The 22711 Performance Tuning Chip fits the Ford Excursion 7.3L Powerstroke engines 2002 thru 2003 with an automatic transmission. This performance tuning chip is designed for fuel economy with up to 1-2 mpg, and an increase in horsepower up to 140HP. Adjustable with a dyno proven six position switch, you can adjust the power on the fly, 50HP with built in high idle, 75HP, 100HP and up to 140HP. The Performance chip provides optimal tuning with better fuel injection timing and pulsewidth, increased turbo boost pressure, and enhanced shift points and firmness. Plug-and-play connectivity means there’s no need to cut, splice or modify engine wiring.