Hopefully its an uber titanium bolt in there.
side note, that forum has a “welding porn” thread thats massive long, and there are some seriously cool work in there.
edit: http://www.race-dezert.com/forum/showthread.php/59124-****Pretty-Welds…****?highlight=welding+porn
90+ pages. might take a few hours to get through it! but its worth it!!!