I started out with an AirAid MIT, which replaces the Hemi hat and connects to the stock air filter box. Recently I removed the air box and fabricated my own CAI from the MIT to the filter using the AirAid UBI (you build it) kit. I used the 4 inch kit with a Spectre Performance 9702 mounting bracket. The bracket is great because it surrounds the 4 inch tube. I used the front hole left by the air box to bolt it on the wheel well. I am using the AEM DryFlow 9 inch cone filter and the hump hose for the filter fits nicely inside the end of the Spectre bracket. This setup really breathes deep and sounds great. I don't have fog lights, so the passenger side fog light hole has 4 inch aluminum elbow in it to direct cool air to the filter.