The jet programmer is fantastic.
When I first purchased my 1999 Ford Ranger after installing a cold air intake my top end speed was 72-75 mph. After programming, I notice a conciderable difference in the shifting and gas. What I found most impressive was how responsive my truck was even the top end speed was much better. I had it up to 95mph and I believe it could have climbed even higher (but I stopped there) I would like to give this product two thumbs up!