Performance - Audi S4 B9 (2015-Present)

The T9380 is the latest addition to the DV+ range of diverter valves from GFB (Go Fast Bits). It is specifically designed as a complete replacement for the newer generation of Continental brand OEM diverter valves found in late-model VW and Audi vehicles. Unlike the earlier generation diverter valves manufactured by Pierburg, the newer Continental 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 Continental diverter valve, enabling a hassle-free installation with no clearance issues. Like all valves in the DV+ range, the new T9380 delivers the following benefits over the OEM diverter valve: T9380 DV+ Improved boost holding Sharper throttle response Faster boost recovery after a gearshift or brief throttle lift Unrivalled longevity, backed by our Lifetime Warranty 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. Unrivalled 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! FITS: Make Model Mark Variant FuelType YearFrom YearTo Audi A4 B9 Avant RS4 quattro Petrol 2017 2024 Audi A4 B9 Avant S4 quattro Petrol 2016 2019 Audi A5 F5 RS5 quattro Petrol 2017 2024 Audi A5 F5 S5 quattro Petrol 2017 2024 Audi A5 F5 S5 quattro Petrol 2016 2024 Audi A5 F5 S5 quattro Petrol 2016 2024 Audi A6 C8 Avant 3.0 55 TFSI Mild Hybrid quattro Hybrid 2018 2024 Audi A6 C8 S6 TFSI Mild Hybrid quattro Plug-In 2020 2024 Audi A6 C8 Saloon / Limousine 3.0 55 TFSI Mild Hybrid quattro Hybrid 2018 2024 Audi A7 4KA 55 TFSI Mild Hybrid quattro Petrol 2017 2024 Audi A8 4N2,4N8,4NC,4NL 50 TFSI Mild Hybrid quattro Plug-In 2018 2024 Audi Q5 SQ5 TFSI quattro Petrol 2021 2024 Audi Q7 4MB 55 TFSI quattro Plug-In 2021 2024 Audi Q8 4MN 55 TFSI e quattro Plug-In 2020 2024 Audi Q8 4MN 55 TFSI Mild Hybrid quattro Plug-In 2018 2024 Skoda Octavia MK4 2.0 TSI RS Petrol 2020 2024 Volkswagen Golf MK8 2.0 GTI Petrol 2020 2024 Volkswagen Golf MK8 2.0 GTI Petrol 2020 2024 Volkswagen Golf MK8 2.0 GTI Petrol 2021 2024 Volkswagen Golf MK8 2.0 GTI Clubsport Petrol 2020 2024 Volkswagen Golf MK8 2.0 TSI R 4motion Petrol 2020 2024

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supplied with replacement solenoid and has lower profile than T9351   The T9381 is the latest addition to the DV+ family, and offers all the benefits you’d expect from a DV+: Sharper throttle response Faster boost recovery after gearshift or brief throttle lift Improved boost holding Unrivalled longevity, backed by our Lifetime Warranty  The T9351 DV+ has been and remains the workhorse of the DV+ family. By replacing the problematic valve mechanism of the factory electronic diverter whilst re-using the solenoid, the T9351 works brilliantly, keeping the cost low and the benefits high. However, with the T9351 there is an increase in overall height of 11mm, which in some cases can cause clearance issues, for example: 2013.5+ Jetta GLI VW Golf MK8 GTi and R Any MQB platform with an aftermarket intake or IS38 turbo Audi 4.0 TFSI from 2012-2017 Here’s where the T9381 comes in. Featuring a low-profile integrated solenoid, the T9381 is shorter and more compact than even the factory diverter, ensuring it will fit the tightest applications. The T9381 can also be used instead of the T9351 when you’d prefer to replace the entire factory diverter valve rather than re-use the factory solenoid (e.g. if your solenoid is faulty).   Part Number: T9381Shipping Weight: 0.2000kg The T9381 is the latest addition to the DV+ family, and offers all the benefits you’d expect from a DV+: Sharper throttle response Faster boost recovery after gearshift or brief throttle lift Improved boost holding Unrivalled longevity, backed by our Lifetime Warranty  The T9351 DV+ has been and remains the workhorse of the DV+ family. By replacing the problematic valve mechanism of the factory electronic diverter whilst re-using the solenoid, the T9351 works brilliantly, keeping the cost low and the benefits high. However, with the T9351 there is an increase in overall height of 11mm, which in some cases can cause clearance issues, for example: 2013.5+ Jetta GLI Any MQB platform with an aftermarket intake or IS38 turbo Audi 4.0 TFSI from 2012-2017 Here’s where the T9381 comes in. Featuring a low-profile integrated solenoid, the T9381 is shorter and more compact than even the factory diverter, ensuring it will fit the tightest applications. The T9381 can also be used instead of the T9351 when you’d prefer to replace the entire factory diverter valve rather than re-use the factory solenoid (e.g. if your solenoid is faulty).       SHARPER THROTTLE RESPONSE FASTER BOOST RECOVERY ON GEARSHIFT SOLVES BOOST LEAKING ISSUES BUILT TO LAST European manufacturers are pushing their engines to the limit. Get a DV to match. GFB's DV+ diverter valve range offers a direct-fit performance solution for the weak factory diverter valves used on many modern vehicles. By retaining the factory ECU control and recirculating the vented air, the DV+ is a purely performance-orientated product. 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. Furthermore, these benefits won’t cost you the Earth! Rather than throwing the entire factory diverter valve system in the bin (like other manufacturer’s “solutions”), the DV+ keeps what works and replaces what doesn’t. It retains the factory solenoid and ECU control to ensure simple installation and reliable operation. 10% faster opening, 50% faster closing than the factory diverter Retains the factory solenoid for seamless integration Replaces plastic valve parts with metal for reliability and strength on stock or modified engines Direct-fit replacement with GFB’s TMS benefits Exclusive “pilot-actuated” valve mechanism for rapid response at high boost  

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