Hi, thanks to everyone that's helped me out so far much appreciated.  
I want to keep the noise as low as possible on my car  - is a 2 1/2" system with a straight through back box much noisier than the std. system?. 
 
Which back box do you recommend using or do you make up your own ?
		 
		
		
		
		
		
		
		
		
	
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