The only thing I can really add here is if you were looking for fuel economy by going to a smaller truck, then the supercharged version is not the way to go. I bought a 2003 se/sc six months ago and did the lift, tires, intake and exhaust. My before and after MPG's are drastically different, but it was only getting about 15 or so highway miles per gallon. (now WAY less!) Maybe there is something wrong with my X, i.e. the tires (33"), because my roomate has a '04 Titan with a lift and tires and we get the same mileage, but like I said, if you were looking to save money on gas, don't supercharge it. Don't get me wrong, I love my Xterra and I'm constantly looking for ways to challenge it and so far, it has not let me down.