3 Port Boost Control Solenoid.
As supplied with GFB electronic boost controllers G-Force II (3004), G-Force III (3005), and D-Force (3006 & 3007).
MAC 35 series are the go-to solenoid valve for automotive boost control due to their exceptionally rugged and reliable design. Features waterproof female connector, 1/8″ BSP threads, and includes two 7mm hose tails.