Custom filter for Nissan Maxima, original. 1. Company: AEM 2. Increases horsepower by 12 according to the company. The filter is almost new, used for less than a week and comes in its box. Includes all accessories, meaning you don't need to bring anything, just remove and install. The reason for selling is that I sold the car. The filter was purchased for 1600. Selling to the highest bidder.