3 port solenoid valve for boost control with either internal or external wastegate systems. When using with the stock turbo Buick V6 ECM the boost can be raised much more than the stock solenoid allows, be sure you are using a system that lets you adjust the boost PWM signal. The solenoid comes with nipples and exhaust muffler/filter. For those installations controlling the balance pressure of an external wastegate using pressure feedback (i.e. CO2), 2 solenoids are required. Optionally the solenoid can be purchased with a connector installed.