When used under wide open throttle, factory computerized sensing devices go into an open-loop mode, by-passing most computer controls. Kit #741-05123 is adjustable from 75-125HP and includes a 10lb. bottle, solenoids, lines, hardware and instructions. System #741-05122 is designed for a variety of engines and applications and is adjustable for 40-60 horsepower. Bottles are shipped empty.