I agree that the ram air effect is minimal on the '65 through '67 gtos. The real difference is in the air temperature that makes for a denser charge. By and large, under-hood air is quite a bit hotter than outside the hood air. The larger the difference between the two, the greater the difference in performance with the ram air pan. I am proud to run one of the estimated 300 original ram air pans on my '66. I don't know how great of a performance difference it makes, but it is a part of history. It looks cool too! Jerry.
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By diligent effort I seem to be prolonging my adolescence to total absurdity. John D. MacDonald
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