my friend over torqued his tuner nut which is a hex-style lug and cannot take it off because it is stripped(lug nut, not key). Can anybody supply some help for him on taking it off a different way..??? thankyou

 

Some have luck letting a 1/2"drive impact gun run to speed. Sometimes it will catch enough threads one last time to come off (Sound quite French Canadian, don't I?)
Sometimes the nut can be split with a cold chisel. Either way, something ain't surviving!!!
What complicates matters is if that stripped lug nut is surrounded by a particularly nice alloy wheel.

P

 

happend to me,
I took it to the shop and they Arc weld another nut over it then use a impact gun.

Ujhonda