Reviewed By Richard H (Hammond, WI) Reviewed for a 2008 Chevy Impala —3/15/2011 3:57 AM
Definitely made my car perform much greater. Love the added power and firmer shiftpoints. Can't go wrong with this one.
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.