Ok i bought a powerdyne supercharger that has been updated with the billet propeller and kevlar belt,with a Anderson powerpipe making 10 psi or i can install the 6 psi pulley that have also with the kit..Ok my question is the car is Speed density and i know i need to put a check valve in-line of the MAP senser which way does it go anyone know?..which way flow wise i mean..lol