Nitrous Express Nitrous Systems 61025-2.5P Direct-port style system for carbureted single cylinder engine. Includes our exclusive "PROTON" solenoid assembly,braided stainless hoses,Piranha nozzle,fuel pump, relay,microswitch, arming switch, jetting for 10,15,20 or25HP comes with a 2.5lb bottle and bottle bracket. SINGLE CYLINDER "PROTON" SYSTEM W 2.5 LB BOTTLE, 2.5LB N2OSys
