A Core deposit is a form of deposit you pay until returning your old part. If you don't have the core at the time of purchase, you must pay the core charge. That charge is refunded to you when you return the core.
WIX is a recognized leader in air filter performance and efficiency for passenger cars, light trucks, heavy trucks and buses, and off-highway vehicles. In fact, they're the only filters officially licensed by NASCAR and have even developed a line of high performance filters specifically designed for racing applications.