"AEM induction systems feature CNC mandrel-bent 6061 aluminum intake pipes that are individually tuned in both length and diameter to maximize power in each application. Every AEM intake is powder coated and has TIG-welded fittings and brackets. For filtration, AEM utilizes its new lightweight urethane, four-layer cotton-gauze filter that features a redesigned air horn that makes an additional 1-3 HP on our Air Induction Systems. All AEM air induction systems are C.A.R.B. exempt or pending exemption (50 state legal) and come with complete installation hardware, comprehensive instructions, AEM decal and license plate frame. Available in: Powder coated Red, and Powder coated Blue FITMENT: 02-06+ WRX, 04-06+ STi, 04-06+ FXT, 04+ Baja Turbo "