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			As far as I know the S4 & S5 houings are interchangable.  I have two laying around if you're interested, one of them has a waterpump with 1,207 miles on it and is painted black - the whole housing. 
 
I think making one would be more time than it's worth.  By the time you cut up the flanges, get the needed pipine, miter cuts, welding etc etc etc....
		 
		
		
		
		
		
		
		
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