Light weight yet durable, K&N's Sprint Car Style Air Boxes are a must for any racer currently using traditional multi-Siamese stacks. Constructed from ultra-light weight carbon fiber K&N's Sprint Car Style air box provides ample air flow for your racing needs. As with all K&N filters, it is a washable and reusable air filter. Simply use K&N oil and cleaner to service your filter. This filter/air box measures 4 in. high, 13.75 in. wide, 18.813 in long. The filter is K&N® washable, reusable High-Flow Air Filters™ with a state-of-the-art design of layered, oiled cotton media engineered to improve airflow, improve power, and capture contaminants. This is the filter only, no base is included.