The HKS Super SQV4 (Super Sequential Blow Off Valve) utilizes a unique sequential valve structure and a differential pressure control system, allowing for stable operation across a broad range of boost levels. This universal assembly is designed to prevent boost leaks using a pull-type relief valve mechanism that remains tightly sealed under pressure, unlike traditional push-type valves that can be forced open by high intake charge.

• High-rigidity aluminum die-cast body with a durable silver-coated finish
• Triple-fin design produces the iconic, high-frequency HKS blow-off sound
• Pull-type relief valve design ensures the valve stays shut during high boost conditions
• Dual-valve sequential structure provides rapid response and high flow capacity
• Includes O-ring, C-clip, T-fittings, and vacuum filter for custom installation
• Manufacturer Part Number: 71008-AK001

Fits 2017-2019 Honda models equipped with L15C and L15B engines.

The HKS Super SSQV4 (Super Sequential Blow Off Valve) utilizes a unique sequential valve structure and a differential pressure control system, which allows for a broad operating range from low to high boost. Unlike typical push-type blow-off valves, the SSQV4 pull-type relief design ensures stable operation regardless of boost pressure, preventing valve leakage and ensuring the valve remains closed under high-load conditions.

This kit (MPN: 71008-AH011) is engineered specifically for the L15 turbocharged engine platform. It is supplied without a recirculation tube, intended for atmospheric discharge to provide the signature HKS high-frequency blow-off sound via the integrated triple-fin design. The assembly features a high-quality nickel-plated die-cast aluminum secondary valve and a primary valve made of heat-resistant plastic for long-term durability and precise actuation.

• Sequential pull-type valve prevents boost leaks and ensures rapid response
• Die-cast aluminum body with a high-rigidity metal structure
• Includes vehicle-specific flange, vacuum lines, and hardware for installation
• Signature HKS triple-fin sound design
• Manufacturer Part Number: 71008-AH011

Fits 2017-2021 Honda Civic Type R (FK8).

The HKS Super SQV 4 (Sequential Blow Off Valve) utilizes a unique pull-type relief structure and a differential pressure control system to manage boost pressure across a wide operating range. Unlike conventional push-type blow off valves that can leak under high boost, the HKS pull-type design ensures the valve remains tightly sealed as pressure increases, providing reliable performance for the K20C1 engine. This kit is a vehicle-specific solution, engineered to bolt directly to the FK8 platform for improved throttle response and the signature HKS sequential sound.

• Manufacturer Part Number: 71008-AH009
• Pull-type relief valve design eliminates boost leaks under high pressure
• Dual-stage sequential valve structure for precise operation at all boost levels
• High-stiffness die-cast aluminum body with a premium silver finish
• Includes vehicle-specific mounting brackets, vacuum hoses, and installation hardware
• Direct replacement for the factory recirculation valve

The HKS Super SQV 4 Return Kit Plus is engineered specifically for the Subaru Levorg (VMG/VM4 chassis) to convert the atmospheric HKS Sequential Blow-Off Valve into a recirculating setup. By routing discharged air back into the intake (suction) side of the turbocharger, this kit ensures the engine's Mass Air Flow (MAF) sensor maintains accurate readings during gear shifts and throttle lift-off.

Recirculating the blow-off air is critical for modern turbocharged vehicles to prevent rich-condition stumbling, stalling, or erratic idling that can occur with atmospheric venting. This "Plus" kit includes the necessary suction return pipe and hardware designed for a precise fit within the VMG and VM4 engine bays.

• Direct fit for Subaru Levorg VMG and VM4 chassis
• Compatible with HKS Super SQV 4 series blow-off valves
• Maintains proper air-fuel ratios by recirculating air into the intake
• Includes high-quality suction return piping and installation hardware
• Manufacturer Part Number: 71008-AF015

The HKS Super SQV 4 (Super Sequential Blow-Off Valve) utilizes a unique sequential valve structure and a differential pressure control system to manage boost across a broad operating range. This specific kit, designed for the 2008-2014 Subaru Impreza WRX STI (GRB/GRF), includes the Return Kit to facilitate air recirculation back into the intake stream, maintaining proper MAF sensor readings and engine drivability.

Unlike traditional push-type valves that can leak under high boost, the HKS pull-type relief design ensures the valve remains tightly sealed as boost pressure increases. The aluminum die-cast body features a silver-coated finish for durability and a professional under-hood appearance.

• Fits 2008-2014 Subaru Impreza WRX STI (GRB/GRF) models.
• Dual-stage sequential valve provides rapid response at low and high boost pressures.
• Includes return suction pipe and necessary hardware for recirculation setup.
• Triple-fin design creates the signature HKS high-frequency discharge sound.
• Direct bolt-on fitment for the specified Subaru chassis.
• Manufacturer Part Number: 71008-AF013V

Fits 2008-2011 Subaru Impreza WRX STI models.

The HKS Super SQV4 (Sequential Quality Valve) utilizes a unique sequential valve structure and a differential pressure control system to manage boost across a broad operating range. Unlike standard push-type blow-off valves that can leak under high boost, the SSQV4 features a pull-type relief design that remains closed under pressure, ensuring stable operation and preventing compressor surge during sudden throttle lifts. This vehicle-specific kit is engineered to bolt directly to the factory intercooler location for a secure, leak-free installation.

• Dual-stage sequential valve improves throttle response across all boost levels
• Pull-type valve design prevents boost leaks even at high pressure
• High-rigidity die-cast aluminum body with a silver finish for long-term durability
• Triple-fin design produces the iconic HKS high-frequency discharge sound
• Complete kit includes SSQV4 valve, vehicle-specific adapter flange, O-ring, and C-clip
• Manufacturer Part Number: 71008-AF013

Fits 2008-2010 Subaru WRX and 2005-2006 Subaru Legacy 2.5GT.

The HKS Super SQV4 (Super Sequential Blow Off Valve) utilizes a unique pull-type relief structure and a differential pressure control system. Unlike typical push-type blow off valves that can leak under high boost, the SSQV4 remains closed during boost because the pressure actually holds the valve against its seat. This design allows for a broad operating range, maintaining stable performance from low-vacuum environments to high-boost applications.

This vehicle-specific kit (MPN: 71008-AF012) is engineered for a direct fit, replacing the factory bypass valve with a high-quality aluminum die-cast body. The included triple-fin design produces the signature HKS high-frequency sound during discharge, providing both audible feedback and performance reliability.

• Dual-stage sequential valve for optimal response across the RPM range
• Pull-type valve operation eliminates boost leaks under high pressure
• High-quality silver-coated aluminum die-cast body for durability
• Includes vehicle-specific mounting flange, O-ring, and snap ring
• Manufacturer Part Number: 71008-AF012

Fits 2002-2007 Subaru WRX and 2004-2007 Subaru WRX STi (2.0L / 2.5L).

The HKS Super Sequential Blow Off Valve IV (SSQV4) is engineered to prevent boost leaks and compressor surge on your EJ-series engine. Unlike traditional push-type valves that can be forced open by high boost pressure, the HKS SSQV4 features a unique pull-type relief structure. This design ensures that the valve remains tightly sealed as boost pressure increases, maintaining system integrity under heavy load.

Constructed from a nickel-plated, die-cast aluminum body with a secondary valve for improved low-boost response, this kit provides both reliability and the signature HKS triple-fin sound. This application-specific kit includes a vehicle-specific mounting flange, allowing for a direct bolt-on installation to the factory intercooler location without the need for custom fabrication.

• Manufacturer Part Number: 71008-AF006
• Pull-type valve design prevents boost-induced leakage
• Dual-stage valve structure for precise operation across the RPM range
• High-rigidity nickel-plated die-cast aluminum housing
• Includes vehicle-specific flange, snap ring, O-ring, and vacuum fittings

The GReddy Type FV2 (Floating Valve) Universal Blow Off Valve represents the latest evolution in turbocharger pressure management. This unit features a unique floating valve design that prevents the valve from opening prematurely under high vacuum conditions, such as idling or light throttle, which effectively eliminates stalling and erratic idle issues common with lesser valves.

Built with a CNC-machined aluminum body, the Type FV2 utilizes a dual-spring system and an adjustable top hat to fine-tune the discharge timing. This ensures rapid valve response and high flow capacity to protect your turbocharger from compressor surge during gear shifts and sudden deceleration. Because it is a universal component, this BOV requires a vehicle-specific adapter or weld-on flange for installation.

• Manufacturer Part Number: 11501666
• Floating Valve structure prevents leaking and stalling at idle
• Compatible with standard GReddy 2-bolt BOV flanges (Type RS/RZ/S)
• Hand-adjustable spring tension for precise boost response
• High-flow design suitable for various boost levels
• Includes vacuum hose, T-fittings, and hardware for installation

Fits select 2010-2017 Hyundai Genesis Coupe, Sonata, Tucson, Veloster, and Kia Forte, Optima, Sorento, and Sportage (2.0T / 1.6T).

The GFB DVX T9661 is engineered specifically for Hyundai and Kia turbocharged applications where space is at a premium and standard aftermarket valves often struggle to fit. This valve utilizes GFB's patented venting bias adjustment, which allows you to infinitely tune the air distribution between the recirculation port and the atmospheric outlet. This gives you total control over the sound—ranging from silent factory-style operation to a loud, aggressive blow-off blast—all without triggering ECU errors or causing stalling issues.

• Patented venting bias adjustment for customizable sound levels
• Infinite adjustment between full recirculation and full atmospheric venting
• Direct bolt-on replacement for the factory diverter valve
• Billet construction designed to hold high boost pressure without leaking
• Engineered for 1.6T and 2.0T Gamma and Theta engines
• Manufacturer Part Number: T9661

Fits select 2013-2020 Audi A3, S3 and Volkswagen GTI, Golf R.

The GFB DVX Performance Diverter Valve T9659 provides total control over your vehicle’s boost venting and acoustics. Engineered for late-model VAG engines where space constraints prevent the use of larger valves, the DVX incorporates GFB’s patented venting bias adjustment. This system allows you to infinitely vary the airflow between the recirculating outlet and the atmosphere outlet, giving you the choice between silent factory operation, a loud blow-off sound, or a specific blend of both.

Constructed to replace the often-unreliable factory electronic solenoid, the T9659 uses a heavy-duty piston design that remains closed under high boost while maintaining sharp throttle response. It integrates directly with the factory ECU control, ensuring the vehicle's computer maintains authority over valve operation without the risk of diaphragm failure or boost leaks.

• Manufacturer Part Number: T9659
• Patented venting bias adjustment for customizable blow-off sound levels
• Dual outlet design supports simultaneous recirculation and atmospheric venting
• CNC-machined housing designed for tight engine bay fitment
• Piston-driven mechanism for superior pressure handling compared to OE diaphragms
• Maintains ECU-controlled operation for seamless performance integration

Fits select 2004-2018 Ford Focus ST, Porsche 911 Turbo/GT2 RS, and Volvo T5 models (C30, C70, S40, V50), as well as Borg-Warner EFR turbochargers.

The GFB DVX T9654 provides a high-performance alternative for vehicles with tight engine bays that cannot accommodate larger aftermarket valves. Built to replace failure-prone factory plastic diverter valves, this unit features dual outlets and GFB’s patented venting bias adjustment. This allows you to infinitely tune the valve between silent, 100% recirculation and a loud, 100% atmospheric blow-off sound simply by moving the adjustment lever.

• Patented venting bias adjustment for customizable sound levels
• Direct-fit design for compact engine bays and Borg-Warner EFR turbos
• Dual outlets allow for simultaneous recirculation and atmosphere venting
• Improved throttle response and boost recovery between shifts
• Manufacturer Part Number: T9654

Vehicle Fitment

The GFB Deceptor Pro II Blow Off Valve (BOV) kit provides the ultimate solution for drivers who want total control over their vehicle's atmospheric sound levels from inside the cabin. Utilizing a specialized motorized adjustment mechanism, this kit allows you to transition between full recirculation and atmospheric venting on-the-fly.

Beyond sound management, the Deceptor Pro II solves common drivability issues associated with venting air to the atmosphere. By limiting the maximum venting ratio via the in-car controller, you can eliminate the stalling and backfiring caused by rich fuel conditions often found in MAF-equipped vehicles. This allows for a crisp blow-off sound without compromising engine stability.

• In-Car Adjustment: Electronically control venting volume from silent to loud from the driver's seat.
• Venting Ratio Control: Configurable to limit venting to prevent backfiring and stalling.
• Complete Kit: Includes the Deceptor Pro II BOV, in-car controller, and a dedicated wiring loom.
• Manufacturer Part Number: T9533

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

Fits 2018-2022 Kia Stinger GT, GT1, GT2, and GTS (3.3T).

The GFB Deceptor Pro II Combo BOV Kit (T9513) provides total control over your turbocharger’s blow-off sound directly from the driver’s seat. Engineered specifically for the twin-turbo 3.3T V6 engine, this kit utilizes a dual-valve configuration—one Mach 2 valve and one Deceptor Pro II valve—to manage boost pressure while offering on-the-fly volume adjustment.

Beyond the sound, this kit solves common drivability issues like backfiring and stalling that occur when venting too much air to the atmosphere. By using the included electronic controller, you can precisely limit the venting ratio to find the perfect balance between that signature atmospheric sound and smooth engine operation. This makes it an ideal upgrade for Stingers that are sensitive to airflow changes but still want an aggressive blow-off note.

• Manufacturer Part Number: T9513
• Kit includes one Deceptor Pro II valve and one Mach 2 valve
• In-cabin electronic controller for real-time volume adjustment
• Prevents stalling and backfiring by managing atmosphere venting ratios
• Includes complete wiring loom for a direct installation
• Designed for the Kia Stinger 3.3T V6 twin-turbo platform

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

The GFB Deceptor Pro II (T9510) provides complete control over your turbocharger's venting sound directly from the driver's seat. Utilizing a motorized diverter valve, this system allows you to adjust the venting ratio on-the-fly, ranging from silent recirculating operation to full atmospheric venting for that signature blow-off sound.

Built with GFB’s TMS (Turbo Management System) Advantage, this valve is engineered to improve throttle response and reduce boost lag. By keeping the valve closed during gear shifts and partial throttle, it ensures your turbo stays spooled for faster recovery. For vehicles sensitive to atmospheric venting, the controller can be configured to limit the maximum venting ratio, preventing common issues like stalling, stumbling, or backfiring caused by rich fuel mixtures.

• Motorized on-the-fly adjustment of venting volume
• TMS Advantage for faster boost recovery and better throttle response
• Adjustable venting ratio to prevent EFI stalling and backfiring
• Direct bolt-on replacement for the factory valve
• Includes complete wiring loom and in-cabin controller
• Manufacturer Part Number: T9510

Fits select 2001-2020 Subaru Impreza, WRX, WRX STI, and Forester models.

The GFB Deceptor Pro II provides precise control over your blow-off valve volume directly from the driver's seat. Utilizing a motorized drive system, this kit allows you to adjust the venting bias—moving from silent recirculation to a full atmosphere-venting sound, or anywhere in between—on the fly. This eliminates the need to choose between a quiet daily driver and a performance-sounding turbo setup.

Beyond sound, this patented system addresses the technical challenges of venting air to the atmosphere on MAF-equipped engines. By using the in-car controller to limit the maximum venting ratio, you can prevent the rich-running conditions that lead to backfiring and stalling. The Deceptor Pro II offers the signature blow-off sound without sacrificing engine stability or drivability.

• Manufacturer Part Number: T9503
• Adjustment Type: Electronic remote control (included)
• Venting Bias: Fully adjustable from 100% recirculating to 100% atmosphere
• Construction: Precision-machined for high-boost reliability
• Included Components: Blow-off valve unit, in-car controller, and wiring loom

Fits select 2015-2024 Toyota GR Corolla and Lexus GS200t/300, IS200t/300, NX200t/300, and RC200t/300 models.

The GFB VTA (Vent to Atmosphere) T9489 combines the proven performance benefits of the DV+ series with an aggressive blow-off sound. Designed for vehicles with electronically controlled diverter valves, the VTA delivers sharper throttle response and faster boost recovery without the drivability issues common in lesser atmospheric valves. The low-profile integrated solenoid ensures a direct bolt-on installation, fitting seamlessly within the tight constraints of modern engine bays.

Constructed to exacting standards, this Australian-made upgrade replaces the failure-prone factory plastic valve with a high-performance solution capable of holding boost reliably under demanding conditions. By utilizing the factory ECU signal, it maintains perfect integration with the vehicle's engine management system.

• Provides aggressive atmospheric blow-off sound with superior performance
• High-performance solenoid ensures reliable boost holding and durability
• Direct bolt-on replacement for the factory electronic diverter valve
• Improves throttle response and reduces boost lag during shifts
• Compact, low-profile design for simplified installation
• Manufactured in Australia and backed by a lifetime warranty
• Manufacturer Part Number: T9489

Fits select 2014-2024 Ford Bronco, Explorer, Fiesta, Maverick, Mustang, and Ranger (2.3L / 3.0L).

The GFB VTA (Vents to Atmosphere) T9484 delivers the signature aggressive blow-off sound while maintaining the performance benefits of GFB’s ground-breaking DV+ technology. Unlike standard atmospheric valves that can cause sluggish throttle response, the VTA ensures superior boost holding and faster boost recovery between shifts. It is specifically designed to replace the fragile factory plastic diverter valve with a more durable, reliable solution.

Built with a CNC-machined body and a compact, low-profile integrated solenoid, the T9484 is a direct bolt-on upgrade. This design ensures a seamless fit in tight engine bays while eliminating the boost leaks common in OE components. Whether you are running factory boost or a modified setup, the VTA provides the reliability and sound performance enthusiasts demand.

• Delivers aggressive atmospheric venting sound
• Improved throttle response and faster boost recovery
• Maintains reliable boost holding under high-pressure conditions
• Low-profile integrated solenoid for direct-fit installation
• High-grade CNC-machined construction
• Australian-made and backed by a lifetime warranty
• Manufacturer Part Number: T9484

Fits select 2005-2020 Audi, Volkswagen, and Porsche models (2.0T) equipped with the Pierburg-branded factory diverter valve.

The GFB VTA (Venting to Atmosphere) combines the signature blow-off sound enthusiasts crave with the performance-proven technology of the Go Fast Bits DV+ series. Designed as a direct bolt-on replacement for the often-unreliable factory solenoid, the VTA ensures superior boost holding and sharper throttle response by utilizing a pilot-actuated valve mechanism. Unlike the factory plastic valve that can leak or fail under high boost, the VTA is engineered to remain sealed until the optimal moment, providing faster boost recovery during gear shifts.

The T9481 features a low-profile integrated solenoid that eliminates the need for remote mounting or complex hose routing, making installation a straightforward process in tight engine bays. Each unit is manufactured in Australia to exacting tolerances and is backed by a limited lifetime warranty.

• Replaces factory Pierburg-branded diverter valves
• Delivers aggressive atmospheric blow-off sound
• Improved throttle response and faster boost recovery
• Pilot-actuated valve design for superior boost holding
• Low-profile integrated solenoid for direct-fit installation
• CNC-machined construction for durability
• Manufacturer Part Number: T9481
• Backed by a Limited Lifetime Warranty

Fits select 2021-2024 Volkswagen Arteon, Golf R, and GTI models equipped with the Continental-branded OEM diverter valve.

The GFB VTA (Vent to Atmosphere) delivers the aggressive blow-off sound enthusiasts crave while maintaining the proven performance benefits of the DV+ series. By replacing the factory diverter valve with a high-performance atmospheric solution, the T9480 solves common issues with boost leakage and slow throttle response. Its compact design and low-profile integrated solenoid ensure a seamless bolt-on installation, specifically engineered for Mk8 platforms and vehicles utilizing Continental turbochargers.

• Provides an aggressive blow-off sound without sacrificing performance
• Delivers sharper throttle response and faster boost recovery between shifts
• High-strength CNC-machined construction for superior boost holding and reliability
• Direct bolt-on replacement for factory Continental-branded diverter valves
• Low-profile solenoid design ensures clearance in tight engine bays
• Manufacturer Part Number: T9480
• Australian-made and backed by a lifetime warranty

Fits select 2015-2022 Lexus GS, IS, NX, and RC models (2.0L).

The GFB VTA (Vent-to-Atmosphere) blow off valve provides the aggressive sound enthusiasts crave while delivering measurable performance gains. Engineered with Go Fast Bits' proprietary TMS (Turbo Management System) technology, this valve is designed to improve boost recovery by up to 30% during gearshifts, ensuring your turbo stays in its efficiency range longer.

Unlike factory valves that can leak or bleed boost under high pressure, the T9467 is built to maintain maximum boost holding ability throughout the RPM range. It replaces the stock solenoid's internals with precision-machined components for improved durability and response.

• Manufacturer Part Number: T9467
• TMS Technology: Delivers up to 30% faster boost recovery between shifts
• Atmospheric Venting: Provides the signature blow-off sound without triggering CELs
• Direct Bolt-on: Replaces factory components with no additional tuning required
• Performance: Superior boost holding compared to the original equipment (OE) valve

Fits 2019-2022 Ford Ranger Lariat, XL, and XLT models (2.3L).

The GFB VTA (Vent-to-Atmosphere) performance valve provides the signature turbo blow-off sound while maintaining the sophisticated engine management of your modern EcoBoost engine. Unlike many aftermarket valves that trigger check engine lights or poor drivability, the T9465 VTA is engineered specifically for the Ford Ranger 2.3L application. It retains the factory solenoid and ECU control, ensuring the vehicle stays in its intended operating parameters.

This valve features GFB's proprietary TMS (Turbo Management System) technology, which has been shown to provide up to 30% faster boost recovery during gearshifts. This result is achieved by keeping the turbo spinning and ready to deliver boost the moment you get back on the throttle.

• Vent-to-atmosphere design for aggressive blow-off sound
• Retains factory solenoid for full ECU control and integration
• TMS technology for up to 30% faster boost recovery
• Direct bolt-on replacement for the factory diverter valve
• Manufacturer Part Number: T9465

Fits 2011-2021 Ford F-150 and Lincoln Navigator (2.7L / 3.5L).

The GFB VTA (Vent to Atmosphere) valve is engineered specifically for EcoBoost applications where the factory solenoid-type diverter valve often fails to maintain boost pressure or lacks the desired acoustic feedback. By retaining the factory solenoid, the T9464 maintains full ECU control while providing the performance and sound upgrades enthusiasts demand.

• TMS Technology: Engineered for up to 30% faster boost recovery on gearshifts compared to factory valves.
• Direct Replacement: Bolts directly into the factory location, utilizing the original electronics for seamless integration and response.
• VTA Operation: Provides the distinct blow-off sound without causing stalling, backfiring, or engine fault codes.
• Precision Build: Specifically designed for the 2.7L and 3.5L EcoBoost platforms to ensure a perfect fit and high-pressure reliability.
• Manufacturer Part Number: T9464

Fits 2016-2018 Ford Focus RS.

The GFB VTA (Vent to Atmosphere) Performance Valve (T9460) provides the signature blow-off sound enthusiasts crave without sacrificing the driveability or reliability of the Ford Focus RS platform. Unlike basic atmospheric valves that can trigger ECU errors or sluggish response, the GFB VTA is specifically engineered to work in harmony with the factory solenoid-controlled diverter system.

Equipped with GFB's proprietary TMS (Turbo Management System) technology, this valve is designed to deliver up to 30% faster boost recovery during gearshifts. By retaining the factory ECU control of the solenoid, the VTA ensures the computer remains in command of the valve operation, maintaining factory-level diagnostics and protection while providing a crisp, audible vent during throttle lift-off.

• Signature atmospheric blow-off sound without ECU fault codes
• TMS Technology for up to 30% faster boost recovery on gearshifts
• Direct bolt-on replacement for the factory diverter valve
• Retains factory solenoid and ECU control for seamless integration
• CNC machined from high-grade materials for long-term durability
• Manufacturer Part Number: T9460

Fits select 2012-2019 Ford Fiesta ST, Infiniti Q50 and Q60, and Mercedes-Benz C250, C300, CLA250, GLA250, and GLC300 models.

The GFB VTA (Vent to Atmosphere) performance blow-off valve is engineered for drivers who want the signature turbo atmospheric sound without sacrificing the reliability of their factory electronics. Designed specifically for applications using solenoid-type factory diverter valves, the T9458 retains the original solenoid and ECU control to ensure seamless integration and error-free operation.

By utilizing GFB's proprietary TMS (Turbo Management System) technology, this valve is designed to deliver up to 30% faster boost recovery during gearshifts. Unlike basic atmospheric spacers, the VTA is a complete performance upgrade that improves throttle response and ensures the valve remains closed under high boost conditions until venting is required.

• Signature blow-off sound with performance-oriented boost control
• TMS Technology for up to 30% faster boost recovery during shifts
• Retains factory ECU and solenoid control for OE-level integration
• Specifically designed to fit factory mounting points and hardware
• Replaces the plastic internal components of the factory diverter valve
• Manufacturer Part Number: T9458

Fits 2013-2018 Ford Focus ST (2.0L).

The GFB VTA (Vent to Atmosphere) blow-off valve is engineered for drivers who want the signature atmospheric turbo sound without compromising performance or reliability. Unlike generic valves, the T9454 is designed specifically for the Ford Focus ST platform, replacing the factory diverter valve while retaining the original solenoid and ECU control for seamless operation.

Equipped with GFB’s proprietary TMS (Turbo Management System) technology, this valve is designed to deliver up to 30% faster boost recovery during gearshifts. By maintaining better pressure during the transition between gears, it ensures your 2.0L EcoBoost stays in the powerband for improved throttle response.

• Vents to atmosphere for a distinct blow-off sound
• TMS technology offers up to 30% faster boost recovery on gearshifts
• Direct bolt-on replacement for the factory diverter valve
• Retains factory solenoid for full ECU control and integration
• CNC-machined construction for durability under high boost
• Manufacturer Part Number: T9454

Fits select 2006-2020 Audi and Volkswagen models equipped with the 2.0T engine, including A3, A4, A5, A6, Q5, GTI, Jetta, Passat, and Tiguan.

The GFB ATMO DV+ (T9451) is a direct-replacement performance solution for the factory solenoid-actuated diverter valves found in VAG applications. Unlike standard recirculating valves, the ATMO version vents to the atmosphere (VTA) to provide the signature turbo blow-off sound while maintaining the mechanical reliability GFB is known for. It utilizes GFB’s Turbo Management System (TMS) technology, which can provide up to 30% faster boost recovery during gearshifts by keeping the piston closed until boost is actually required to be vented.

By retaining the factory solenoid, this kit ensures the ECU remains in full control of the valve operation, preventing the fault codes often associated with standalone blow-off valves. It replaces the weak plastic internal components of the OE valve with precision-machined hardware designed for high-boost durability and longevity.

• Manufacturer Part Number: T9451
• Vents to Atmosphere (VTA) for audible blow-off sound
• TMS Technology for up to 30% faster boost recovery
• Retains factory solenoid and ECU control for OE-level integration
• Direct bolt-on replacement for factory diverter valves
• High-performance metal piston construction

Fits 2019-2020 Volkswagen Golf (1.2L / 1.4L).

The GFB VTA (Vent to Atmosphere) Performance Blow Off Valve is engineered for drivers who want the signature blow-off sound without sacrificing turbocharger performance. Utilizing GFB's proprietary TMS (Turbo Management System) technology, this valve ensures faster boost recovery during gearshifts and throttle modulation, leading to sharper throttle response. While many factory intake components are designed only to suppress the sound of compressor surge, the VTA T9430 is built to actively manage pressure pulses and protect your engine's turbocharger system.

• Manufacturer Part Number: T9430
• TMS Technology: Optimized for faster boost recovery and improved throttle response.
• Vent-to-Atmosphere: Delivers the distinct, crisp blow-off sound.
• Pressure Management: Designed to handle high-pressure pulses and eliminate compressor surge.
• Direct Fit: Engineered for the 1.2L and 1.4L TFSI/TSI engine platforms.

Fits 2015-2026 Ford Mustang and 2020-present Ford Bronco models equipped with 2.0L, 2.3L, 2.7L, or 3.0L engines. This Go Fast Bits (GFB) Whistling Trumpet is a Vent-to-Atmosphere (VTA) accessory designed to modify the acoustic profile of your compatible GFB blow-off valve.

Engineered for drivers seeking a distinct, high-pitched whistling sound during pressure relief, this trumpet replaces the standard outlet on GFB VTA valves. It features a precision-machined design to ensure a secure fit and consistent performance under boost.

• Delivers a signature high-pitched whistle blow-off sound
• Direct-fit accessory for compatible GFB VTA valve bodies
• Precision-machined construction for durability
• Simple thread-on installation
• Manufacturer Part Number: T9404

Fits select 2014-2021 Volkswagen GTI (Mk7/Mk7.5) and 2014-2020 Audi S3 (8V).

The GFB VTA (Vent to Atmosphere) provides the signature blow-off sound for your turbocharged Audi or Volkswagen without the drivability issues common with generic atmospheric valves. Utilizing GFB's TMS (Turbo Management Solution) technology, this valve is designed to improve throttle response and boost recovery while replacing the failure-prone factory plastic diverter valve diaphragm.

Engineered to work with the factory ECU control, the VTA ensures the piston only opens when necessary, preventing the stalling or rich-running conditions often associated with simple blow-off spacers. The unit features a CNC-machined billet aluminum body and a precision-fit brass piston for superior pressure handling and long-term durability under high-boost conditions.

• Manufacturer Part Number: T9401
• Signature blow-off sound with factory-level drivability
• Billet aluminum construction with brass piston for high-pressure reliability
• Replaces weak factory plastic diverter components
• Direct bolt-on installation to factory mounting points
• TMS technology for improved throttle response and boost retention