You can get the ZabTeck CAI if you care to put a hole on the inside of your engine compartment. Otherwise I suggest an AEM CAI that uses no oil or an AirAid CAI that uses a minimal amount of oil. I was told a few yrs. ago by a Ford electrical tech. that the oil from the aftermarket filter bleeds through on to the MAFS.
As far as exhaust I went with a Flowmaster 70 Big Block single-in / duel-out because I was looking for the quietest one on the market. I think that a lot of people here have gone with the Flowmaster 50 SUV or Magnaflow; it all depends on what sound you are looking for.
The best boost in gas milage for me, along with the above, has been the XCal2 tuner. One of our site sponsors will be more than happy to help your. FastPartsNetwork.com or BamaChips.com