Streeterra,

there are no chips that you can buy outright for the X. The chips are soldered in place. You can however, send your computer in to have it modified (meaning the whole thing). This is usually a day turn around for this to happen. I'm sure there are lots of places, but I know JET does it and you can get the kit at Truck Performance.com Actually there a quite a few things you can get from there. But I'd shop around a bit, and a tweaked computer is probably one of the last things you may want to do, after you get all your other mods done. Hope this helps...Mike