This K&N 102mm 4" universal air filter is the perfect addition for any car tuning and styling enthusiast looking to enhance their vehicle's performance. The round tapered shape and high-quality construction of this cone filter make it a reliable choice for those seeking to improve their car's air intake and induction system. Crafted by K&N in the United States, this air filter boasts a reference OE/OEM number of RU2590 and another part number of 508770171. With a length of 9 inches, this performance air filter is designed to provide maximum airflow to the engine for a smooth and efficient ride.