
Go Fast Bits DV+ Diverter Valve Upgrade – T9356
Worldwide Patent & Design Patent Pending
- Retains factory solenoid coil for quick ECU response
- Upgrades weak plastic components with billet aluminum and brass internals
- Direct-fit installation with GFB TMS performance benefits
- Exclusive "pilot-actuated" valve mechanism for ultra-fast response under high boost
The GFB DV+ is designed to fix the weaknesses of the factory diverter valve found in many BMW, Fiat, Abarth, and Alfa Romeo turbocharged vehicles. While the OE solenoid performs well, the internal valve often leaks or fails under high boost. GFB replaces the internal plastic parts with durable anodized billet aluminum housing and a precision brass piston.
Benefits include improved throttle response, faster actuation, better boost-holding capability, and no compressor surge or flutter. Installation is simple, with no need to rewire or run vacuum lines like other aftermarket diverters.

Unlike other diverter valve kits that replace the entire system with slower pneumatic setups, the DV+ keeps what works and upgrades what doesn’t, delivering a high-performance solution that’s faster, easier to install, and more reliable long-term.

Most modern Euro cars use solenoid-controlled diverter valves. While fast, they suffer from weaknesses in both diaphragm-type and plastic piston-type versions.
![]() Issue 1: Diaphragm ruptures easily under chip tuning and higher boost. |
![]() Issue 2: OE plastic pistons leak by design and often fail to close properly after high-boost shifts. |
With a pilot-actuated brass piston system, the DV+ maintains high-speed operation while opening only as much as necessary, improving both performance and longevity compared to the factory valve.

Compatible Vehicles:
BMW: 1 Series (E82, E88, F20, F21), 2 Series (F22), 3 Series (E90–F31), 4 Series (F32), 5 Series (F10, F11, F07), 6 Series (F06, F12, F13), 7 Series (F01–F04), X3 (F25), X5 (E70, F15), X6 (E71–E72)
FIAT: 500 Series 1.4L Turbo (135hp–180hp), 500C/595C Convertible
ABARTH: 500/595/695 1.4L US Models, 124 Spider 1.4L Turbo
PUNTO: 199 1.4 Turbo (155–180hp)
ALFA ROMEO: Giulietta 940 1.4 TB (120hp–170hp)
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T9356
Manufacturer: Go Fast Bits (GFB)
Warranty: 1-Year Manufacturer Warranty