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Message: <blockquote data-quote="Dozy_production" data-source="post: 2306638" data-attributes="member: 561645">Excuse my french but im a little distraught after watching a good hour on anti scientologist docuementaries.So i have searched and use a couple of the calculators determining the relation to aero port length to its diameter. So the smaller the diameter the shorter the length is needed to achieve the same tuning? So what is up with people recommending a 4 or 6" diameter for one 12" when a 4" aero port (according to these calculators) can be used with the length of roughly 7.5 inches. i mean a 6" would mean the port to be 17 inches!I want to get a 2.5 ft^3 tuned to 38 with a 12" hd3. Fyi.</blockquote>

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