Nitrous Express 20923-12 35-75 HP Sport Compact EFI Single Nozzle System with 12 lbs. Composite Bottle Top of the line EFI power booster on the market Screams nothing but quality 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 Complete without a bottle, stainless bottle bracket, Lightning solenoids, extra long stainless braided N2O line and all necessary hardware to complete the installation