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AEM 15-16 Mazda 3 L4 2.0L F/I - Short Ram Air Intake System - aem21-773C missing-image -cc Gauges & Pods::Gauges 2000-2005AEM pioneered the Cold Air induction system for sport compact cars in 1994. A Cold Air intake system relocates the filter outside of the engine compartment to deliver the coolest air inlet temperatures possible. Cooler air carries more oxygen, which translates into a more intense explosion in the combustion chamber to create more horesepower and torque. But that's only part of the power equation. Tuning the inlet pipe in length and diameter to match