Not sure which 2003 Ford Expedition Performance Chips & Programmers are right for you? We have over 7429 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"I was little unsure about this, but my friend has the earlier model and he likes and he is about to buy the latest version, so I did it. Man, it made some difference in terms of sound, unlimited supply of power, smoothness of gears shifting, I really like it. Gas mileage is better by about 2 miles per gal. I recommand this to others. By the way, I also have flowmaster and cold air intake installed, so you need to have all the right stuff to make it work right." —Jack W from Fremont, CA bought a Hypertech Max Energy Programmer for a 2003 Ford Expedition, 5.4L V8.