Not really nothing you can feel. Though you have a second gen and your in luck. Get a tuner i.e bullydog superchips etc etc and removed the wot restriction. 05 plus have throttle restriction under 40 mph. Being around the same price as a cold air intake the tuner is going to get you the biggest gain plus no more stupid restriction to power and you can put a tune on it and make some more power. Doing this plus getting maybe a k&n drop in will make quite a noticable gain.