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Message: <blockquote data-quote="Buck" data-source="post: 8152901" data-attributes="member: 591582"><p>There are calculations you can do, to find exactly how close is to close.  You have to figure out the surface area left in between the back wall and around the flare, so it'd be finding circumference of the inner flare then multiplying it by the distance between the back wall.  If that surface area is smaller or equal to the surface area in your port, then it can do something like make your port length longer (as in affecting tuning).  I just don't like to push aero's like that.  I like full diameter from back wall.</p></blockquote><p></p>

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