Ok so I live in Tucson az and am trying to find places that fill nitrous. The only place that I know of for sure is pep boys on speedway but they want 4.99lb. Also their always out. If there is anyone else out there that knows of other places that fill nitrous please let me know.
Thanks,
Matt

 

Holley has a finder you can try:
http://www.holley.com/dealers/NOSDealerLocator.asp

 

Call Don's Hot Rod Shop on Stone Av.
They'll know..........

 

Pretty sure Don's does it. Also, they fill at SIR during race events.