The cai is a waste of money, do the gotts mod for $15 for dyno proven gains and get your gryphon custom tuned for it.

 

Reaction was just due to no filter.

Gotts mod on my 4.6 made a huge difference. I'd been so disappointed that my truck being a V8 had horrible reaction time from the moment I stepped in the gas to the time I actually felt acceleration. It is simple not complicated and only other thing would be a K&N drop in filter. It's worth it just for the smile factor that you get when you get what you ask for from the gas pedal.