With the installation of a Magnum FORCE Stage 1 intake system, you are removing the most restrictive part of the stock air intake system: the air filter and air box. You will feel an immediate improvement in acceleration and throttle response. However, Stage 1 retains the stock intake tract. Most Stage 2 kits come with a air box to turbo air tract and air box cover. AFE intakes consist of : 16-gauge powder-coated steel for durablility. Trim sealed to seal out hot engine air. Pre-positioned PEM-nuts for easier installation. Welded and pre-assembled sheet metal. Pre-positioned opening for stock attachments. 3-angle velocity stack adaptor on some applications. Powder-coated covers on some applications. 100% poly urethane construction – Durable, resistant to high temperature and chemicals. Deepest pleats – Greater flow and dust holding capacity. Rounded pleat geometry – Better airflow characteristics. Washable/reusable filter media – Longer service life. Full or modified velocity stack - Better, more airflow.