(tinmann @ Sep. 08 2006,06:59) Your best bang for the buck would be a full system , PCIII usb , a pair valve block off kit and 16/42 gearing . Also do the small airbox mod and get a BMC race filter . Whatever exhaust you get stay away from the stainlees steel finish . Go with a titanium or carbon fiber finish. Trust me on this one . Akropovic , Brock Hindle, TiForce, HMF are top of the line exhaust and you'll be happy with either one . Yosh on a budget but its better than stock and will give you good gains along with the other mods.
I'm still waiting for someone to explain the Water Pump Mod and the Oil Cooler Removal Mod to me