GFB T9659 Diverter Valve 2.0TFSI EA888.3

GFB DVX – performance diverter valve with adjustable blow-off sound

The GFB DVX takes the immensely popular DV+ Diverter Valve and adds dual venting outlets, as well as the patented Venting Bias Adjustment system. This means you not only get better boost holding and better throttle response, but also full control over the volume of the blow-off sound.

What makes the DVX different from all other valves that just "whistle"?

The DVX is not just a noisy accessory like typical BOV spacers. By changing the way the valve operates, it offers the same performance benefits as the DV+, namely:

• improved boost pressure retention
• faster response
• better throttle response
• higher reliability

The system retains ECU control, ensuring the fastest possible response. No other blow-off valve offers the advantage of GFB Venting Bias Adjustment, which allows you to adjust the sound simply by moving the adjustment lever.

Durability and Real Functionality

The DV+ design solves the well-known problems of the factory diverter valve:

• boost leaks
• limited durability
• compromised performance in tuned cars

Furthermore, GFB uses pilot actuation to ensure better performance in both standard and modified engines.

Most importantly, all this does not cost excessively. Instead of discarding the entire factory system, as many other solutions do, the DVX retains what works and replaces only what is the weak point.

Compatibility

T9659 is a direct factory replacement with dual venting for:

• VW MK7 Golf R
• Audi S3 8V

Why not just a BOV spacer?

There are many BOV spacers on the market that make noise, but:

• they simply redirect air into the atmosphere
• retain all the weaknesses of the factory valve
• restrict flow through small openings
• do not actually improve system performance

The DVX offers real performance benefits, not just sound.

ECU Control vs. Vacuum Control

Many other blow-off valve systems remove ECU control and operate only on vacuum. This is not necessarily bad, but ECU control is significantly faster because it can:

• react to much smaller throttle changes
• control the valve more precisely
• maintain better vehicle behavior

Since factory ECU control is available, GFB utilizes it as effectively as possible instead of disabling it.

What's special about Venting Bias Adjustment?

GFB's patented Venting Bias Adjustment System is unique. Through an internal rotating sleeve, you can infinitely adjust the ratio between recirc and atmosphere venting.

This means you are not limited to:

• a fixed 50/50
• or 100% atmospheric discharge

You can set it exactly as you want – from almost factory-quiet behavior to a very loud blow-off sound.

An additional advantage is that the atmospheric outlet is one large port, not a series of small holes, as with spacers. This makes the sound:

• deeper
• louder
• fuller

Key advantages:

• Real performance improvement
• Better boost holding
• Faster valve response
• Retains ECU control
• Adjustable blow-off sound
• Deeper and louder sound than spacer solutions
• Higher reliability than OEM diverter valve
• Direct bolt-on installation

In short:
The GFB DVX offers true performance enhancement, better boost holding, and fully adjustable blow-off sound – from almost factory-quiet to extremely aggressive. This makes it one of the most sensible solutions for enthusiasts who want both sound and real functionality.