Reviewed By Colin B (Sioux City, IA) Reviewed for a 1999 Ford Ranger —1/19/2017 8:17 PM
I was happy with the product. It gave me extra torque and horse power. Even though I was hoping it would be more power, it was still a big difference.
Reviewed By anthony l (MARTINEZ, CA) Reviewed for a 2007 Hummer H2 —2/2/2017 11:27 AM
I like how much faster the F5 is compared to the F4 . It has better graphics than the F4 and is just a good product overall and it made my truck a lot better to drive with more power and better shifts. I have a cold air intake , cat back exhaust which makes this tuner work even better.