GFB Diverter Valve for Audi S4/S5/RS4/RS5 (T9380)

Upgrade your Audi RS5 with the Go Fast Bits DV+ diverter valve for superior boost holding durability and throttle response. Unlike the earlier generation diverter valves, the newer generation valves cannot be disassembled and integrated into a DV+. Therefore, GFB developed the T9380 with a low-profile integrated solenoid as a complete replacement for the newer generation valves, enabling a hassle-free installation with no clearance issues. GFB’s DV+ range provides a direct-fit performance solution, replacing weak factory diverter valves on many modern vehicles.

Vehicle Fitment:
2018+ AUDI RS5 (B9 2.9TFSI)
2017+ AUDI RS4 (B9 2.9TFSI)
2016+ AUDI S4 (B9)
2017+ AUDI S5 (B9 3.0TFSI )

Purchase Includes:
Diverter Valve
Harness
Mounting Bolts

Features:
• Sharper throttle response
• Faster boost recovery on gearshift
• Solves boost leaking issues
• Built to last
• Direct replacement for weak OEM DV
• Faster boost recovery after a gearshift or brief throttle lift
• Unrivalled longevity, backed by our Lifetime Warranty

More Info:
Improved Boost Holding
Since electronic OEM diverter valves first appeared in the mid-2000s, there have been many revisions over the years in an attempt to address reliability issues. Whilst the latest generation of OEM diverter valves have become more reliable, there is always a performance trade-off due to their operational method and plastic construction.

When GFB engineers performed boost leak testing on the OEM diverter valve in a VW Mk8 Golf R, they found the leak was significantly larger than in earlier generations.

This excessive leaking is due to the emerging trend of manufacturers mounting diverter valves remotely on plastic piping rather than directly on the turbocharger. A plastic valve mechanism closing onto a plastic seat resulted in the largest OEM diverter valve leak we’ve seen yet at 28L/min at 1 Bar of boost.

Even with the Viton face seal (featured on all DV+ pistons), the plastic OEM seat face was found to be so uneven that it was impossible to achieve a reliable seal. The T9380 successfully addresses this issue by incorporating an integral piston seat machined into its body. This design ensures a proper seal, even on uneven plastic OEM seats.

Sharper throttle response, faster boost recovery after brief throttle lift
Factory electronic diverter valves are binary in operation – they’re either open or shut. Your throttle, however, isn’t. When you make small throttle adjustments, the binary operation of the factory diverter results in abrupt changes in power delivery, which is the very definition of poor throttle response.

The DV+ patented “pilot actuation” system allows the piston to open and close progressively, thereby smoothing the power delivery during throttle modulation, and ultimately improving throttle response.

Unrivaled longevity, backed by our Lifetime Warranty
The combination of precision manufacturing, attention to detail, and robust materials mean the DV+ will last a lifetime. So does the warranty!

Other Vehicles:
2017+ AUDI SQ5
2017+ AUDI A8
2017+ AUDI A7
2018+ AUDI Q8
2019+ AUDI A6
2021+ AUDI Q7
2020+ AUDI S6
2020+ AUDI S7
VW Golf GTI Mk8
2021+ VW Arteon
VW Golf R Mk8

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