Here are a couple of popular ones: http://www.mustangdyne.com/ http://www.dynojet.com/ Good luck with your shop! Justin parted 92 - need something? >>> <clubairth@bellsouth.net> 1/16/2006 1:40:39 pm >>> I remember someone on the this list used to own a dyno shop? maybe Don? I am looking into this and would love to talk to someone who was in the business!! Thanks!