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I don't know if you're being serious and I have no idea what a flow test involves. I have an engine that I spent way too much money on, and when I asked the mechanic if he was going to polish the ports till they were mirror-like he said, "not quite that shiny, you want a little swirl as the mixture flows" or something like that. This is the theory behind the various rip-off devices you used to be able to put in your intake somewhere to "boost milage by XX %". 10 percent seems significant to me, wouldn't it increase milage a bit?
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