Does anyone have any good info on the Big Gun exhaust system? (Head pipe and silencers) The guys at Baja Designs can't say enough good things about the pipe combo. They seem to think it is the best for the xr650r. I have seen some negative feedback on this site, but does anyone have any good feedback. I dont want to spend a bunch of money and be disapointed, when i can just get the power up kit and have good power. Please help!!!