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			to reduce intake noise at high revs ie on the highway, and it works brilliantly as at the moment i only have the fronts installed but i could hear them clearly at 100km/h and the stereo was only on 14 and it goes to 35
		 
		
		
		
		
		
		
			
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my complete sbug rebuild
if you dont believe that something so broken can be fixed have a look at the link above
			  
		
		
		
		
		
	
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