AEM Cold Air Intake System (AEM 21-483) Mazda 03-06 Mazda-6 (6 Cyl.) Mazda 6 AEM Cold Air Intake System is specifically tuned in length and diameter to give your Mazda 6 maximum horsepower gains. It combines the highest standards of construction and the best industry standards to eke out optimum performance from your Mazda 6. Mazda 6 AEM Cold Air Intake System gives you better mileage and deepens the sound of your Mazda 6 making it more aggressive as you step on the throttle. * AEM Cold Air Intake System helps you gain more Horsepower for your Mazda 6 than any of its competitors.