cool thanks, yeah i was thinking about those as well. But I am wondering: i have heard that the leo vince zx (maybe the technigas too i dunno) exhaust is actually restricted with a cone inside the chamber...and ive seen video's of opening it up and sawing it off. Is this true? Is there a good exhaust i can get that is not restricted? Cuz i dont have the tools to cut up an exhaust pipe and weld it back together