Infiniti QX56 04-06 AEM Cold Air Intake System. AEM Cold Air Induction systems deliver maximum performance gains through all aluminum, mandrel bent tubing, tuned in both length and diameter. All systems are finished in a Zirconia based powder coating to reduce heat penetration which can not be achieved with other finishes. The AEM Cold Air Induction system has been known to provide most applications with a substantial horsepower increase throughout the powerband.