Korsh 3 Port MAC Solenoid - Subaru WRX / STI 01-07 / Forester SG XT

Korsh 3 Port MAC Solenoid - Subaru WRX / STI 01-07 / Forester SG XT

Application: Subaru WRX and STI 2001–2007, Forester SG XT 2003–2008
Part Type: 3-port electronic boost control solenoid
Part Number: KOR-3PS-01

Korsh delivers precision boost control with a complete, easy-to-use 3-port electronic boost solenoid for turbocharged Subarus. Unlike the factory 2-port solenoid, it enables extremely high-resolution boost control, giving your tuner the hardware needed to safely tune your WRX, STI or Forester XT with rock-solid boost levels, quicker spool and tight control across the entire power curve.

Model-specific install brackets give OEM-quality fit and finish, and the Subaru wiring harness connector means you simply unplug the factory solenoid and plug in the Korsh unit – no cutting, splicing or crimping. The valve itself is built to commercial standards by MAC, with special seals against moisture and high-temp coils that hold response times at 6 milliseconds or less, even under extreme heat. Korsh has worked with leading tuners to ensure it works safely with the factory Subaru ECU.

Why Korsh?

• Decreased Spool Time – Flows 10% more than competing solutions.
• Plug and Play – Direct connection to the OEM harness – no wire splicing.
• Factory ECU Compatible – Custom coil matched to Subaru ECU voltage.
• Nickel Plated Fittings – Durable metal fittings, not fragile plastic.
• Balanced Valve Design – Handles up to 120psi with instant response.
• High-Temp Coils – Maintains 6ms response time in extreme conditions.
• Moisture Protection – Special seals for long-term reliability.
• 15-Minute Installation – Simple install with written and video guides.

What's Included

• 1 x Korsh 3-port MAC boost control solenoid (KOR-3PS-01)
• Model-specific install bracket

Important Notes

• Gives your tuner high-resolution boost control; designed to work safely with the factory Subaru ECU.

Vehicle Fitment

• Subaru WRX 2001–2007
• Subaru STI 2001–2007
• Subaru Forester SG XT 2003–2008

Not sure if this suits your car? Email sales@coore.com.au and our team will confirm fitment.