720 WHP Acura RSX - Car Dissection
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For classes where the K20A breathes through individual throttle bodies, the large, off-center oval cutout serves as their inlet, with fiberglass ducting connecting the two. For 720whp "blown"-class competition (forced induction/race gasses), the fiberglass bumper's two triangular cut-outs near the hood flow air to the radiator, and the two smaller holes at the bottom of the bumper feed air to twin Rotrex superchargers. As for the larger hole between them, "This is used when the radiator is lowered to fit under the ITBs, in classes where they're used," says Doug. Come race day, vinyl tape covers whatever cut-outs aren't used, along with the seams between the bumper and the hood, headlights and fenders, to further reduce drag. View Related Article
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