In absolute perfect conditions im sure.

 

Those aren't rwhp numbers and I'm sure they're way up in rpms too.

 

K&N Stock 05 F150 5.4 4x4 2nd gear run 13008 miles 3829 rpm done at K&N engineering Inc. I got these #'s off their web site
It did'nt say what rpm the airaid was at but showed pic in truck

 

I now have my Banks powerpack installed , everything fit perfect looks and sounds great! really woke my truck up even on economy mode! I did do a little clean up on some of the welds around the header flanges now they look awsome! 5/8 thick flanges wow.

 

The calculater has different tables for forced induction ovbiously.

 

My K&N allows 462cfm, but that's more than enough for my truck. I won't do much with all that air until I get headers, cat back system, custom X pipe, two 40 series Flowmasters, TB spacer, headers, upgraded spark plugs, and a better tune.