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Have any of you ever done this? Does it affect anything for the worse?
I am lacking port area and doing some testing and have 6" installed right now and thought about adding a couple 4" to see if more port helps score, but didn't want to order more 6" if I don't need them.
It should help if done right. You'll need to add them as close as possible (touching) to the 6". That will effectively create a larger, braced port opening. Keep the lengths the same as the 6", as multiple lengths will probably add all kinds of turbulence.
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