my friend installed a white brothers on a 660 rapter, and it sound AWESOME!!! I have a 500 honda rubicon and know there is a big difference in quads but i want something that will help my performance but something that sounds great. I like the deep nrumble sound and the way other bikes ecco through the hills and keep you looking to see whats makeing that loud deep rumble. any one have any ideas for my 500???