Dump valve Respons TMS GFB Subaru WRX 01-07 /STI 01-11, Forester 06-08

At first glance, the GFB Respons dump valve may seem like a simple dual-port dump valve, but it offers much more thanks to its ventilation bias adjustment system. This unique system allows you to precisely control the amount of air that escapes from each of the two outlets, providing unparalleled flexibility.

Key Benefits:

Sound Level Control:

Total Recirculation: For quiet, factory-like operation.
Total Exhaust to Atmosphere: For maximum blowing noise.
Custom Mid-Tuning: Adjust the sound to your liking, anywhere between the two extremes.
Compatibility with MAF Sensitive Systems: Get a blow-by sound without the risk of stalling, backfiring, or other problems associated with systems using Mass Air Flow (MAF).

Superior Performance:

Better Throttle Response: Improves your engine's responsiveness for a more dynamic ride.
Faster Boost Recovery: GFB's TMS (Turbo Management System) technology helps bring engine power back to full power up to 30% faster than a factory bypass valve during gear changes.
Unlimited Boost Hold: Maintains boost pressure without limit for optimal performance.
Ventilation Polarization Adjustment: The GFB's ventilation polarization adjustment system works by turning an adjustment ring that simultaneously adjusts the atmospheric and recirculation ports. This allows for ventilation ratios ranging from 100% recirculation to 100% atmosphere and all possible levels in between, providing total customization.
Direct Fit Kits Available: For ease of installation, direct fit kits are available for various vehicle models, ensuring perfect compatibility and easy installation.

Compatibility:

SUBARU STi 2003-2007
SUBARU STi 2008-2013
SUBARU WRX MY01-02 (aka “bugeye”)
SUBARU WRX MY06-07 (aka “hawkeye”)
SUBARU WRX MY01-02 (aka “bugeye”)
SUBARU WRX MY03-05 (aka "peanut eye")
SUBARU XT MY05-08 (Series II) Note: Vehicle models before 03/06 require T9000, please contact us for confirmation
SUBARU STi MY02 (aka "bugeye")