Well, I installed the v-force on my truck. At first I was disappointed. However, I was at sea level when I tested it. Now, the response of the line is amazing, and top end is much stronger. I noticed the power increase extends to about 5200 rpms, where as before it was around 4800rpms. I'm going to check stat with a G-tech pro and see truly if increased my HP. It shouldn't be to hard to test being that it has an override switch.