About 2 weeks ago i put on a k&n cold air intake on my '05 gtp and i love the sound i love the sound i get now, but theres another sound I just started to get. It's a somewhat high pitch sound that i hear when i put my foot down. I only hear it though when i put enough throttle into it to just barely hear the supercharger, if i really get into it i won't hear it. I don't know if that's because the whine of the supercharger was just louder or what. I'm going to check for any possible intake leaks but i figured i'd post something up on here because maybe someone's had the same problem. Oh and my car also idles rough but its not everyday so i didn't know if maybe that was related to that sound. Any help or suggestions would be appreciated. Thanks