Profile: MadJack Diesel Performance Inc. specializes in providing light trucks and fuel filters. Our products include transmission components, brakes, cooling system parts, differential covers, engine exhaust, fuel system parts, gauges, digital monitors and air intake systems. Our fuel system mounts to the frame rail using the supplied sandwich plate mounting system. The suction line connects to the factory suction fitting on top of the fuel module. The pressure side connects to the factory injection pump feed line on the frame back by the fuel cooler. These pumps are internally regulated and do not require a return line.