CORSA Performance Maxflow 5 Filters offer a washable and reusable replacement to your stock air filter unleashing greater airflow for peak performance gains. Each Maxflow 5 Filter is engineered utilizing carefully selected media that delivers superior engine protection and up to 98 filter efficiency and maximum flow. By carefully designing the pleat structure of the Maxflow 5 Filter, loading capacity has increased allowing for extended maintenance intervals (Up to 40K Miles). Each filter is manufactured using a 100 polyurethane frame and flanges with progressive fit ribbing to create a reliable air - tight mesh point between filter and air duct.