GFB - Go Fast Bits Diverter Valve

GFB Go Fast Bits Diverter Valves: Engineered for Real Performance Gains

When it comes to diverter valves, few names carry as much engineering credibility as GFB – Go Fast Bits. Founded in Australia in the late 1990s by a mechanical engineer who was simply unsatisfied with what the aftermarket had to offer, GFB built its reputation on a straightforward philosophy: Performance Without Compromise. Nowhere is that philosophy more evident than in their purpose-built diverter valve lineup.

The DV+ Range: Smarter Than a Full Replacement

GFB's DV+ diverter valve range offers a direct-fit performance solution for the weak factory diverter valves used on many modern vehicles. What sets the DV+ apart from competing aftermarket options is its elegant approach: rather than discarding the entire factory diverter valve system, the DV+ keeps what works and replaces what doesn't — retaining the factory solenoid and ECU control to ensure simple installation and reliable operation.

The weak point in most OEM setups is the valve mechanism itself. GFB's DV+ solves this problem by replacing the valve parts with an anodised billet aluminium housing, fitted with a brass piston machined to exacting tolerances. This combination ensures sharper throttle response, lightning-fast valve actuation, and the ability to handle high boost pressures — all without complex modifications or additional parts.

Patented TMS Technology: The Science Behind the Speed

At the heart of every GFB diverter valve is the brand's proprietary Turbo Management System (TMS) technology. The DV+ features a carefully selected spring rate AND spring pre-load adjustment, allowing it to operate progressively to sharpen throttle response — the basis of GFB's TMS principle, which has been shown to reduce the time to peak boost on gearshift by 30%.

GFB's DV+ design solves the longevity and boost leaking issues that are common with factory diverter valves, and also changes the operation method to "pilot actuation" to ensure better performance on stock or modified engines. This feature improves on the factory system by opening the valve progressively in response to boost pressure, so it only opens as much as required — unlike the factory valve, which simply opens and shuts and cannot partially open if boost pressure is low — resulting in better throttle response.

Why Factory Diverter Valves Fall Short

Understanding why you'd upgrade starts with knowing where OEM valves fail. Factory diaphragms are weak and known to rupture, especially if boost has been increased, causing the valve to no longer hold boost pressure. The plastic lip surrounding the diaphragm can break off, potentially ending up going through the turbo. The DV+ replaces plastic valve parts with metal for reliability and strength, particularly on tuned or chipped engines.

The Mach 2: Silent Performance, Zero Compromise

For drivers who want all the performance benefits of a diverter valve upgrade without any additional sound, GFB also offers the Mach 2. Using GFB's TMS technology, the Mach 2 can help return the engine to peak boost up to 30% faster than a factory diverter valve when shifting gears, and is available in a range of universal and bolt-on kits for most popular turbo models. The Mach 2 is configured as a 100% recirculating valve — a direct factory replacement — for when you want all the performance without the noise.

Whether you drive a VW, Audi, Ford, Mercedes-Benz, Volvo, or another modern turbocharged vehicle, GFB's diverter valve lineup offers a vehicle-specific, engineered solution that outperforms the factory hardware without requiring invasive modifications. Explore the full GFB brand catalog or browse all diverter valves to find the right fit for your build.