Turbo XS WS02-BCS Boost Control Solenoid Kit for 2002-2007 Subaru WRX/STI

Vehicle Fitment

• 2002-2007 Subaru Impreza WRX / WRX STI (all trims including base, Limited, STI, STI Limited)

Features

• Performance boost control solenoid designed to improve turbo boost management
• Replaces factory 2-port solenoid with a more capable 3-port design
• Enhances boost control especially on modified turbo systems
• Direct OEM replacement - no welding or custom adapters required
• Robust electrical connectors and ports for reliable performance
• Improves consistency of boost response and reduces surge under load
• Ideal for turbocharger upgrades, downpipe mods, and tuned vehicles
• Constructed with quality components for long-term durability

Specifications

• Part Number: WS02-BCS
• Type: Boost Control Solenoid Kit (3-port design)
• Application: Replacement for OEM boost solenoid on 2002-2007 WRX/STI
• Electrical: Factory-style connectors and mounting points
• Boost Management: Improved control vs. factory 2-port solenoid
• Installation: Direct bolt-in at stock solenoid location
• Compatibility: Turbocharged Subaru EJ20/EJ25 WRX/STI engines 2002-2007
• Emissions: Not CARB legal - not for sale in California

Included Components

• 1x Turbo XS WS02-BCS boost control solenoid assembly
• 1x Mounting bracket (if applicable)
• 1x Set of required wiring adapters/connectors
• 1x Installation hardware kit

Product Description

The Turbo XS WS02-BCS Boost Control Solenoid Kit is a direct-fit performance replacement for the factory boost solenoid on 2002-2007 Subaru WRX and WRX STI models. Upgrading from the OEM 2-port unit to this 3-port design allows more precise control of boost signals, which is particularly useful for vehicles with upgraded turbochargers, aftermarket downpipes, or custom tuning. This solenoid enhances the system's ability to manage pressure under varying load and throttle conditions, improving drivability and turbo response.

Installation is straightforward and uses the factory mounting location and electrical connections, making it suitable for DIY installation. The WS02-BCS helps maintain reliable boost control as vehicle power levels increase beyond stock. It is constructed from high-quality components to ensure durability and consistent performance over time. Note: this solenoid is not CARB legal for California sale.