Reviewed By Robert B (Corpus Christi, TX) Reviewed for a 1995 GMC Jimmy —7/23/2006 8:36 AM
The performance improvement is great. I had a cat back exhaust system that actually hurt performance due to the intake restriction. The FIPK made a noticeable difference especially with cruise control on. Now it doesn't down-shift automatically on small up-hills. Low end response is much better. I don't run it hard, but when it gets to 3500 rpm it has a little kick now. Not sure about milage improvement, but since it runs smoother and easier, it probably helped. Now I need one for my 95 Bronco 5.8.