DNA Air Filters - Stage 2 Air Filter Cover Combo for BMW R 1300 GS 23-24 / Kit ComboThis filter features DNAs Stage 2 kit eliminates the OEM intake snorkel of BMW models and offers higher performance and better intake sound. This Stage 2 kit is designed to replace the stock plastic air box intake. Combined with the P BM13E24 01 (sold separately) will increase the Airflow, Filtering Efficiency, Power, Torque and Throttle response. The airflow of this new DNA Stage 2 is +41. 20% more than the OEM BMW air box cover! Stock air box with