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Message: <blockquote data-quote="shiroitenshi" data-source="post: 2498589" data-attributes="member: 27518">lol, TB size increase is for issues with not enough flow at full throttle, I wonder how it helps in terms of getting more air into the engine, because NA sucks air, not like turbo that pushes/forces air in.that's why turbo's need big ones, because they push a lot more volume than a normal NA, depending on boost amount.For NA, stay conservative, go with regular sizing by most aftermarket. 62 to 64.5 is the norm, bigger, maybe if you run high rpms that need it, but in most cases, too big makes no difference... you just hit 100Kpa (manifold pressure) earlier without needing to go WOT. 100Kpa (atmospheric pressure) is usually the maximum manifold pressure you can get on NA (if using turbo boost gauge, the meter will read 0, atmospheric pressure) you might get the ram air effect if you drive fast enough, and pipe the intake to the front of the bumper, but in most cases, I don't think you'll ever see it much, unless your intake is exposed out the front of headlight/bumper.But if you buy bigger billet TB because billet TB's look cool, go for it... I do think they look cool as well. :P</blockquote>

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