Take control of your engine management system with our stand alone Digital Injection System. Developed by Western Motorsports and Simple Digital Systems to replace the Ford EEC computer. Our DFI allows you to program all parameters for fuel injection and ignition to tune for maximum performance from your engine. The WMS / SDS is available as a plug in system for the Ford EEC IV modular engines including 4.6 and 5.4 in SOHC or DOHC