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SKU: B712750 | UPC: 799928865289
Cobb 04-07 Subaru STI / 02-07 WRX / 04-08 FXT 3-Port Boost Control Solenoid
The Cobb 3-Port Boost Control Solenoid (MPN 712750) replaces the factory 2-port unit on turbocharged Subarus, fitting 2002-2007 Impreza WRX, 2004-2007 Impreza WRX STI, and 2004-2008 Forester XT models. This upgrade vents excess boost pressure to atmosphere for sharper response and consistent pressure delivery. Drivers gain improved turbo spool, reduced lag, and stable power across the rev range with proper tuning.
Key Features
- 3-Port Design: Vents boost pressure directly to atmosphere, enabling faster actuation and tighter control than 2-port OEM solenoids.
- Direct OEM Replacement: Plug-and-play fit using factory connectors and mounting points, no cutting or fabrication required.
- Brass Body Construction: Corrosion-resistant brass housing with EPDM diaphragm withstands high pressures and heat for extended service life.
- Quick Response: MAC valve technology delivers rapid open/close times, supporting higher boost levels and precise tuning.
- Tuning Compatibility: Integrates with Cobb Accessport maps and ProTunes for optimized boost curves on EJ25/EJ20 turbo engines.
Product Notes
- ECU tuning required to realize full boost control potential and avoid overboost conditions.
- Inspect vacuum lines during install replace brittle hoses for peak performance.
Installation Notes
- Professional installation recommended.
- Disconnect battery before swapping route vent line away from exhaust heat.
- Mounts to factory bracket with included hardware torque solenoid nuts to 10 ft-lbs.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX |
| 2006-2007 | Subaru | Impreza | WRX Limited |
| 2006-2007 | Subaru | Impreza | WRX TR |
| 2004-2007 | Subaru | Impreza | WRX STI |
| 2007 | Subaru | Impreza | WRX STI Limited |
| 2004-2005 | Subaru | Forester | XT |
| 2005 | Subaru | Forester | XT Premium |
| 2006-2008 | Subaru | Forester | XT Limited |
| 2008 | Subaru | Forester | Sports 2.5 XT |
Why Choose Cobb?
- Proven track record in Subaru motorsports and street tuning since 1998.
- Components tested on dynos and tracks for real-world durability.
- Designed by engineers focused on EJ-series turbo systems.
Frequently Asked Questions
-
Q: Will this fit my 2006 STI?
A: Yes, direct bolt-on for all 2004-2007 Impreza WRX STI models including Limited editions confirm your chassis is GD/GD chassis. -
Q: What is the solenoid made of?
A: Heavy-duty brass solenoid body with a reinforced EPDM diaphragm rated for 30+ PSI continuous duty. -
Q: Does it come with a warranty?
A: Backed by Cobb's 1-year limited warranty against manufacturing defects when installed correctly.
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: 6 x 4 x 2 inch box with foam inserts
- Weight: 0.4 lbs (shipped)
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