I'm going the IPF route as I have a 2LT with all the bells and whistles ....
Add to the fact that I have the SS Brembo's & soon to be the 1LE suspension I'm too far to turn around now. lol
It's up to you. If you have no mods and want a higher trim package then trade up.
If you love your ride and just want some more HP...start moding.