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					Originally Posted by  Low Impedance
					 
				 
				does anyone actually produce such an item? I mean i have ideas how i would make something work for a naturally aspirated engine but i lack some of the tools needed to make one. 
			
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 well, the honda kids source their itbs from motorcycles.  I know the R1 has variable length runners, but i'm not sure how much.
This video of the 787b shows the runners operating @ about 4:50