Race Spec 4 Port PWM Boost Control Solenoid

4 port MAC Boost Control Solenoid Valve Kit.  Includes the solenoid, a breather fitting 1/8" npt and 3 barbed fittings for 5/16" silicone hose with 1/8" npt fittings. *** IN STOCK ***  For use in any ECU that can control boost with a PWM output.  The following list of ECUs can do this, but refer to your ECU for compatibility. Hondata S300 Hondata K-Pro Hondata FlashPro 2006-11 Civic Si Hondata FlashPro S2000 Hondata FlashPro 07/08 TSX HTS/eCtune Honda OBD1 ECUs Neptune Demon Motec AEM Haltech Race Spec 4 port boost Solenoid utilizes the top and bottom of your waste-gate diaphragm. It allows you to use a much lower waste-gate spring pressure for better low gear boost control and better high gear, high boost settings. Up to 5x the amount of boost when using a 10 lb waste-gate spring (varies based on turbo system design and engine efficiency) Better control which equals more power More accurate duty cycle control 4 port boost control solenoids are designed for use in high boost applications, but will work just as great in low boost applications. It is normally closed so that on failure you will run off the waste-gate spring. It uses 1/8th NPT fittings. If you are upgrading from a 3 port solenoid, the boost control tables will need re-tuning.