GFB - Go Fast Bits Turbocharger Diverter Valve

GFB Go Fast Bits: Engineering Smarter Turbocharger Diverter Valves

Go Fast Bits (GFB) has built its reputation around a straightforward philosophy: Performance Without Compromise. Nowhere is that philosophy more evident than in the brand's flagship turbocharger diverter valve lineup — the DV+ range. Rather than simply replacing the entire OEM diverter system with a traditional pneumatic setup, GFB's engineers took a more precise and thoughtful approach.

The DV+ Difference: Smarter, Not Just Stronger

GFB's DV+ diverter valve range offers a direct-fit performance solution for the weak factory diverter valves used on many modern vehicles. The key insight behind the design is identifying what actually fails. The solenoid coil from the factory-fitted valve is highly capable — the ECU opens it faster than any pneumatic valve — but the weak point is the valve mechanism itself. GFB's DV+ solves this by replacing just the valve parts with an anodized billet aluminum housing fitted with a brass piston machined to exacting tolerances.

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. By contrast, other manufacturers' products involve replacing the entire system with a traditional pneumatic valve, requiring long vacuum hose runs, additional parts for tapping into the intake manifold vacuum, plus either a different solenoid valve to actuate the pneumatic valve or a ballast resistor to plug into the OE wiring loom.

Proven Engineering on Real-World Platforms

GFB's diverter valve lineup spans a wide range of popular turbocharged platforms. The T9380 is a key addition to the DV+ range from GFB, specifically designed as a complete replacement for the newer generation of OEM diverter valves found in late-model VW and Audi vehicles. Meanwhile, the T9384 is another addition to the DV+ range, designed as a complete drop-in replacement for the OEM diverter valve in late-model Ford vehicles.

GFB's engineering team doesn't just swap parts — they test rigorously. When GFB engineers performed boost leak testing on the OEM diverter valve from a 2.3 EcoBoost Bronco, they found the leak was significantly larger than in earlier generations — due to the emerging trend of manufacturers mounting diverter valves remotely on plastic intercooler piping — resulting in a leak as large as 28L/min at 1 Bar of boost. The T9384 successfully addresses this issue by incorporating an integral piston seat machined into its body, ensuring a proper seal even on uneven plastic OEM seats.

Turbo Management System (TMS) Technology

All of GFB's blow-off and diverter valves feature Turbo Management System (TMS) technology — a method of controlling the flow rate of the air released by the valve to help maintain boost pressure in the intercooler wherever possible when the throttle is closed, delivering higher boost upon reopening the throttle for instant response and up to 40% more boost throughout the spool-up process. In practical terms, fitting a GFB valve with TMS technology can sharpen throttle response and reduce lag, especially during a gearshift, reducing the time it takes to return to peak boost after lifting off the throttle.

The DV+ is documented to deliver 10% faster opening and 50% faster closing than the factory diverter valve. For turbocharged enthusiasts who want measurable performance gains without ripping out OEM infrastructure, GFB's diverter valves represent one of the most focused upgrades available. Explore the full GFB brand catalog or browse all turbocharger diverter valves to find the right fit for your build.