3-Port Boost Control Solenoid

The GrimmSpeed Boost Control Solenoid is engineered as a direct-fit replacement for the factory boost solenoid in EJ series Subaru vehicles. A failing OEM solenoid can lead to frustrating symptoms such as inconsistent boost levels, undesirable boost creep, or the inability to maintain target pressure. This 3-port solenoid design directly matches the OEM connections, simplifying the installation process. It connects to the factory wiring and vacuum lines without requiring modifications or re-tuning. The unit features a balanced valve capable of withstanding up to 120psi without impacting response time, and its high-temperature coils ensure consistent performance even in extreme engine bay heat. GrimmSpeed emphasizes a plug-and-play installation for this boost control solenoid, often achievable within 15 minutes with their provided guides. The design incorporates model-specific brackets and uses Subaru wiring harness connectors, eliminating the need for cutting or crimping OEM wires. This focus on ease of installation and direct-fit ensures a clean and robust setup. As with any upgrade to the boost control system, a professional tune is required for optimal and safe operation. The product is designed for the 2006-2007 Subaru WRX, 2004-2007 Subaru WRX STI, and 2004-2008 Subaru Forester XT models.