GFB DVX Performance Diverter Valve T9659 for Select 2013-2020 Audi A3/S3 and VW GTI/Golf R

Fits select 2013-2020 Audi A3, S3 and Volkswagen GTI, Golf R.

The GFB DVX Performance Diverter Valve T9659 provides total control over your vehicle’s boost venting and acoustics. Engineered for late-model VAG engines where space constraints prevent the use of larger valves, the DVX incorporates GFB’s patented venting bias adjustment. This system allows you to infinitely vary the airflow between the recirculating outlet and the atmosphere outlet, giving you the choice between silent factory operation, a loud blow-off sound, or a specific blend of both.

Constructed to replace the often-unreliable factory electronic solenoid, the T9659 uses a heavy-duty piston design that remains closed under high boost while maintaining sharp throttle response. It integrates directly with the factory ECU control, ensuring the vehicle's computer maintains authority over valve operation without the risk of diaphragm failure or boost leaks.

• Manufacturer Part Number: T9659
• Patented venting bias adjustment for customizable blow-off sound levels
• Dual outlet design supports simultaneous recirculation and atmospheric venting
• CNC-machined housing designed for tight engine bay fitment
• Piston-driven mechanism for superior pressure handling compared to OE diaphragms
• Maintains ECU-controlled operation for seamless performance integration