Performance Tune 2009 Challenger R/T - help!

[TorRed R/T]

180 t-stat, predator u7135 and CAI= a whole different car!  I thought the perfomance tune did wonders for the Mustang, but this is IMPRESSIVE!

Now go out and put a few miles on it at about 1500-2k that seems the wake up point and they start to work better  , which tune did you use and which CAI ?

[FORDMOPAR70]

Predator w/ 93 CAI tune, 180 t-stat, LS fan 189 degrees med and high 194 degrees, firm shift, mds off.

k&n CAI kit.

Have someone working on a custom tune SCT - template about 5 weeks out. will go with C&L CAI and Magnaflow tru-x cat back exhaust.  On the mustangs C&L outperforms K&N but could not get ahold of a C&L this moment and I'm rather impatient  .

What is the deal with the ginormous resonator?  It even looks like it would kill horsepower.