talk to billy holt at wrh racing, he will treat you right. i have his pipe on my sons 90 and it flys. to go with the pipe you will need to rejet the carb and billy will probaly advise you to add new clutch springs and variator rollers to get the full benifit of the pipe. after these mods tell your boy to hold on. my sons 90 will pull straight up and throw me off the back. good luck.
2004 eton Viper Exhaust Kit's
