Onan 140-2897 Green Label Parts air filters are designed with a special foam pre-cleaner, for use specifically in Cummins Onan RV Generators. Other manufacturers' air filters may contain a lighter density filter paper and the sealing surfaces may get brittle and crack over time, allowing dirty air into the engine intake system. Over time, it only takes about a thimbleful of dirt to wear out piston rings and cylinders. Please refer to your Operators Manual for specific maintenance intervals. Fits Onan Generator Models: HDKAH (Spec A-K), HDKAH (Spec L-N), HDKAK (Spec A-K), HDKAK (Spec L-N), HQDPA (Spec A-C), HQDPC (Spec C), HDKAJ (Spec A-K), HDKAJ (Spec L). | Onan 140-2897 Air Cleaner Element, Diesel in Green