Go Fast Bits

DV+ diverter valves. Direct replacements for the factory diverter valve on many modern turbocharged cars. Many factory valves use plastic parts and a rubber diaphragm that can leak or tear as boost rises. The DV+ replaces them with a metal valve and a pilot valve mechanism, built to hold boost without leaking. DV+ valves recirculate, so they keep factory-like drivability and sound. Go

Blow off valves. GFB's venting, recirculating, and adjustable valves for owners who want a different sound or more control:

• Recirculating and venting valves for direct-fit and universal applications.
• Deceptor Pro II valves, which let you adjust from full venting to full recirculation from inside the car.
• Hybrid valves, which vent part of the air and recirculate the rest.

Shop Go Fast Bits DV and Blow Off Valves

Blow off valve accessories. Springs, adapters, flanges, and service parts for GFB valves. Go Fast Bits Blow Off Valve Accessories

Boost controllers. GFB electronic boost controllers, including the D-Force with EGT sensor input, and a boost gauge. Go Fast Bits Boost Controllers

External wastegates, springs, and actuators. GFB external wastegates, along with wastegate springs, actuators, and accessories for setting and servicing them. Go Fast Bits Wastegates, Go Fast Bits Actuators

Diverter valve, blow off valve, or hybrid?

A diverter valve (like the DV+) recirculates released boost back into the intake ahead of the turbo. It keeps air metering accurate, which matters on engines that use a MAF sensor.

A blow off valve that vents releases boost to the air with an audible sound. On MAF engines, it can cause a rich stumble or stall between shifts, because the ECU already counted that air.

A hybrid or adjustable valve splits the difference, venting some air and recirculating the rest, or letting you choose.

If you want factory-like behavior with better reliability, a DV+ is typically the right choice. If you want sound, choose a venting or adjustable valve that works with your engine management.

• Match the valve to your vehicle. DV+ valves are built to replace a specific factory valve. Confirm your make, model, year, and engine.
• Decide on sound versus drivability. DV+ valves recirculate. For a vent sound, choose a VTA or adjustable valve, and check whether your engine uses a MAF sensor.
• Size wastegates to the setup. Larger turbos, higher power, and low boost targets need more wastegate flow to prevent boost creep.
• Choose springs below your target boost. The wastegate spring sets base boost. A boost controller raises it from there.
• Plan for tuning. A direct-replacement DV+ typically needs no tune. Boost controllers, wastegate changes, and higher boost commonly require one.

Installation notes

• Install DV+ valves in the factory location using the supplied hardware and any required adapter.
• Check vacuum and electrical connections. Many factory diverter valves are electronically controlled, so reconnect the plug and confirm no fault codes appear.
• Mount BOVs close to the throttle body and route vacuum lines away from heat.
• Set up boost controllers carefully, following GFB's instructions, and verify boost with a gauge.
• Pressure-test the charge system after installing a valve, and check for leaks.

Common problems GFB parts address

Leaking or torn factory diverter valves, which cause low boost and inconsistent power at higher boost levels.

Slow boost recovery between shifts, which GFB's TMS-equipped valves are designed to improve.

Compressor surge or flutter when the throttle closes.

Boost creep on high-flow builds, which an external wastegate can control.