pressure and actuates the valve to a switched power source. This way it will go on when the car is turned on. The valve (the unit that fits between the hoses from manifold to wastegate actuators) needs be disabled (powerwise) if safety boost is ordered by the ECU. To accomplish this you must power it from the ciruit that feeds the boost solenoid on the one side of the car. Plug off the side you do not use. I don't remember if the BSs are always powered and are turned off to achieve safet boost or if vice versa. If vice versa you will need a relay to act as intermediary. PM me for more details.