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					Originally Posted by Paul Singleton  These mufflers are a multi-fit type and in the catalogue, depending on the application it would specify A or B for the inlet. In other words it doesn’t matter, the muffler is non- directional. Whichever way it fits best, put it on. 
 Paul
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 Thanks, and that makes sense. Looking inside it appears to be identical baffle tubes going the length of the muffler. I doubt there's more to it than that.