Perrin Electronic Boost Control Solenoid 2002-2007 WRX / 2004-2007 STI / 2004-2008 Forester XT | Fast Response | Precision Boost Control
Overview
The Perrin Electronic Boost Control Solenoid (EBCS Pro) is a high-performance upgrade designed for Subaru WRX, WRX STI, and Forester XT models equipped with turbocharged engines from the early to mid-2000s. This solenoid replaces the factory unit to provide more precise boost control, faster spool-up, and improved reliability under demanding driving conditions. It is ideal for enthusiasts looking to unlock additional power potential while maintaining stable and safe boost levels.
Engineered with a custom solenoid coil and valve built to Perrin’s exact specifications, this EBCS operates nearly twice as fast and flows approximately 50% more air than competing designs. Its 3-port design enhances boost response and control resolution, allowing tuners to safely increase boost pressure across the entire RPM range. The solenoid is compatible with OEM ECU calibrations and popular tuning platforms, ensuring seamless integration without triggering check engine lights.
For Subaru owners, this means a more responsive and controllable turbo system that supports aggressive tuning strategies while reducing overboost risks. The durable 6061 aluminum construction ensures consistent performance in harsh under-hood environments, making it a reliable choice for both street and track use. When paired with an ECU tune, the Perrin EBCS Pro delivers a noticeable improvement in throttle response and overall turbo efficiency.
Features & Specifications
This Perrin Electronic Boost Control Solenoid is engineered for 2002-2007 WRX, 2004-2007 WRX STI, and 2004-2008 Forester XT models and features a 3-port design with fast-acting valve operation. Constructed from durable 6061 aluminum, it delivers precise boost management and improved spool-up for Subaru enthusiasts seeking enhanced turbo control and reliability.
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Brand: Perrin Performance
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Product: Electronic Boost Control Solenoid
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Part Number: ASM-TAC-729
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Fitment: 2002-2007 WRX, 2004-2007 WRX STI, 2004-2008 Forester XT
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Material: 6061 Aluminum
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Finish: Anodized Silver
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Construction: CNC Machined
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Origin: USA
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Design: 3-Port Valve
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Flow Improvement: ~50% more than competitors
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Response Speed: Nearly 2x faster than factory solenoid
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Compatibility: OEM ECU calibrations, COBB Accessport, open-source tuning
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Tuning Required: Yes, ECU calibration recommended
Key Benefits
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Performance: Faster boost spool-up and improved boost stability across RPM range
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Durability: Robust 6061 aluminum body withstands extreme engine bay conditions
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Fitment: Direct bolt-on replacement with factory-style connectors for easy installation
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Control: 3-port design allows for higher resolution boost control and safer tuning
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Compatibility: Works seamlessly with OEM ECU and popular tuning platforms without triggering CEL
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Reliability: Reduces overboost conditions common with factory solenoids
What's Included
- 1× Perrin Electronic Boost Control Solenoid (EBCS Pro) assembly
- 1× 5/32" ID Vacuum hose
- 1× Bracket for washer bottle
- 1× 5/16" Nickel barb 1/8NPT, straight
- 2× 5/32" Nickel barb 1/8NPT, straight
- 1× M5 Short arm hex key
- 1× M8 x 10 Button head stainless steel screw
- 1× M8 Flat washer stainless steel
- 1× M6 x 25 Button head socket cap screw stainless steel
- 1× M6 x 18 Fender washer stainless steel
- 1× M4 Short arm hex key
- 10× Zip ties
- Installation instructions
Installation & Compatibility
The Perrin Electronic Boost Control Solenoid is designed for straightforward installation using factory-style connectors and mounting points, making it a DIY-friendly upgrade for Subaru enthusiasts with basic mechanical skills. No special tools beyond common hand tools and the included hex keys are required. However, to fully realize the benefits of this solenoid, an ECU calibration or tune is necessary to optimize boost control and prevent overboost conditions.
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Professional Installation: Recommended for those unfamiliar with ECU tuning
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Modifications Required: None to solenoid installation; tuning required for full functionality
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Verify Compatibility: Confirm fitment for your specific year and model before purchase
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