Australian-engineered boost control and pressure-management hardware for selected European turbo cars - from quiet DV+ upgrades to adjustable valves, wastegates and fuel-pressure regulators.
Go Fast Bits - better known as GFB - is an Australian performance brand specialising in turbo-management hardware. Euro Car Upgrades offers a selected GFB range focused on European turbocharged vehicles, including direct-fit diverter valves, atmosphere-venting and adjustable blow-off valves, wastegate hardware, boost-control components and fuel-pressure regulators.
Our range is deliberately focused on products relevant to supported Audi, Volkswagen, Škoda, Cupra, BMW, MINI, Mercedes-Benz, Porsche, Volvo and other European applications. Always check the individual listing because fitment, valve operation and included hardware vary by vehicle and part number.
Shop GFB Parts for European Performance Cars
Explore the GFB products currently available through Euro Car Upgrades.
Browse the Full Listed GFB Range
GFB Turbo-Management Products
Diverter Valves and DV+
A diverter valve releases pressure from the intake system when the throttle closes and recirculates the discharged air back into the turbo intake. This helps manage pressure during gear changes and sudden throttle lift while keeping operation relatively quiet.
GFB's DV+ range is designed for selected vehicles with factory electronic diverter valves. Depending on the part number, the design either retains the original electronic solenoid or replaces the complete original valve with an integrated-solenoid unit.
GFB uses precision-machined metal valve components and a pilot-actuated design on supported DV+ products. The purpose is functional performance rather than maximum sound, with potential benefits including improved boost holding, progressive valve operation, sharper response and faster boost recovery after a gear change.
Blow-Off Valves and Adjustable Sound
Atmosphere-venting blow-off valves release some or all discharged boost pressure outside the intake system, creating the recognisable venting sound associated with modified turbocharged cars.
GFB offers several approaches for supported vehicles:
- VTA - atmosphere-venting operation for applications where audible valve sound is the priority.
- DVX - combines DV+-style performance principles with adjustable recirculation and atmosphere venting.
- Respons - adjustable venting bias on selected applications.
- Deceptor Pro - electronically adjustable venting on compatible systems.
The sound level varies with boost pressure, intake design, engine configuration and valve adjustment. A product should be selected by exact vehicle compatibility rather than sound preference alone.
Diverter Valve or Blow-Off Valve?
Choose a Plumb-Back Diverter Valve If:
- You prefer quiet or near-factory operation
- Your priority is valve sealing, response and reliability
- You want the discharged air recirculated into the intake
- You do not want a pronounced atmosphere-venting sound
- A compatible direct-fit DV+ is available for the vehicle
A plumb-back valve is normally the better choice when performance and factory-style behaviour matter more than noise.
Choose an Atmosphere or Adjustable Valve If:
- You want an audible boost-release sound
- You want to adjust the balance between recirculation and venting
- A compatible VTA, DVX, Respons or Deceptor product is available
- The vehicle's airflow measurement and engine-management strategy support the selected configuration
Do not assume that a universal atmosphere-venting valve will operate correctly on every European turbo engine.
Wastegates and Boost Control
The wastegate controls how much exhaust energy reaches the turbocharger turbine. Opening the wastegate bypasses part of the exhaust flow and helps regulate turbo speed and boost pressure.
Modified turbo systems can expose limitations in the original wastegate actuator or boost-control arrangement. Depending on the application, this may appear as:
- Boost dropping at higher engine speeds
- An unstable boost curve
- Difficulty reaching the intended boost target
- Inconsistent control after turbo or exhaust changes
GFB produces internal wastegate actuators, external wastegates, manual boost controllers and electronic boost-control equipment for suitable applications. Spring pressure, actuator travel, plumbing and ECU strategy must be considered before changing any of these components.
Fuel-Pressure Regulators
Fuel-pressure control becomes increasingly important when a modified engine requires more fuel flow than the original system was designed to supply.
GFB manufactures adjustable fuel-pressure regulators and related fittings for properly planned performance fuel systems. A regulator needs to be selected according to the actual system, including:
- Fuel type
- Required fuel flow
- Base pressure
- Boost-reference requirements
- Fuel-pump and injector capacity
- Fuel-rail and return-line configuration
- Port, hose and fitting compatibility
An aftermarket regulator is not an automatic improvement for a standard fuel system. It should be installed as part of a correctly designed fuel-system upgrade and calibrated where required.
Australian Performance Engineering
GFB describes its products as proudly Australian and manufactured in accordance with an ISO 9001 quality-management system. The company develops blow-off and diverter valves, boost controllers, wastegates, fuel-pressure regulators and other performance components from its Australian operation.
For European vehicles, an important strength of the range is the number of application-specific products designed around factory electronic valves, solenoids and mounting locations rather than relying only on universal fitment.
Depending on the product, this can include:
- Direct bolt-on mounting
- Retention of factory electronic control
- Integrated-solenoid replacement valves
- Machined metal valve components
- Adjustable recirculation and venting
- Serviceable components and replacement parts
European Applications
Our GFB range is focused on European turbocharged vehicles. Depending on the current products listed, supported applications may include:
- Audi - selected A, S, RS, TT and Q models
- Volkswagen - selected Golf GTI, Golf R, Polo GTI, Passat, Tiguan and other turbo models
- Škoda - selected Octavia RS, Superb and other TSI applications
- Cupra and SEAT - selected Leon, Formentor, Ateca and related applications
- BMW - selected turbocharged BMW and M Performance engines
- MINI - selected Cooper S and John Cooper Works applications
- Mercedes-Benz - selected turbocharged and AMG applications
- Porsche - selected turbocharged applications
- Volvo - selected turbocharged models
Compatibility depends on the exact model, engine, production year and original valve or turbo arrangement. The vehicle badge alone is not enough to confirm fitment.
Compatibility and ECU Tuning
Check Before Ordering
- Vehicle make, model and generation
- Production year
- Engine code or engine family
- Factory diverter-valve and solenoid type
- Turbocharger and wastegate arrangement
- Whether the product is recirculating, atmosphere venting or adjustable
- Whether additional fittings, adaptors or controllers are required
GFB products can look similar while using different mounting patterns, solenoids and internal configurations. Confirm the exact part number against the product listing.
When Tuning May Be Required
A vehicle-specific diverter valve or blow-off valve does not automatically require an ECU remap. Tuning may be needed when a modification changes:
- Boost targets
- Wastegate spring pressure or actuator behaviour
- Boost-control solenoid operation
- Turbocharger airflow capability
- Fuel pressure or fuel-system configuration
- Fuel-pump or injector capacity
Boost-control and fuel-system changes should be planned together with the calibration rather than installed as isolated parts.
Read About GFB Performance Parts
Frequently Asked Questions
What does GFB stand for?
GFB stands for Go Fast Bits, an Australian performance brand specialising in turbo-management and related performance hardware.
What is the difference between GFB DV+, DVX and VTA?
DV+ is primarily a recirculating performance diverter-valve upgrade. DVX adds adjustable venting and sound control to supported applications. VTA is intended to provide atmosphere-venting sound on compatible vehicles.
Will a GFB blow-off valve fit my vehicle?
Only when the exact product is listed for the vehicle, engine and original valve arrangement. Do not order based only on engine capacity or the appearance of the original valve.
Does a GFB diverter valve add more power?
A diverter valve is not a conventional power-adding modification. Its role is to manage pressure during throttle changes. Benefits may include improved sealing, response, boost recovery and consistent operation where the original valve is a limitation.
Will a DV+ make a loud blow-off sound?
DV+ is designed primarily for performance and recirculates discharged air, so it is generally quieter than an atmosphere-venting valve. Intake modifications may make its operation more audible.
Do I need ECU tuning after installing a GFB valve?
A compatible direct-fit valve does not automatically require tuning. Wastegate, boost-controller, turbocharger and fuel-system changes may require ECU calibration depending on the application.
Are all GFB products made for road use?
Road-use suitability depends on the product, vehicle and local noise or modification rules. Atmosphere-venting valves, boost changes and other performance modifications may be restricted in some jurisdictions.
Do you sell every product GFB manufactures?
No. Euro Car Upgrades offers a selected GFB range focused on European turbocharged vehicles and relevant universal performance components.
Find the Correct GFB Product
Use the product range and vehicle information to identify the correct valve, wastegate, boost-control or fuel-management component for your car.
Check the engine, production year and original hardware carefully before ordering.