You're going to get a bunch of smart a** answers on this question along with some scarcasm. But let me tell you straight up. Yes, your car will benefit greatly from having N2 in the tire rather than air. In fact, what you really need to do is make sure it's Dry Nitrogen and the normal compressed Nitrogen has a hign moisture content and moisture causes expansion as it heats up. This expansion causes the tire to get bigger and therefore heavier (larger dia of the rotating mass). the weight combined with the subtle change in overall gear ratio makes your car slower. If you suse dry nitrogen then you'll be able to run a smaller tire, but inflate it to the diameter you choose as it won't change as much with the heat build up with driving. That way you can optimize what you intend to do on that drive. for example, if you want to cruse and get great milage then inflate the tires to just below the popping point. that will give you the biggest diameter and much less rolling resistance. it your going to drag race, inflate the rears less for the wrinkle wall effect of slicks. Man I know you'll hook up then. You might want to get some HD halfshafts. Sorry I already sold mine elsewhere. If you're going canyon carving...then leave them just a little over 1/2 full to make sure you get the entire tread block down. Of inflate just one side if you are planning offramp racing. That is one of the things I personnally enjoy as you can't get a ticket on an on/off ramp. Well, at least where I live. Af few other things to consider is to keep your windbreaker zipped up to reduce drag oh and wax the hood and top of the roof (if you have a GTS) to reduce friction. You don't want to wax the back and it spoils the downforce if the air flows over it to smooth. You need a bit of roughness to break the airflow. that's why dodge designed the rears like they did ot get some minor exhaust dust on the back end. These are all absolute facts I've learned from all my track experience so listen to me, I know what I'm talking about.....however, YMMV...good luck.