Not sure which 1999 Jeep Wrangler Power Programmers & Performance Tuners are right for you? We have over 5642 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 choose Hypertech because I also own one for my 2001 diesel truck and it works very well, this one for my jeep was a little harder to install, the program (required me to use my computer) but was no problem. There is a definite HP increase, I also put a new header and exhaust on which I recommend before increasing HP in any motor." —David N from Henderson, NV bought a Hypertech Max Energy Programmer for a 1999 Jeep Wrangler, 4.0L 6 cyl. engine.