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Message: <blockquote data-quote="SmokeyDog" data-source="post: 6349670" data-attributes="member: 614830">i look and look and i can find anyone know the are of a 4 inch round port ?and if you have a round port you want to have the same, more, or less port area?building a box with round ports 9.05 cubic feet after all displacement not includeing ports. thinking 6 4'' ports 12 3/4'' long, half in box half out.or8 4'' ports 17 3/4 long  depending on port area needsi  going to use pvc pipe if i can find bigger dim pipe ill get it but 4 is the biggest ive found. i figure ill flare them on both ends, note the extra 1/4inch for flare. or close to it.new box is being started tomorrow, i made a mock up of the box anf this one fits so i am good</blockquote>

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