Here's some random CAI stuff I've been thinking about:
According to FRPP, an OEM throttle body flows 913 CFM. The consensus that the stock TB is more than adequate for a mostly stock Coyote.
The stock intake flows 748 CFM with a paper filter, so only a 135 CFM difference.
Paper filter flows 319 CFM; K&N panel filter 441 CFM = 122 increase.
Isn't the duct behind the grille the bottleneck of the system? Almost all aftermarket CAIs use this scoop, so if it's the least flowing piece then a larger filter and tube afterwards isn't going to help.
'14 Grabber Blue
GT - Base 300A, Track Pack, Recaro seats - Mods: SCT X4, BBK long tubes and X-pipe, Roush axlebacks, MGW shifter, BMR LCAs and UCA w/ mount
'93 Reef Blue
LX 5.0 - 5-speed, black interior, factory A/C delete - GT40P Top End, 5-Lug/4-Wheel Disc - SOLD