Nitrous Express All GM EFI Single Nozzle System (35-150 horse power) with 10 pounds Bottle is the top of the line EFI power booster on the market. From the highest flowing solenoids, to the patented Shark nozzle, this system screams nothing but quality. NX has a system for every EFI car in the world. Available in horsepower levels from 35-50-75 for most 4 and 6 cylinder cars, and up to 150 for 8,10, and 12 cylinder engines. This NX EFI Stage One system comes complete without a bottle, stainless bottle bracket, lightning solenoids, extra long stainless braided N2O line, and all necessary hardware to complete the installation.