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			if there is a pebble caught somewhere you should easily be able to see score marks on the rotating part.  If you don't see anything on the outer or inner brake rotor surface, it may be all the way on the inside surface of the strut carrier adjacent to the outer CV joint
		 
		
		
		
		
		
		
			
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				07 Porsche Cayman S speed yellow 
87 Porsche 924S Carrera GT project/ 951 engine transplant 
2015 BMW X5
			 
		
		
		
		
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