about as much as my strobe lights, but u know what? THEY LOOK DANG GOOD!! each to there own, i would NEVER spend that much money for something that will do you no good. and for the exhaust, most is for sound and little HP,SquirrelNutz154 said:I know its not the most cost effective way to make gains. I didn't do it solely to make gains. I did it because I like it. How much HP do you get out of your ghost flames?