The aFe Stage 1 cold air intake outflowed the factory intake by up to 150%. This intake is a highly engineered heat-shielded air box with a welded-on adaptor for direct fitment to the stock intake tract. Handling filter duties is the PRO 5R performance air filter that features 5-layers of progressively finer mesh cotton gauze media. The PRO 5R filter is constructed with 100% polyurethane for long life and multiple cleaning cycles. Utilizing factory mounting points, this system provides a hassle free installation. Durable Heat Shield _ A one-piece powder-coated heat-shield is used to keep the air intake charge cool and dense. 4-1/2″ 360 Degree Air Filter _ A cone 360 degree round air filter is used for maximum flow and performance filtration (98.6% efficient). The PRO 5R performance air filter features 5-layers of progressively finer mesh cotton gauze media and is constructed with 100% polyurethane for long life and multiple cleaning cycles. Hassle-Free Installation _ aFe has developed this intake to provide a hassle-free installation that utilizes all factory mounting locations. This intake is 50-state legal (CARB E.O Number D-550-4).