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Originally Posted by sleestack
Restriction varies with mod level. Guys with fewer mods that affect VE are less affected by the restriction a smaller housing. So, for a guy with a stock motor with basic upgrades a .49 housing might be nice. By the time you add heavy cams, port the head, install a sheet metal intake many, etc. even a .63 A/R housing might be out of the question.
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Is ^^ talking about selecting a turbo instead of increasing flow with a smaller a/r housing?
If you could get into exhaust theory that would be great. No emissions testing here in FL.
