Blitz G7
From Wiki
The BLITZ® Compressor System was designed to give maximum horsepower and torque without sacrificing reliability and drive-ability. BLITZ® Compressor units come complete - oil-filled and ready to install for trouble-free maintenance. All kits are designed to be highly responsive while maintaining fuel efficiency. This compressor unit is electronically controlled by an activation switch; it is OFF at idle and ON when you step on the throttle. Blitz's unique clutch-type system will give you good throttle response without sacrificing power. This is the most comprehensive forced-induction kit available for the Celica GT-S.