A stand alone fuel management system controls the fuel delivery to your vehicle’s engine. Most of these systems are designed to increase the horsepower and torque that your engine can produce. Many companies make fuel management systems. One of these is Engine Management System, the makers of high performance engine fuel management systems. Another company is Simple Digital Systems. Perfect Power makes a variety of standalone fuel management systems for all types of cars. One of the best places online to shop for engine and fuel management systems for high performance requirements is the Summit Racing online catalog.