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Benefits in enlarging intake port???

Engine

Vehicle Information: Year: 1987; Engine (Size, Modifications): 3.3; Total Mileage: 95000;

I'm rebuilding the top end of my 87 930 and am wondering if there's any benefits in enlarging the intake port?Many tuners/performance shops are suggesting to opening it up to 36/38mm; particularly if using a K27 (as I do).Would like to find out if there's real benefit & any downside in doing that.Thanks...

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