Ok so I purchased my hemi 2 1/2 weeks ago, since then it has been in the shop for 1 week while they replaced all 8 of my fuel injectors since the guy before me put bad fuel in it. Luckily the warranty covered it or I would have been hella pissed. Anyway, I had dual exhaust put on and K&N 77 series CAI and then a few days ago I noticed that whenever I am going about 50 MPH and I press on the gas pedal there is very little response until I press harder and switch gears. Kind of like a dead spot, or as the mechanic at dodge referred to as a "fall out". He said there wasn't anything wrong with it though and it was a result of my aftermarket exhaust and intake and that the computer has a re-learner program that will eventually take care of it. He told me the only way to get it to stop was to drive it more and the older it gets, the smarter it gets. Has anyone else heard of this? Aftermarket performance upgrades causing a dead spot or fall out in the throttle? Thanks guys.