Take YOUR diesel engine to the next level …with this GENUINE Walker high performance air filter. Designed as a direct replacement for Walker elements used in both the AIRSEP or high performance air filter housing, the robust construction make it the ideal for your marine diesel engine. Measures 12" diameter x 10" long. Benefits include: Washable and Reusable Resists clogging from moisture or oil Shipped ready to use Walker Part# CD204 Commonly found on marine engines such as: CAT3606E, DDC692, Cummins N14