Am seeing quite high IAT on mine (over 120F on 80F day) but then the "hose" has gotten quite complicated over what Allpar showed for the 2011:
2011 Intake from pentastrs web site.
In counterpoint, my 2012 seems to have acquired several "chambers" right in hot air areas.
Will begin by using a plain 3" tube from air cleaner to throttle body without the furnaces and will see if any difference. For stage 2 I may wrap the tube with exhaust tape.
My opinion is that 3" may be overkill for a 222 cid 6 but the TB is 74 mm ( 2.9") so will use that & monitor IMAP.
Do think the stock air cleaner and snorkle is adequate (same used for Hemi) so will see what just replacing the hose does.
Will mention that just replacing parts without recording IMAP and IAT values before and after will not tell you much.