| If the only quality differences are what zinnyc said here ([ http://twinturbo.net/nissan/300zx/forums/general/view/2360200/truth_.html ]) Then getting a replica of the original machined would give it better air flow than the untouched aftermarket one. Heat coatings have nothing to do with it. Don't be mad because you don't have one. Either way, my standpoint on this is correct. You just don't seem to like it.
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