Quote:
Originally Posted by XEautosport
Weren't all of them tested that way?
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Right, but the aFe and stock intakes pull air from the front bumper regardless of whether or not the hood is open. The Injen and AIRAID units pull more air from the engine bay. As the temps rise in the engine bay, the power these intakes put out decrease (the effect is rather quick, actually). By just leaving the hood open for all intakes, you're negating this advantage, which can produce unrealistic results.