Nitrous Express Sub-C Nitrous System (25-50 horse power), Less Bottle can get 4 cylinder gas mileage and V8 power with the new Sub-Compact nitrous system. Designed specifically for small cubic inch engines, with lower horsepower settings, and lower cost. The Sub-Compact system comes complete with wide open throttle switch, stainless bottle bracket, stainless steel based solenoids, extra long stainless braided N2O line, and all necessary hardware to complete the installation. Gas prices got you down? Giving up your beast for a sub compact? ease the pain of going GREEN.