The T9481 is a performance blow-off valve solution for the late-model VW, Audi, SEAT and Skoda vehicles.

In summary, if you know your GFB valves, this is the same as the T9451 VTA but with an integrated solenoid valve for a lower stack height and greater engine bay clearance.

If you want sound with your performance (or performance with your sound!), GFB’s T9481 VTA delivers!

By combining atmosphere venting with the proven performance benefits of our ground-breaking DV+, the VTA delivers an aggressive blow-off sound, improved throttle response, as well as superior boost holding and reliability.

With its low-profile integrated solenoid and compact design, installing the T9481 is a breeze. Just swap out your factory diverter valve with the VTA, and you’re good to go.

Reliable Boost Holding
Despite some improvements in reliability by the latest generation of OEM diverter valves, the performance trade-offs remain. There is no escaping the fact that the moulded plastic valve mechanism of the OEM valve cannot reliably seal boost pressure. The VTA’s CNC-machined aluminium and brass valve components, combined with a Viton face seal ensure reliable boost holding even up to 50psi.

Sharper Throttle Response, Faster Boost Recovery
OEM 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. GFB’s patented “pilot actuation” system allows the VTA’s 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 means the VTA will last a lifetime. So does the warranty.

Why choose a VTA over a "BOV spacer"?
Whilst “BOV spacers” might offer a cheap way to get a blow-off sound, they fail to tackle the fundamental performance and reliability issues associated with the OEM diverter valve - all they do is redirect the vented air.

The VTA offers more than just sound. By replacing the OEM diverter valve you also get enhanced performance and reliability.

• 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

Audi

Seat

Skoda

Volkswagen

Download T9481 Fitting Instructions