DNA Air Filters - Stage 2 Air Filter Cover for Honda X-ADV 750 21-23 / Forza 750 21-23 / NC 750 X 21-23This filter features DNAs Stage 2 kit eliminates the OEM intake snorkel of Honda models and offers higher performance and better intake sound. This Stage 2 kit is designed to replace the stock plastic air box intake cover. Combined with the P H75SC21 01 (sold separately) will increase the Airflow, Filtering Efficiency, Power, Torque and Throttle response. The airflow of this new DNA Stage 2 combined ALWAYS with the DNA Stage 1 Air Filter (P H75SC21