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Message: <blockquote data-quote="mgaidica" data-source="post: 215591" data-attributes="member: 546572"><a href="http://gallery.caraudio.com/pp/showphoto.php?photo=1094" target="_blank">http://gallery.caraudio.com/pp/showphoto.php?photo=1094</a>look at it then read this...alright, the box is 4 cu ft with a removable round port (top port). The bottom two port holes are covered for now. For competitions you make a simple box, just an air box. You use like straight or right angle pvc all air tight to connect the two bottom ports to the "air space" box, and now switch out the top port to the correct length for lets say a now 6 cu ft box. This would be because you dont want to uninstall a nice box, but you want to compete with more air space. Just poped in my head, tell me what ya think...</blockquote>

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