The aFe SCORCHER HD performance chip for 1999 Ford 7.3L diesel trucks (manual) is a plug-in calibration module that modifies boost and injection signals to enhance power and drivability. It installs into the ECM connector with no wiring modifications and offers four selectable power levels, including a HOT mode marketed up to +140 HP. This unit is matched to specific ECM box codes noted by aFe for proper application.
aFe Scorcher HD Performance Chip 1999 Ford Diesel Trucks V8 - 7.3L Manual