aFe Scorcher HD Performance Chip 1999 Ford Diesel Trucks V8 - 7.3L ManualIncreased Power and Performance: SCORCHER HD performance chips deliver significant power gains by increasing turbo boost as well as optimizing fuel injection timing and pulse width. Unlike many other chips on the market that flash the ECM, our performance chips receive data from the ECM and alter signals appropriately. Increases Boost Pressure and Optimizes Fuel Injection Timing Plug in Performance Chip for Your Specific 7. 3L Box Code Calibrated for