GFB HYBRID TMS Dual Port 03-09 Subaru Legacy GT Exhaust- Mufflers & Tips>Exhaust Valve Controllers Dual Springs expand operating pressure

Dual Springs expand operating pressure range while maintaining a low profile and reduced weight

combine with the Derringer inline tuner for a total gain of 81 hp

5" diameter polished tip

CSF 06-15 Mazda MX-5 Miata 2

GFB HYBRID TMS Dual Port 03-09 Subaru Legacy GT Exhaust- Mufflers & Tips>Exhaust Valve Controllers Dual Springs expand operating pressureThe 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