GFB Diverter Valve Guide: DV+, DVX & Mach 2 Explained

19 Ekim 2026

When it comes to upgrading your turbocharged vehicle, few components offer as much bang-for-your-buck as a high-quality diverter valve. Whether you're chasing sharper throttle response, improved boost retention, or that signature blow-off sound, GFB (Go Fast Bits) has a solution tailored to your needs.

With the largest and most advanced range of diverter and blow-off valves on the market, GFB’s lineup includes DV+, VTA, DVX, SV52, MACH2, HYBRID, RESPONS, and DECEPTOR PRO II. But which one is right for you?

Let’s break down the differences to help you make an informed choice. If you're looking to purchase a GFB diverter valve, check out our brand page here!

Why You Need to Upgrade Your Factory Diverter Valve

Modern turbocharged engines, including popular tuning platforms like the VW/Audi EA888, Ford EcoBoost, and BMW N55 rely on electronic diverter valves to manage boost pressure when you lift off the throttle. However, the factory units fitted by OEMs are built down to a price point, relying on weak rubber diaphragms or lightweight plastic plungers.

Here is why replacing your factory diverter valve is a mandatory step when modifying your car:

Preventing "Silent" Boost Leaks: Once you map your ECU to Stage 1 or Stage 2, target boost pressure increases significantly above factory levels. Under this higher load, OEM plastic pistons flex and rubber diaphragms tear or fail to seal completely. This allows boost pressure to bleed off silently, robbing you of peak horsepower and torque without always triggering a Check Engine Light (CEL).
Fixing High-RPM Pressure Bleed: Factory diverter valves rely solely on a weak internal spring and electronic solenoid to hold boost. Under heavy load or near redline, the high manifold pressure physically forces the stock valve open, causing boost to drop off dramatically in the upper rev range.
Eliminating Turbo Lag Between Shifts: Stock valves operate like a crude on/off switch, dumping all charge air out of the intercooler pipework the moment you lift off the accelerator. When you get back on the throttle, the turbocharger has to rebuild that lost pressure from zero. Upgrading to a pilot-actuated valve preserves charge pressure, keeping the turbo spooled for instant throttle response upon gear changes.
Curing Heat Degradation: Positioned directly on or near the hot turbocharger housing, stock plastic and rubber components suffer severe thermal fatigue over time, becoming brittle and cracking under high heat cycles.

GFB DV+ – OEM Upgrade, No Nonsense

Best for: Drivers who want performance without the noise.
Key benefits: Retains factory ECU control, improves boost holding, and eliminates common OEM valve issues.
Sound level: Quieter operation.
Why choose it: Ideal for those who want a stealthy upgrade with tangible performance gains and zero fuss.

GFB VTA – Performance with Sound

Best for:Enthusiasts who want that classic blow-off valve whoosh.
Key benefits: Vents to atmosphere for maximum sound, while maintaining performance.
Sound level: Loud.
Why choose it: Perfect for those who want their turbo to announce itself at every gear change.

GFB DVX – Volume Control Meets Performance

Best for:Tuners who want flexibility.
Key benefits: Adjustable venting bias lets you control how much air vents to atmosphere vs recirculation.
Sound level: Customisable.
Why choose it: Offers the best of both worlds, performance and tunable sound

GFB SV52 – Compact Power

Best for: Space-conscious builds.
Key benefits: High flow in a compact design, with improved boost holding.
Sound level: Moderate.
Why choose it: A newer addition to the range, ideal for tight engine bays without compromising performance.

GFB MACH2 – Recirculation or Atmospheric

Best for: Versatile setups.
Key benefits: Single outlet valve that can be configured for either recirculation or atmospheric venting.
Sound level: Depends on setup.
Why choose it: A flexible option for those who may change their setup later

GFB HYBRID – Three Valves in One

Best for: Cars with sensitive ECUs or MAF sensors.
Key benefits: Dual outlet design balances sound and drivability, reducing backfiring and stalling.
Sound level: Balanced.
Why choose it: Combines the benefits of recirc and atmospheric venting for a smarter solution.

GFB RESPONS – The Evolution of Dual-Outlet BOVs

Best for: Drivers who want control over sound and performance.
Key benefits: Patented Venting Bias Adjustment System for infinite sound tuning.
Sound level: Adjustable.
Why choose it: Ideal for cars with sensitive engine management systems — tune the sound without sacrificing drivability

GFB DECEPTOR PRO II – In-Cabin Control

Best for: Tech-savvy enthusiasts.
Key benefits: Electronic sound adjustment from inside the cabin.
Sound level: Fully adjustable at your fingertips.
Why choose it: The ultimate in convenience and control, change your valve’s behaviour on the fly.

GFB DV+ vs. GFB DVX: Which Should You Choose?

Go Fast Bits (GFB) offers two industry-leading options to replace your weak factory diverter valve. Both utilize GFB’s patented pilot-actuated brass piston technology, meaning they are physically incapable of leaking boost, no matter how much pressure your turbo produces.

The main decision comes down to sound and venting style:

                       ┌─────────────────────────┐
                       │  Which GFB Valve Suits  │
                       │       Your Build?       │
                       └────────────┬────────────┘
                                    │
                     Is blow-off sound important?
                                    │
                   ┌────────────────┴────────────────┐
                   ▼                                 ▼
                [ NO ]                            [ YES ]
                   │                                 │
                   ▼                                 ▼
         ┌───────────────────┐             ┌───────────────────┐
         │      GFB DV+      │             │      GFB DVX      │
         ├───────────────────┤             ├───────────────────┤
         │ • 100% Recirc     │             │ • Dual Venting    │
         │ • Completely Quiet│             │ • Adjustable Sound│
         │ • OEM+ Stealth    │             │ • Blow-Off Dump   │
         └───────────────────┘             └───────────────────┘

The Round Up: Performance Without Compromise

All GFB diverter valves feature Turbo Management System (TMS) technology, designed to reduce lag, sharpen throttle response, and maintain boost pressure during gear changes. Whether you're building a stealthy sleeper or a track-ready beast, GFB offers a valve that fits your goals.