first off definently dont get the tornado thing, huge waste of money, there have been many proven studies that it resrticts air. as for your question for better gas free air up. get an air filter, you wont need to do the whole cai just get a k&n filter, bigger headers, wider downpipe and exhaust. then have it tuned. also new plugs. or you can just get a car. these gas prices arnt going any lower just gonna stay at a steady increase. my lude is close to 40 bucks a week i can only imagine what youre paying for gas. fuc.king bush.