Removing the restrictor piece under the filter and the hose from the fender to the airbox will get you a lot more sound. I've had mine like that for 2 years and no problems. Not much for power, but mine got a lot better throttle response. MABYE a little more power in the high end. BTW, the plastic piece under the filter will just snap off, just give it a good pull and it comes off. It will snap back in if for some reason you want to put it back in.
