GFB HYBRID TMS Dual Port 03-09 Subaru Legacy GT Exhaust- Mufflers & Tips>Exhaust Valve Controllers combine with the Derringer inline

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

The Heavy-Duty Bar & Plate Construction All-Aluminum Cast End Tanks have been Pressure Tested at 120 psi for Maximum Reliability in Extreme Boost Applications

which results in poor performance and driving feel

large 7" tall radial flow performance air filter with 5-layers of progressive finer mesh cotton media providing maximum airflow and performance

GFB HYBRID TMS Dual Port 03-09 Subaru Legacy GT Exhaust- Mufflers & Tips>Exhaust Valve Controllers combine with the Derringer inlineThe 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