The T9381 DV+ is a complete replacement diverter valve in a super compact design. The T9381 is shorter and more compact than the factory diverter, ensuring it will fit the tightest applications.

The original DV+ (T9351) has an increased overall height of 11mm, which in some cases can cause clearance issues, such as with the vehicles below:

• 2013.5+ Jetta GLI
• Any MQB platform with an aftermarket intake or IS38 turbo
• Audi 4.0 TFSI from 2012-2017

The DV+w/Pierburg Valve allows for more clearance, especially on vehicles running aftermarket intakes or turbo inlets. It also makes the installation easier on Gen 3 non-MQB vehicles such as the 13.5+ Jetta & Beetle, where the diverter valve is difficult to reach.

The DV+ Story: Better Performance – More Reliable

Many late-model European cars use ECU-controlled solenoid-type diverter valves. This is a good concept because the valve can react quickly and only opens when needed.

However, there are some problems with these valves. There are typically two types of solenoid-actuated diverter valves found standard on VAG and European cars, both of which have shortcomings.

Common OE Problem #1
The diaphragm types are commonly known to rupture significantly when boost and temperature are increased due to chip tuning.

Common OE Problem #2
The plastic piston-type leaks far more than most people realize (by design, not from wear) and doesn't always close after a high-boost gear shift.

Additionally, in both cases, the solenoid on the OE diverter is directly connected to the valve mechanism, which is not ideal because neither it nor the return spring is strong enough to open and close the valve reliably at a high boost.

With problems like this, you can see why other aftermarket manufacturers assume the best solution is to replace the factory diverter entirely. Unfortunately, although their replacement kits might be stronger than the factory diverter, their slower response speed and lower flow do not justify the extra cost and complexity – more of a compromise than a solution.

GFB has taken a different approach to deliver a complete solution that solves existing problems and improves performance without compromise or a hefty price tag.

The DV+ addresses factory valve problems with a straightforward and elegant solution. Keeping the factory solenoid retains all the benefits of the stock system and replacing the valve parts with indestructible metal components ensures strength and reliability no matter how much boost you run.

That’s not all. Rather than using the solenoid to actuate the valve directly, we've introduced a unique? Pilot-actuation? System. This means the solenoid controls the air pressure to open and close the piston, so it doesn’t matter how much boost you push through it; the DV+ will open and close reliably without exceeding the solenoid's capability.

This feature also improves on the factory system by opening the valve progressively in response to boost pressure, so it only opens as much as required to get the job done (the factory valve opens and shuts, it cannot partially open if boost pressure is low), resulting in better throttle response.