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335i Ram Air Intake Kit
RPi's Ram Air Scoops converts your factory intake system into a ram air type. Other aftermarket induction kits mostly suck in hot air causing a loss of performance. The use of heatshields are not very affective as heat shields mainly work to block radiant heat. Utilizing the stock intake boxes, expect an 8-11whp gain with 70mph airflow. RPi Ram Air Kits come with a high performance BMC air filter.