GFB HYBRID TMS Dual Port 15+ Subaru WRX / Forester - T9207 83.5mm in turn sweeping the arm

in turn sweeping the arm forward slightly which relocates the knuckle and base of the front strut forward introducing additional positive caster (~0

and Pro-S II

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GFB HYBRID TMS Dual Port 15+ Subaru WRX / Forester - T9207 83.5mm in turn sweeping the armAll 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 the Hybrid is a dual outlet