i could believe the 400
figure stock an h22a makes 200 hp at the crank.
then figure a stock motor makes about 10hp per psi when tuned...at 10psi he makes 100 extra hp...but then lets add in teh fact he has cams that are turbo grinds, an intake manifold designed for turbo, and a ported pro series head from JG, oversized valves, a huge throttle body, and stand alone engine management. then add in all the little bolt ons and if tuned by someone who knows what they are doing....i can see 400 crank hp.....plus that is a hUGE turbo. i am willing to bet he put down like 375 to the ground with all that he has on there at 10psi.....