So the 3.0 has been out for a couple of years now. I just bought a 21 AT4 with the 3.0 duramax. I'm wondering if any of you have found any mods to do to make a bit more power WITHOUT voiding warranty? Dont get me wrong, I'm very impressed with the little i6 duramax! But, being a guy who is always looking for ways to improve things, I was curious as to what anyone has found out! Normally I wouldn't ask for things like this but I havent had the balls to tear into it myself!