www.xmodsrc.com - The official XMODS site.

www.undergroundxmods.com/catalog/  - A great site with Some really amazing mods. A great spot to buy parts for your XMODS

http://www.xmodsource.com/ - Has a very helpful forum and lots of experience there

http://www.atomicmods.com/ - an unbelivible site. These guy REALLY know what they are doing... If you XMOD is messed go to this site and by the time your done you will know exactly what's wrong. They also have an awsome forum and a shop cam!