I'm running a snow performance water/meth injection kit. It takes 93 and turns it into 110 or better. They were about $259 I think they are more like $300 now. Pretty easy install. Here's the dyno sheet from a 426 Hemi.
my set-up http://www.youtube.com/watch?v=JYw2q7igDGs

[IMG]http://i66.tinypic.com/pui5j.jpg[/IMG]
Coming soon!!!!