In Russia we also have at least 3 Rotrex-based S/C kits installed with more available for sale (around $6k/kit),
http://www.youtube.com/watch?v=_vSCOZOk1cg
These, accoring to owners who switched from Alpine, are giving a much better performance increase.. they claim 6seconds to 100km/hr acceleration:
http://forum.4x4club.ru/index.php?ac...=post&id=57875
We also have one Kenne Bell s/c installed
http://forum.4x4club.ru/index.php?s=...dpost&p=636086
Nikita - you should visit Russian VX site, vast knowledge base there, including on superchargers