View single post by Greg Fletcher
 Posted: 10-17-2013 05:17 pm
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Greg Fletcher



Joined: 03-11-2005
Location: Lake Nacimiento, California USA
Posts: 430
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 Contrary what many owners would like to believe and indeed what one might assume, dyno tests have shown that the factory air box will actually increase airflow and HP slightly over the K&N air filters on the JH.