RE: Dont worry about all Mustangs...
Shaky
Depending on who you ask, and the brand. The CAI will net you 20-30 HP. The exhaust will give you added power, but with the OE cats you will only see 20+ HP. The exhaust will set you up for later mods, such as the 90MM TB. It also gives you more power down low, or at launch.
You dont starve a fatman (6.1L Hemi), so if he can take it the gas is on me! :-Þ
6.1L = 370 CI