i have a vid of my fresh 440 in the project section with hedmans and 2.5" summit exhaust - idle is basically stock - power is greatly improved over the stock low-comp set-up, throttle response is way better, revs about the same, but can definitely hear and feel the increase over stock - i could have went another step up probably, but with an auto, i didn't want to get into changing the converter, but i'm happy with it