Fits 2009-2020 Nissan GT-R R35 models including Base, Premium, Black Edition, Nismo, Pure, Track Edition, and 50th Anniversary Edition.

The GFB Hybrid TMS (Turbo Management System) Dual Port is a performance-oriented blow off valve kit designed to replace the factory units on the twin-turbocharged Nissan GT-R. This system utilizes GFB's pioneered staged venting technology, which manages airflow based on the amount of valve lift. Under low valve lift, the majority of the air is recirculated to maintain smooth drivability and prevent stalling. As the vehicle is driven harder and the valve opens further, the atmosphere venting port is exposed to provide the signature blow-off sound.

These valves are highly versatile and can be configured to meet your specific needs using the provided plugs. You can set them for full recirculation for a quiet, stealthy setup, a 50/50 split for a balance of performance and sound, or full atmosphere operation. This comprehensive kit includes two valves to complete the R35's dual-bank intake system.

• Manufacturer Part Number: T9205
• Venting Configuration: Dual Port (Staged Recirculating and Atmospheric)
• Operational Modes: Full Recirc, 50/50, or Full Atmosphere using included plugs
• TMS Technology: Optimized for faster boost recovery on gearshifts
• Quantity: Set of 2 valves included

Fits select 2002-2020 Subaru Forester XT, Impreza WRX, and WRX STI. The GFB Hybrid TMS Dual Port valve uses staged venting technology to provide the best of both worlds: quiet operation during normal driving and a sharp atmospheric vent under high boost. By utilizing a dual-outlet design, the valve recirculates air at low lift to maintain factory-style drivability and idle stability. As boost pressure and valve lift increase, the atmospheric port is exposed to provide the signature blow-off sound enthusiasts desire.

Equipped with GFB’s Turbo Management System (TMS) technology, this valve is designed to improve throttle response by reducing turbo lag. The kit includes modular plugs, allowing you to configure the unit for full recirculation, a 50/50 split, or full atmospheric operation depending on your tuning requirements and sound preference. It bolts directly to the factory intercooler flange for a straightforward installation.

• Dual-staged venting ports for improved drivability and sound
• Adjustable configuration: Full Recirc, 50/50, or Full Atmosphere
• TMS technology designed to minimize lag and improve boost recovery
• Direct bolt-on fitment for Subaru top-mount intercooler flanges
• Manufacturer Part Number: T9203

Fits select 2005-2014 Subaru Forester XT, Impreza WRX, and Legacy GT models. The GFB HYBRID TMS Dual Port valve (MPN: T9201) offers a versatile solution for turbo management by combining the performance benefits of a recirculating valve with the audible feedback of an atmospheric blow-off valve.

Utilizing GFB’s pioneered "staged" venting technology, this valve prioritizes recirculation at low valve lifts to ensure proper ECU fueling and smooth drivability. As the vehicle is driven harder and boost levels increase, the valve opens further to expose the atmospheric port, delivering a louder discharge sound. This dual-port design is fully configurable using the included plugs, allowing the user to set the valve for full recirculation, a 50/50 split, or full atmosphere operation.

• Manufacturer Part Number: T9201
• Staged venting design for optimized boost response and sound
• Configurable venting bias (Full Recirc, 50/50, or Full Atmosphere)
• Includes port-blocking plugs for manual configuration
• Direct bolt-on replacement for the factory valve
• TMS (Turbo Management System) technology for faster boost recovery on gear shifts

Fits 2004-2005 Subaru Forester XT models.

The GFB Hybrid TMS Dual Port utilizes a pioneered dual-port design to deliver both performance and sound without compromising drivability. By "staging" the two venting outlets, this valve prioritizes air recirculation at low valve lifts to ensure the MAF sensor remains happy and the engine stays responsive. As the car is driven harder and boost levels increase, the valve opens further to expose the atmospheric venting port for a distinct blow-off sound.

Built with GFB’s Turbo Management System (TMS) technology, this valve is designed to return the engine to peak boost faster after gear shifts. The system is highly versatile and includes the necessary plugs to allow for multiple setups depending on your preference or tuning requirements.

• Dual-staged venting outlets for improved throttle response
• Configurable for Full Recirculation, 50/50 Split, or Full Atmosphere operation
• Direct-fit replacement for the factory unit
• Includes configuration plugs for easy adjustment
• Manufacturer Part Number: T9200

Fits select 1991-2015 Dodge Stealth, Eagle Talon, Mitsubishi Lancer Evolution, 3000GT, Eclipse, and Subaru Legacy models. Please check the fitment table for specific submodel compatibility.

The GFB Mach 2 TMS Recirculating Diverter Valve is a performance-oriented replacement for restrictive factory valves, designed to improve throttle response and minimize lag. Utilizing GFB's Turbo Management System (TMS) technology, this valve ensures rapid boost recovery during gear shifts. Built to handle extreme forced induction setups, the Mach 2 is laboratory-tested to withstand boost pressures exceeding 100 psi without leaking or failing.

• Direct-fit recirculating design for consistent performance without CEL issues
• 33mm inlet and 33mm outlet for compatibility with factory and aftermarket plumbing
• Precision CNC-machined body for superior durability and pressure retention
• Maintains factory-level acoustics while providing aftermarket performance
• Manufacturer Part Number: T9133

Fits select 1997-2009 Audi A4 and TT, Saab 9-3 and 9-5, and Volkswagen Beetle, Golf, and Passat models (1.8T / 2.3T).

The GFB Mach 2 TMS Recirculating Diverter Valve is a performance-oriented replacement for weak factory plastic or diaphragm-style valves. Utilizing GFB’s Turbo Management System (TMS) technology, this valve is engineered to reduce turbo lag by keeping the turbine spinning during gear shifts, ensuring rapid boost recovery and sharpened throttle response. Unlike OE valves that can leak or fail under increased load, the Mach 2 is proven to withstand boost pressures in excess of 100 psi.

• Direct replacement for factory 25mm diverter valves (MPN: T9125)
• TMS Technology for faster boost return on gearshift
• Tested to hold 100+ psi without leaking
• Recirculating operation maintains factory-style airflow management
• Precision-machined internal components for maximum durability
• Includes 25mm inlet and 25mm outlet ports

The GFB Mach 2 TMS Universal Weld-On Recirculating Diverter Valve (T9119) is a high-performance solution for custom forced induction applications. Built with GFB's proprietary Turbo Management System (TMS) technology, this valve is engineered to improve throttle response and reduce turbo lag by returning pressurized air back into the intake system, keeping the compressor speed high during gear changes.

Unlike standard factory valves that often leak or fail under high-boost conditions, the Mach 2 is precision-engineered to handle increased pressures without sacrificing drivability. Its recirculating design ensures quiet operation and maintains factory-level idling by preventing the air-metering issues common in atmospheric blow-off valves.

• TMS Technology: Designed to help the turbocharger stay at a higher RPM during shifts for significantly faster boost recovery.
• Recirculating Configuration: Diverts air back into the intake tract for smooth, quiet performance on MAF-equipped vehicles.
• Weld-On Base: Universal fitment allows for direct integration into custom intercooler piping or intake runners.
• Manufacturer Part Number: T9119

Fits 2018-2020 Kia Stinger GT, GT1, GT2, and GTS models (3.3T).

The GFB Mach 2 TMS Recirculating Diverter Valve is engineered specifically for the Kia Stinger 3.3T V6 to replace the factory plastic valves that often leak or fail under increased boost. Utilizing GFB's proprietary Turbo Management System (TMS) technology, these valves are designed to remain shut until boost is released, ensuring rapid boost recovery on gearshifts and significantly sharper throttle response.

Constructed from CNC-machined billet aluminum, the Mach 2 is built to withstand boost pressures in excess of 100psi—far beyond what any factory or aftermarket turbocharger can produce. This set includes two valves for a complete, bolt-on installation using the factory mounting locations to eliminate pressure drop and boost leaks.

• Manufacturer Part Number: T9112
• Includes 2 recirculating diverter valves
• TMS technology for faster boost recovery and reduced lag
• Rated to withstand 100psi+ of boost pressure
• Direct bolt-on replacement for factory components
• Precision CNC-machined billet aluminum construction

Fits select 2018-2020 Hyundai Elantra GT, Kona, Veloster, and 2020 Kia Forte GT (2.0T).

The GFB Mach 2 TMS Recirculating Diverter Valve is a performance-oriented replacement for factory valves that often struggle to maintain pressure or respond quickly during spirited driving. Utilizing GFB's proprietary Turbo Management System (TMS) technology, the Mach 2 is engineered to improve throttle response and ensure rapid boost recovery during gearshifts. This valve is built to handle extreme induction setups, with a design tested to withstand boost pressures exceeding 100 psi.

By recirculating the air back into the intake system, this valve provides the performance benefits of a high-flow diverter without the noise associated with atmosphere-venting valves. It is a direct-fit solution that preserves factory-style operation while offering significantly higher reliability and pressure capacity than OEM components.

• Manufacturer Part Number: T9111
• Boost Capacity: Tested to 100+ psi
• Technology: GFB TMS (Turbo Management System) for faster boost recovery
• Configuration: Recirculating (Atmosphere venting kits available separately)
• Performance: Improves throttle response and minimizes lag

Fits select 2018-2020 Hyundai Veloster N and Kia Stinger (2.0T).

The GFB Mach 2 TMS (Turbo Management System) Recirculating Diverter Valve is designed to replace factory valves that often leak or fail under increased boost levels. Engineered for rapid boost recovery during gearshifts and sharper throttle response, this valve ensures your turbo system maintains peak efficiency without the noise of an atmospheric blow-off valve.

Constructed to extreme tolerances, the Mach 2 can withstand boost pressures exceeding 100 psi, making it far more durable than original equipment plastic components. By keeping the air recirculated within the intake system, it maintains factory-like driveability while preventing the common "stumbling" or rich-running issues associated with venting to atmosphere on modern MAF-equipped engines.

• Manufacturer Part Number: T9110
• TMS Technology for faster boost recovery and reduced turbo lag
• Fully recirculating design for quiet, factory-style operation
• Tested to hold boost pressures of 100+ psi
• Direct bolt-on replacement for factory diverter valves

Fits 2014-2020 Subaru Forester (2.0XT) and WRX (2.0L Turbo) models.

The GFB Mach 2 TMS Recirculating Diverter Valve is a direct-fit performance upgrade designed to replace the factory plastic bypass valve. Utilizing GFB's proven Turbo Management System (TMS) technology, this valve is engineered specifically to reduce turbo lag by ensuring rapid boost recovery during gearshifts and improving overall throttle response.

Unlike factory valves that can leak or fail under increased pressure, the Mach 2 is built to withstand boost pressures exceeding 100 psi, making it a reliable solution for both stock and highly modified forced induction systems. As a fully recirculating valve, it vents air back into the intake tract to maintain factory-spec airflow logic and quiet operation without the venting noise of a blow-off valve.

• Manufacturer Part Number: T9107
• TMS technology for faster boost recovery and sharper throttle response
• Tested to withstand boost pressures of 100+ psi
• Recirculating design maintains quiet, factory-style operation
• Direct bolt-on replacement for the OE diverter valve

Fits 2009-2020 Nissan GT-R (R35) across all trims, including Base, Premium, Black Edition, Track Edition, Nismo, Pure, and 50th Anniversary Edition.

The GFB Mach 2 TMS (Turbo Management System) recirculating diverter valves are engineered specifically for the R35 GT-R's twin-turbo setup. By utilizing GFB’s proprietary TMS technology, these valves improve throttle response and ensure rapid boost recovery during gearshifts, keeping the turbos spooled and ready for immediate acceleration. Designed to handle extreme performance levels, the Mach 2 can withstand boost pressures in excess of 100 psi without leaking or failing.

• Direct bolt-on replacement for factory plastic or leaking diverter valves
• TMS technology delivers faster boost recovery between gear changes
• Recirculating design maintains factory-style operation without atmospheric venting noise
• Precision machined to withstand 100+ psi boost pressures
• Complete kit includes two (2) valves for the GT-R twin-turbo system
• Manufacturer Part Number: T9105

Fits select 2001-2020 Subaru Impreza, WRX, STI, and Forester models. The GFB Mach 2 TMS Recirculating Diverter Valve is a direct-replacement performance upgrade for factory valves that often leak or fail under high boost. Using GFB's proprietary Turbo Management System (TMS) technology, this valve is engineered to improve throttle response and ensure rapid boost recovery during gear shifts.

Unlike atmospheric valves that vent to the air, the Mach 2 is a fully recirculating unit that keeps the engine management system happy by returning air to the intake. It features a heavy-duty brass piston and precision-machined housing capable of withstanding boost pressures in excess of 100 psi, making it suitable for everything from stock daily drivers to high-horsepower builds.

• Manufacturer Part Number: T9103
• TMS Technology for faster boost recovery and sharper throttle response
• Full recirculating operation for quiet, factory-style performance
• Tested to withstand boost pressures of 100+ psi
• Direct bolt-on fitment for Subaru factory mounting points
• Includes all necessary hardware for installation

Fits select 1990-2013 Mazda 3/6/CX-7, Mitsubishi Eclipse/Galant, Eagle Talon, and Plymouth Laser models.

The GFB Mach 2 TMS Recirculating Diverter Valve (T9102) is a performance-driven replacement for factory valves, specifically engineered to improve throttle response and ensure rapid boost recovery during gear shifts. Utilizing GFB's proprietary Turbo Management System (TMS) technology, this valve provides superior boost control compared to stock components.

Built to handle the most demanding forced induction setups, the Mach 2 is capable of withstanding boost pressures exceeding 100 psi. Its recirculating design ensures that pressurized air is vented back into the intake system, maintaining quiet operation while providing the mechanical strength required for modified vehicles.

• TMS Technology: Designed to return the engine to peak boost faster than the OE valve for improved drivability.
• Extreme Pressure Tolerance: Proven to hold boost pressures of 100 psi+, far exceeding the limits of factory turbos.
• Direct Fit: Designed as a bolt-on replacement for factory mounting points on compatible vehicles.
• Premium Construction: Precision-machined for longevity and consistent performance under high thermal stress.
• Manufacturer Part Number: T9102

Fits select 2003-2014 Subaru Legacy, Forester, and Impreza models (including WRX and XT trims).

The GFB Mach 2 TMS Recirculating Diverter Valve is engineered for performance-oriented drivers who want the technical benefits of GFB’s Turbo Management System (TMS) while maintaining a quiet, factory-style recirculating operation. This valve focuses on rapid boost recovery during gearshifts and sharper throttle response by keeping the turbocharger spooling more effectively.

Constructed to extreme tolerances, the Mach 2 is capable of withstanding boost pressures exceeding 100 psi, ensuring it will never leak or fail under even the most aggressive turbo configurations. It serves as a direct bolt-on replacement for the factory valve, which is often prone to leaking at higher-than-stock boost levels.

• GFB TMS Technology for improved throttle response and boost recovery
• Proven recirculating design for quiet operation without venting to atmosphere
• Withstands boost pressures of 100psi+
• CNC machined for precise fitment and durability
• Direct replacement for OE diverter valves
• Manufacturer Part Number: T9101

Engineered for high-powered forced induction applications, the GFB SV52 High Flow Blow Off Valve (BOV) is designed to handle extreme boost levels where standard valves fail. While many valves rely on rolling diaphragms, the SV52 utilizes a precision-machined piston for superior strength and reliability. Diaphragms are prone to failure under the high net pressure found in high-boost BOV environments; the SV52 eliminates this weak point to ensure consistent performance and pressure retention.

• Manufacturer Part Number: T9052
• Pressure Rating: Rated to withstand over 300psi
• Valve Type: Piston-actuated for maximum durability over diaphragms
• Compatibility: Suitable for high-horsepower turbocharged and supercharged engines
• Design: High-flow architecture to prevent compressor surge during rapid throttle lifts

The SV52 provides the flow capacity and structural integrity necessary for professional-grade builds. Whether you are running a high-boost turbo setup or a large-displacement supercharger, this valve offers the response and sealing capability required to protect your drivetrain components.

Fits select 1991-2015 Mitsubishi (Lancer Evolution, Ralliart, Eclipse, 3000GT), Dodge Stealth, Eagle Talon, and Subaru Legacy models.

The GFB TMS Respons Blow Off Valve Kit (T9033) is engineered to eliminate the common drivability issues—such as stalling and backfiring—that occur when using fixed-ratio atmospheric valves on MAF-equipped vehicles. Featuring GFB's patented Venting Bias Adjustment, this valve allows you to manually fine-tune the ratio of air recirculated into the intake versus air vented to the atmosphere, giving you the signature blow-off sound without compromising engine stability.

Constructed for high-performance applications, the Respons utilizes GFB's Turbo Management System (TMS) technology to ensure rapid boost recovery during gear shifts and significantly sharper throttle response. The internal piston and spring assembly are designed to withstand boost pressures in excess of 100 psi, ensuring it will never leak even in extreme forced induction setups.

• Manufacturer Part Number: T9033
• Patented Venting Bias Adjustment: Customizable sound and recirculation levels
• TMS Technology: Optimized for faster boost recovery and throttle response
• Durability: Laboratory tested to hold 100+ psi
• Fitment: Replaces factory valves on listed 1991-2015 turbo applications

Fits select 1997-2009 Audi, Saab, and Volkswagen models including the A4, TT, 9-3, 9-5, Beetle, Golf, Jetta, and Passat (1.8T / 2.3T).

The GFB TMS Respons Blow Off Valve (BOV) Kit T9025 is engineered to provide the acoustic benefits of an atmosphere-venting valve without the common driveability issues associated with mass airflow (MAF) sensors. While standard fixed-ratio valves often cause stalling or backfiring, the Respons utilizes an adjustable venting bias. This allows the user to fine-tune the ratio of recirculated to atmosphere-vented air, ensuring the ECU remains satisfied while delivering the desired blow-off sound.

Built with GFB’s proprietary Turbo Management System (TMS) technology, this valve is designed specifically to maintain turbo RPM during gearshifts. This results in significantly faster boost recovery and improved throttle response compared to factory diverter valves. The precision-machined internal components are rated to withstand boost pressures exceeding 100 psi, making it a reliable solution for high-boost applications.

• Manufacturer Part Number: T9025
• Adjustable venting bias for custom sound and performance tuning
• TMS Technology for rapid boost recovery and sharpened throttle response
• High-pressure capability tested to 100psi+
• Replaces restrictive factory valves on 1.8T and 2.3T engines

Fits select 2021-2022 Hyundai Elantra N Line, Kona N Line, and Sonata N Line (2.5T).

The GFB TMS Respons Blow Off Valve Kit (T9014) is engineered to replace the factory bypass valve with a high-performance unit that offers both throttle response improvements and customizable sound. Featuring GFB's patented venting bias adjustment, you can control the ratio of air recirculated back into the intake versus what is vented to the atmosphere. This allows you to dial in the perfect sound level for your preference without triggering engine fault codes or stalling.

Constructed from CNC-machined billet aluminum, this kit is designed to withstand higher boost pressures than plastic OE components. By holding pressure more effectively and recovering faster during shifts, it reduces lag and provides a more immediate engine response.

• Direct bolt-on replacement for factory valve
• Patented adjustable venting bias for precise sound control
• Improves boost recovery and throttle response between gears
• Durable billet aluminum construction with high-tolerance brass piston
• Manufacturer Part Number: T9014

Fits 2018-2020 Kia Stinger GT, GT1, GT2, and GTS (3.3T).

Designed to eliminate the common drivability issues associated with atmospheric venting on turbocharged platforms, the GFB Respons Blow Off Valve kit utilizes a patented venting bias adjustment. This allows you to fine-tune the ratio of air recirculated versus air vented to the atmosphere, providing the signature blow-off sound without causing stalling, backfiring, or ECU errors. Built for performance, this kit features GFB's proprietary TMS (Turbo Management System) technology, engineered to keep the turbo spooling during gearshifts for significantly faster boost recovery and sharper throttle response.

• TMS Technology: Engineered to provide rapid boost recovery and improved throttle response.
• Patented Venting Bias: Adjustable control over the venting ratio to balance acoustics and engine stability.
• High-Pressure Reliability: Precision-machined to withstand boost pressures in excess of 100 psi.
• Direct Fit: Includes both Mach 2 and Respons valves designed specifically for the Kia Stinger 3.3L twin-turbo V6 engine.
• Manufacturer Part Number: T9013

Fits 2018-2020 Kia Stinger GT, GT1, GT2, and GTS models equipped with the 3.3T V6 engine.

The GFB Respons TMS Blow Off Valve Kit (T9012) is engineered specifically for the Kia Stinger 3.3T to provide better throttle response and a customizable blow-off sound without the driveability issues common to atmospheric valves. Many vehicles experience backfiring or stalling when using fixed-ratio valves; the Respons kit solves this via GFB's patented venting bias adjustment, allowing you to fine-tune how much air is recirculated versus vented to the atmosphere.

Built with GFB’s Turbo Management System (TMS) technology, these valves are designed to stay closed under vacuum to prevent stalling and help maintain turbo RPM during shifts for rapid boost recovery. These valves are CNC machined and tested to withstand boost pressures in excess of 100 psi, ensuring they will outlast and outperform factory plastic units.

• Includes two (2) GFB Respons TMS valves and all necessary hardware
• Patented adjustable venting bias for sound control and engine stability
• TMS technology for faster boost recovery and sharper throttle response
• Tested to withstand 100+ psi
• Manufacturer Part Number: T9012

Fits select 2018-2020 Hyundai Elantra GT, Kona, Veloster, and 2020 Kia Forte GT models (1.6T).

The GFB TMS Respons (Part #T9011) is designed specifically for owners who want the distinct blow-off sound without the common drivability issues found in standard atmosphere-venting valves. While many MAF-based or sensitive engine management systems suffer from stalling, backfiring, and erratic idling when venting air, the Respons utilizes a patented venting bias adjustment. This allows you to fine-tune the ratio of air recirculated back to the intake versus air vented to the atmosphere to find the perfect balance for your vehicle.

Built with GFB’s Turbo Management System (TMS) technology, this valve focuses on rapid boost recovery during gearshifts and significantly sharper throttle response. It is engineered for extreme performance, tested to withstand boost pressures in excess of 100 psi—higher than any factory or aftermarket turbo system will likely produce.

• Direct bolt-on replacement for factory diverter valves
• Patented adjustable venting bias for sound control without stalling
• TMS technology for faster boost recovery and improved throttle response
• Proven to hold 100+ psi of boost pressure
• Precision CNC-machined construction
• Manufacturer Part Number: T9011

Fits 2014-2018 Subaru Forester 2.0XT and 2015-2020 Subaru WRX models equipped with the 2.0L engine.

The GFB Respons TMS Blow Off Valve is engineered to solve the common drivability issues associated with fixed-ratio atmosphere-venting valves, such as stalling and backfiring. Featuring GFB's patented Venting Bias Adjustment, this kit allows you to precisely control the ratio of air vented to the atmosphere versus recirculated to the intake. This provides the signature blow-off sound while maintaining factory-smooth operation.

Built with GFB’s Turbo Management System (TMS) technology, this valve is designed to improve boost recovery during gearshifts and sharpen throttle response. It is constructed to extreme tolerances, capable of withstanding boost pressures in excess of 100 psi, ensuring it outlasts and outperforms the factory unit.

• Manufacturer Part Number: T9007
• Patented Venting Bias Adjustment for customizable sound and performance
• TMS Technology for rapid boost recovery and improved throttle response
• Withstands boost pressures of 100psi+
• Bolt-on replacement for factory valves on 2.0L FA20DIT engines

Fits 2011-2017 Nissan Juke S, SL, SV, Nismo, and Nismo RS (1.6L Turbo).

The GFB TMS Respons Blow Off Valve (BOV) kit is designed to eliminate the common idling and stalling issues associated with fixed-ratio atmosphere-venting valves. This kit features Go Fast Bits' patented venting bias adjustment, allowing you to fine-tune the ratio of air recirculated back into the intake versus air vented to the atmosphere. This enables you to achieve the distinct blow-off sound without compromising engine stability or triggering rich-condition issues.

Engineered with GFB’s Turbo Management System (TMS) technology, this valve ensures rapid boost recovery during gear shifts and sharpened throttle response. Built to exceed standard requirements, the T9006 Respons valve is tested to withstand boost pressures in excess of 100 psi, ensuring it outlasts any turbo setup the Juke can support.

• Manufacturer Part Number: T9006
• Patented adjustable venting bias for custom sound and performance
• TMS Technology for improved boost recovery and throttle response
• High-pressure capacity: Rated to 100psi+
• Direct fit for factory mounting points

Fits 2009-2020 Nissan GT-R models, including Base, Premium, Black Edition, Nismo, and Track Edition.

The GFB TMS Respons Twin Valve Blow Off Valve Kit (T9005) is engineered specifically for the R35 GT-R platform to eliminate the stalling and backfiring issues commonly associated with atmospheric venting. Featuring GFB's patented venting bias adjustment, this kit allows you to fine-tune the ratio of air recirculated into the intake versus air vented to the atmosphere. This ensures you achieve the desired blow-off sound without compromising the vehicle's drivability or triggering lean-run conditions.

Utilizing GFB’s Turbo Management System (TMS) technology, these valves are designed to improve throttle response by keeping the turbo spooling during gearshifts and throttle transitions. Every Respons valve is tested to withstand boost pressures exceeding 100 psi, ensuring reliable performance even in high-horsepower builds where factory valves typically leak.

• Patented adjustable venting bias for custom sound and performance tuning
• TMS Technology for optimized throttle response and rapid boost recovery
• Direct bolt-on replacement for factory bypass valves
• Tested to hold 100+ psi of boost pressure
• Precision CNC-machined construction
• Manufacturer Part Number: T9005

Fits select 2001-2020 Subaru Impreza (RS/WRX/STI), WRX STI, and Forester XT models. The GFB Respons TMS (Turbo Management System) provides a solution for drivers who want the distinct blow-off sound without the common drivability issues associated with fixed-ratio atmospheric valves.

Standard atmosphere-venting valves often cause rich-running conditions, stalling, and backfiring on Subaru platforms. The GFB Respons solves this through its patented Venting Bias Adjustment. By rotating the adjustment ring, you can fine-tune exactly how much air is recirculated to the intake versus vented to the atmosphere. This allows you to achieve the desired sound level while maintaining the factory ECU's expected airflow for perfect idle and throttle transitions.

• TMS Technology: Engineered to ensure rapid boost recovery on gearshifts and superior throttle response compared to OE valves.
• Extreme Pressure Handling: Proven to withstand boost pressures in excess of 100 psi, ensuring it will never leak or fail under high-boost applications.
• Adjustability: Patented venting bias control allows for a silent stealth mode or a loud atmospheric vent.
• Direct Fit: Designed to bolt into factory mounting locations for a straightforward installation.
• Part Number: T9003

Fits select 1990-2013 Mazda 3/6 Mazdaspeed, CX-7, Mitsubishi Eclipse, Galant VR-4, Eagle Talon, and Plymouth Laser. This GFB TMS Respons kit provides a direct-fit solution for drivers seeking the signature blow-off sound without the drivability issues common to atmospheric valves.

The Respons features Go Fast Bits' patented venting bias adjustment, allowing you to fine-tune the ratio of air vented to the atmosphere versus air recirculated to the intake. This control is critical for vehicles with sensitive airflow sensors, as it eliminates the backfiring, stalling, and stumbling often associated with fixed-ratio atmospheric valves. Built with GFB’s Turbo Management System (TMS) technology, this valve is engineered to improve throttle response and ensure rapid boost recovery during gearshifts.

• Patented Venting Bias: Hand-adjustable ring allows for precise control of the atmospheric venting volume.
• Extreme Boost Handling: Proven to withstand pressures exceeding 100 psi, ensuring it outlasts any turbo on the market.
• TMS Technology: Optimizes throttle response by reducing turbo lag between shifts.
• Direct Bolt-On: Designed for specific vehicle applications with all necessary hardware included.
• MPN: T9002

Fits select 2003-2014 Subaru Impreza, Legacy, and Forester models.

The GFB TMS Respons Blow Off Valve Kit (T9001) is engineered to solve the drivability issues often associated with atmospheric venting on Subaru platforms, such as stalling and backfiring. Featuring GFB's patented venting bias adjustment, this valve allows you to control the proportion of air recirculated into the intake versus what is vented to the atmosphere. This ensures you get the signature blow-off sound while maintaining the smooth operation of a factory recirculating valve.

Utilizing GFB’s Turbo Management System (TMS) technology, the Respons is designed to minimize turbo lag by keeping the compressor spinning during gear changes, resulting in significantly faster boost recovery and sharper throttle response. Constructed for extreme performance, this valve is tested to withstand boost pressures exceeding 100 psi.

• Patented adjustable venting bias for custom sound and performance
• TMS Technology for rapid boost recovery and improved throttle response
• Capable of holding 100+ psi of boost pressure
• Direct bolt-on fitment for specific Subaru turbo applications
• Manufacturer Part Number: T9001

The GFB TMS Respons Blow Off Valve Kit (T9000) fits select 1998-2005 Subaru Forester, Impreza, and Legacy models. Designed for drivers who want the signature blow-off sound without the performance drawbacks, this kit solves the common issues of stalling and backfiring often associated with fixed-ratio atmosphere-venting valves.

Featuring GFB's patented Venting Bias Adjustment, you can fine-tune the ratio of air returned to the intake versus air vented to the atmosphere. This ensures you can achieve the desired sound while maintaining smooth engine operation. The valve utilizes GFB's proprietary Turbo Management System (TMS) technology, which is engineered to provide rapid boost recovery during gear shifts and significantly sharper throttle response. Built to handle extreme boost levels, the Respons is pressure-tested to withstand 100 psi or more, making it suitable for any turbocharger configuration.

• TMS Technology: Optimized for faster boost recovery and improved throttle response during gear changes.
• Adjustable Venting: Patented bias adjustment allows for a customizable atmosphere-to-recirculation ratio to prevent engine stumbling.
• High Pressure Capability: Engineered and tested to hold boost pressures exceeding 100 psi.
• Vehicle Fitment: Replaces factory valves on 1998-2005 Subaru Impreza, Legacy, and Forester XT models.
• Manufacturer Part Number: T9000

Fits 2004-2021 Subaru WRX STI, including Impreza WRX STI, Limited, S209, and Type RA models.

The GFB WGA Wastegate Actuator (MPN 7305) delivers precise boost management for the Subaru WRX STI platform. Utilizing an industry-first Silicone/Nomex diaphragm with a specialized bead retention design, this actuator achieves a large effective area within a compact diameter. This provides maximum control authority over the wastegate flap for faster spool-up and stable boost pressure across the RPM range.

Engineered for high-performance applications, the WGA features an 18mm rod stroke—the longest available for internal actuators—allowing it to manage large wastegate ports or provide extended preload range. The turnbuckle adjustment system allows you to fine-tune base boost pressure in minutes without removing the actuator or swapping springs. Note: This product requires a vehicle-specific engine recalibration (tune) for safe operation.

• Spring Pressure: Includes 3 stainless steel springs for combinations ranging from 5psi to 22psi.
• Premium Construction: PEEK encapsulated spherical rod guide offers superior wear resistance and low-friction movement.
• Adjustability: Integrated turnbuckle for easy preload adjustment and precise base boost settings.
• Compact Profile: Designed with the shortest actuator body on the market to ensure clearance in tight engine bays.
• Part Number: 7305