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			I do not know anyone who has tried to weld on a 2003/4 bolt on tip to a 1999 muffler.  2.5 owners who want the dual tips use a 2000-2002 S muffler with the sport exhaust adapter bracket.  
 
A 2004 muffler will fit a 1999 if you use the 2.5 liter adapter bracket from the factory sport exhaust.  This had been done on a few cars.
		 
		
		
		
		
		
		
		
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