For serious race applications, the ZEX Race EFI Nitrous System is the best choice. Featuring Fuel Shear Technology, enrichment fuel is injected directly into the center of the nitrous plume, yielding total and even fuel atomization. Tunable from 100-250 horsepower, the race kit features other important ZEX features such as Active Fuel Control to adjust fuel enrichment with fluctuations in bottle pressure and the patented ZEX electronic TPS switch for nitrous activation at wide open throttle.