eB2 60psi 60mm Sleeper - 4 PortTurbosmart eBoost2 4 Port is delivered with a 4 Port Solenoid for a wider tuning Window and more tuning options! Turbosmart eBoost2 allows the user to control, monitor, map and compensate boost. But eBoost2 is more than just a boost controller it can also control water spray, methanol or nitrous injection, manage shift warning lights and read monitor RPM. The eBoost2 has been effectively controlling up to six stages of boost by gear, boost by rpm,