High grades of stainless steel will not rust, they will discolor from heat. Surely any welder who welds stainless will use the proper rods for the welds is so this also will not rust. Almost if not all metals will discolor under high heat, maybe C-276 steel would do it, but you could also buy a car for what the exhaust system would cost. Just shut the hood and don't sweat the small stuff like a little discoloring of the exhaust system. Andy Blackmon 3513 ************************************** See what's free at http://www.aol.com. [Non-text portions of this message have been removed] To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/