All the Performance with the Noise!
The Hybrid valve is back! In 1999, GFB’s first Hybrid valve pioneered the dual port design, which was so successful the technology has since been adopted by most other brands. By “staging” the two venting outlets, at low valve lifts most of the air is recirculated. As the car is driven harder, the valve opens further and more of the atmosphere venting port is exposed for a louder sound.

As a benefit, this system makes it possible to use these valves on cars with sensitive airflow meters that often suffer issues such as backfiring and/or stalling, whilst still achieving the signature blow-off sound.

Dual staged venting outlets, can be configured for full recirc, 50/50, or full atmosphere operation using plugs provided
TMS Technology for up to 30% faster boost recovery on gearshift
Huge range of direct bolt-on kits
100psi+ boost holding ability
Manufactured in Australia in accordance with ISO 9001