The BLITZ® Compressor System was designed to give maximum horsepower and torque without sacrificing reliability and drive-ability. All BLITZ® Compressor units come complete - oiled filled and ready to install for trouble-free maintenance. All kits are designed to be highly responsive while maintaining fuel efficiency. The Compressor unit is electronically controlled by an activation switch 3 different settings (Low, Med. and High) - allowing the car to respond to the individual's driving style.