SpeedFactory Racing 3-Port Boost Control Solenoid Kit - 3-Port Solenoid Only - SF-01-051The SpeedFactory Racing 3 Port Boost Control Solenoid Kit allows precise boost control with a PWM (pulsewidth modulation) signal from a source (Engine Control Module or Electronic Boost Controller). This solenoid can raise the boost level as high as 2 3 times the spring pressure of the wastegate. (For higher boost levels and better off the line boost control please see our 4 Port Boost Control Solenoid Kit). This kit can be used with single or