K&N Cold Air Intake/Fuel Inj Performance Kit

[avrancart]

I am considering buying the chrome Typhoon cold air intake system #69-3520TP or the black plastic fuel injection performance system FIPK for my 2004. K&N tech dept. claims the black plastic runs cooler and has a dyno 15HP increase, the Typhoon has not been rated but is less.
I have several questions such as 1. Real HP gain 2. Noise level 3. Warranty issues 4. Ease of installation
Any recommendations? Which one would you buy, if any?
I currently just have a K&N filter installed.