Holy crap this freakin works! I took it for a spin and I have no hesitation in either 5.5psi or 9psi. But I still am gonna get a whole new fuel management system, cause in 9psi the car stubles at high rpms because I beleve the car ISN'T getting enough gas, I don't know if it's the fuel pump or injectors that are the problem though, I'll probably replace both.