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 I would not get it done at a muffler shop they use a light weld and is prone to breaking I would go to a driveline shop and have it done.  as for labor I dont know around here they charge 80-100 an hour 
				__________________RUN IT STAIGHT AND RUN IT HARD
 
 
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 Novi 2000
 60'   1.46
 1/4  10.67
 mph  126.5
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