COBB 3-Port Boost Control Solenoid 2002-2007 WRX / 2004-2007 STI / 2004-2008 Forester XT

Take control of your boost with the COBB 3-Port Boost Control Solenoid – the ideal solution for precise and reliable boost management through your vehicle’s factory ECU. Designed to support everything from stock setups to high-power builds with larger turbos or external wastegates, the COBB BCS offers enhanced performance, safety, and flexibility.

This 3-Port BCS helps eliminate the inconsistent boost control often found in OEM systems, ensuring stable and repeatable boost response for accurate tuning and improved drivability—whether you're running factory levels or pushing serious power.

Features:

• Accurate and Consistent Boost Control
• Plug and Play 18-Gauge Wiring Harness
• 1/8" Nickel Plated Barbed Fittings
• Rated up to 120psi
• Custom Aluminum BCS Mount

Note: TUNING REQUIRED! Please download the appropriate Off The Shelf Map for your vehicle or contact your Protuner in order to safely utilize this part!

Installation Instructions

This part is legal for sale and use on Emissions Controlled Vehicles in all 50 states when used in accordance with the manufacturer's application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number: D-660-261