Along with the required, Mustang specific parts, the ZEX™ system also features the most technically advanced performance features of any system on the market. The ZEX™ system uses patented “Active Fuel Control” that automatically adjusts nitrous fuel enrichment with bottle pressure; the engine never runs too rich or too lean. Our system also features a patented electronic TPS switch for perfect system activation at wide open throttle. Power settings are fully adjustable from 75-175 horsepower with the included tuning jets.