COBB 3-Port Boost Control Solenoid – 2008–2012 Subaru WRX / 2008–2012 STI Hatch / 2011–2012 STI Sedan

Achieve more precise, stable, and consistent boost control on your 2008–2012 Subaru WRX or STI with the COBB 3-Port Boost Control Solenoid. The factory 2-port boost control solenoid is a known limitation on the GR/GV WRX and STI — its design can contribute to boost instability, boost creep, and inconsistent boost control, particularly on modified builds running elevated boost targets. COBB's 3-port BCS replaces the factory unit with a superior 3-port design that provides more precise and stable boost control, and is the recommended solenoid for use with the COBB Accessport and COBB-tuned boost control maps on these platforms.

Key Features

• 3-Port Design – Superior to Factory 2-Port: Replaces the factory 2-port boost control solenoid with a 3-port unit — provides more precise, stable, and consistent boost control across the RPM range, particularly on modified builds running elevated boost
• Eliminates Boost Instability: Addresses the boost instability and boost creep issues associated with the factory 2-port solenoid on the GR/GV WRX and STI platforms
• COBB Accessport Compatible: The recommended boost control solenoid for use with the COBB Accessport and COBB boost control maps on the 2008–2012 WRX and STI — enables full utilization of COBB's electronic boost control features
• Direct Fit: Engineered as a direct replacement for the factory boost control solenoid on the 2008–2012 Subaru WRX, 2008–2012 STI Hatch, and 2011–2012 STI Sedan
• COBB Quality: Manufactured by COBB Tuning — a globally recognized leader in Subaru performance tuning and hardware trusted by enthusiasts and professional tuners worldwide

Specifications

• Type: 3-Port Boost Control Solenoid (BCS)
• Replaces: Factory 2-Port Boost Control Solenoid
• Fitment: 2008–2012 Subaru WRX (GR/GV) / 2008–2012 Subaru WRX STI Hatch (GR) / 2011–2012 Subaru WRX STI Sedan (GV)
• Part Number: 715750

Note: An Accessport or compatible ECU tune is required to configure and take full advantage of the 3-port BCS's boost control capabilities — the solenoid alone does not change boost without a supporting tune. Professional installation recommended. Verify fitment for your specific GR/GV WRX or STI variant before ordering.