The aFe SCORCHER HD performance chip for 1999 Ford 7.3L diesel trucks (automatic) is a plug-in module that adjusts boost and fuel injection timing to increase power. Installation requires access to the vehicle ECM port and no cutting or splicing; a cabin knob allows four on-the-fly power settings up to a HOT setting (marketed up to +140 HP). Fitment requires ECM DPC-402 and specific box codes listed by aFe.
aFe Scorcher HD Performance Chip 1999 Ford Diesel Trucks V8 - 7.3L Automatic