I know my ls2 in my 06 vette puts 568 at the wheels with a 150 wet shot. Thats with a custom nitrous cam, FAST 102 intake, Nick Williams 102 throttle body, Kooks 1 7/8" headers and cutouts. Professionally tuned by RPM in North Carolina. Looking at the specs of engine in buggy..... im gona say that its 500hp at the flywheel max. Which makes me question the rest of the buggy. I would have a hard time buying it sight unseen. Maybe someone in the area can check it out. If not im pretty sure that the buggy that the rental buggy Travis Lovette raced at Windrock this weekend is for sale for $30k.... maybe a little cheaper now after the roll though. Lol. Its a proven buggy that takes a beating