3 Port Boost Solenoid & Loom WRX 1992 - 1996The Fuji Racing 3 Port Boost Solenoid Kit uses the same Pierburg solenoid unit used by Prodrive in their own 3 port boost solenoid kit found on the WR1 model, this kit allows you to raise the cars boost level beyond factory parameters whilst retaining control and improving turbo response. May require a remap to ECU map following fitment Fuji Racing 3 Port Boost Solenoid is an excellent upgrade for modern turbocharged vehicles, enabling precise boost