Subaru WRX/STI 97-98 35mm inlet / 30mm outlet TMS response [GFB]

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 adjustable vent bias system. This unique system allows you to precisely control the amount of air that escapes from each of the two outlets, providing unmatched flexibility. Key Benefits: Sound Level Control: Full Recirculation: For quiet, factory-like operation. Full Exhaust to Atmosphere: For maximum blow-by noise. Custom Mid-Tune: Adjust the sound to your preference, anywhere in between. Compatible with MAF-Sensitive Systems: Achieve a blow-by sound without the risk of stalling, backfiring, or other problems associated with systems using a Mass Air Flow (MAF). Superior Performance: Improved Throttle Response: Improves your engine's responsiveness for a more spirited ride. Faster Boost Recovery: GFB's TMS (Turbo Management System) technology allows engine power to be returned to its maximum up to 30% faster than a factory bypass valve during gear changes. Unlimited Boost Hold: Retains boost pressure without limit for optimal performance. Vent Bias Adjustment: GFB's vent bias adjustment system works by turning an adjustment ring that simultaneously adjusts the atmospheric and recirculation ports. This allows for vent ratios ranging from 100% recirculation to 100% atmosphere and all possible levels in between, providing total customization. Direct Fit Kits Available: To facilitate installation, direct fit kits are available for various vehicle models, ensuring perfect compatibility and easy installation.