Nitrous Express Nitrous Systems 62028P Direct-port system for carbureted four cylinder engine. Includes our exclusive "MAINLINE" solenoids, braided stainless hoses, "Piranha" nozzles, fuel pump, relay, microswitch, arming switch, jetting for 40,60,80,100HP. 2.5 lb Bottle and bracket. FOUR CYLINDER "MAINLINE" SYSTEM, 2.5LB FOUR CYLINDER "MAINL