This if for one K&N air filter and the upgraded air filter box that has more efficient air flow than the original stock air box in the Lincoln LS. This is used but in great shape. As you probably know the K&N filter never wears out. Just needs to be cleaned every 20K to 30K. It gives a slight improvement in horsepower and increases gas mileage. Only asking $30. Might consider separating. Please email me, or better yet, call me, if interested. I will do shipping at cost.