High-performance engines have enormous airflow needs, and racers are constantly looking for a little something extra that will give them an edge over the competition. AIRAID Race Day Filters are designed strictly to keep large debris out of the engine. Constructed with sturdy polyurethane casings and a durable wire mesh screen, they are built without any filtration media. Race Day Filters are intended for race day only and should only be used on concrete or asphalt racing surfaces such as a drag strip or road course. Track Day air filters are backed by a 90-day warranty. These filters are not intended for street use and are not recommended for any off-the-shelf cold air intake system that will be used in anything other than a controlled racing environment.