It really has two air solenoids that can be mounted in the exact location as your factory setup. It is not necessary to install boost lines all over the vehicle to only one solenoid and worry about equal length. This boost controller is simple, reliable, solenoids are American made high quality MAC style valves with Japanese electronics. It has one button and two dials, power, balance, and boost. The balance knob you can synchronize the turbos response in the car to fine tune your turbos boost characteristics. Gain control is automatic, never had a problem with over boosting or fluctuating boost levels for three years straight.