AEM has pioneered the Cold Air Induction System (CAIS) for sport compacts. Their induction systems create more power than any other system. They relocate the filter outside of the engine compartment for a cooler intake charge. Every AEM air induction system is individually tuned in length and diameter, and features the highest standards of construction - AEM even guarantee's them for the life of your vehicle. Every AEM system is either C.A.R.B. exempt or pending C.A.R.B. exemption.