AfE Power 31-10181 Performance Air Filter Improve power and acceleration while maintaining your OEM air box 100% polyurethane frame on all sides for extra long filter life Washable and reusable for multiple cleaning cycles 3-Layer non-oiled, washable synthetic media for the perfect balance of performance, protection and convenience Fits Audi A4 09-18 / Q5 09-17 I4-2.0L (t) Improves airflow for better performance and acceleration Oil-free for easy quick servicing and yet washable/reuseable air filter for long service life with life-time warranty Pro DRY S Three-Layer Progressively finer porosity synthetic media for high airflow with high filtration efficiency. Tall, Rounded, evenly-spaced pleats for maximum dust holding capactiy Constructed with 100% pliable polyurethane for great seal without use of foam gaskets or sealing grease.