Subaru is debuting the Legacy Spec B, which was a special edition for 2006, but will be a full-fledged model for '07. The new model gains a sixth forward ratio for the manual gearbox and an electronic throttle and torque management system that Subaru calls SI Drive. SI Drive has three settings: intelligent, sport, and sport sharp. Set to intelligent, the system retards the Spec B's power output and dulls throttle response in an attempt to eliminate the car's jumpy turbo characteristics and make it easier to drive in day-to-day traffic. Subaru claims that this mode will increase fuel economy by ten percent. Sport mode is the default setting, and sport sharp will heighten throttle reponse and make gearshifts more aggressive in cars equipped with an automatic transmission. SI Drive will also be fitted to all turbo Legacy GTs and Outback XTs.