80mm. and the heat soak will be an eternal debate. this will be the third time i've used an aluminum ls style intake. the speed in which the air flows through the intake makes it inconsequential. i've iced down my plastic ls1 intake and only gained about a tenth in the 1/4 mile.
there is a huge heat difference to the touch. maybe i'll get my temp gun out and take some readings to compare.
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the alignment guy
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