipe overall. I had the voodoo diy before this and there is a noticeable difference in power after 3000 rpms. I do like the tone of the diy better when the bike is idling. The diy is deeper and a little quieter compared to the XXX which is a little louder and sounds more like a dragster. I just paid for a xopti tune and bought a K&N filter and am going to open up the air box, so that will be the real test.