Below are links to web sites with conversion info, in case you wanted to convert your present gasoline-powered engine into a Compressed Natural Gas-powered engine.

CNG Conversion Kits

CNG NOW! conversions

About.com alternative fuels and hybrid cars

CNG Conversion Install

CNG Natural Conversions

And here are some local conversion installation and sales companies:

Afton Tire Factory,  201 N Washington-US Hwy 89  Afton,  WY  83110  |  Ph:  307-886-3244

Star Valley Auto Sales,  101352 US Hwy 89 Thayne, WY 83127  |  307-883-7400