You bought the kit right ? Did you also have to pick up a PERFORMANCE MASS AIRFLOW SENSOR with it ? I'm looking at one for my 99 Tahoe. They want $300 for the kit, and another $300 + for the sensor.I have a volant air intake in I cant say how much I love it! I dont know the actual HP gain from the minor upgrade; however, it feels like my truck has woken out of a coma. Seriously, when I stepped on the gas I could actuallly feel the difference. My gas milage went up about 1.5 MPG but now that it's faster I seem to be hauling a little bit more @$$ and wasting gas. Plus it adds a little bit of a meaner sound, which is fun to hear when you are mashing the gas.
GO VOLANT plus it looks cool as hell. I'll take a pic of mine later and send it to you.
I havent read this site but you could probably read about how they work (from a bias view obviously since it's thier site) and why it might be better.
P.S. Did I say that I loved mine yet?