Engine Air Filter Original Equipment Part Number 57MD42M Fits Donaldson ECG11 Housing Overview This engine air filter is a direct replacement for applications using the ECG11 housing and carries the original equipment part number 57MD42M. It is manufactured to OE standards using modern tooling and durable materials, providing reliable filtration and a straightforward installation that matches factory fit and function. Key benefits Direct fit: Designed to install seamlessly in ECG11 housings, matching the dimensions and sealing characteristics of the factory unit. OE quality and consistency: Manufactured to the same specifications used in original equipment production, ensuring proper fit and performance. Durable materials: Built from robust filter media and structural components that offer longer service life compared to standard OEM materials. Maintains engine performance: Effective particulate capture protects intake systems and helps preserve engine power and fuel efficiency over time. Easy replacement: Dropin design minimizes downtime during routine maintenance or field servicing. Function and performance Primary function: Removes airborne dust and particulate contamination from intake air before it reaches the engine. Filtration performance: Engineered to provide efficient particulate retention while maintaining adequate airflow for normal engine operation. Durability: Reinforced construction resists collapse and deformation under typical operating conditions. Compatibility and fitment Original Equipment Part Number: 57MD42M Compatibility: Fits ECG11 housing (compatibility reference provided for user verification) Fit type: Direct replacement for the factory unit; designed to match housing seals and mounting interfaces Materials and construction Filter media: efficiency particulate media selected for durability and consistent filtration performance Structural components: Reinforced end caps and core to maintain form and sealing under vibration and temperature changes Typical use scenarios 1. Routine maintenance: the air filter during scheduled service intervals for engines equipped with ECG11 housings to maintain clean intake air and consistent engine operation. 2. Field or service repairs: Onsite replacement for equipment operating in dusty or abrasive environments where efficient filtration and quick installation reduce downtime. 3. Fleet and industrial equipment: Use as a reliable spare for heavy machinery, generators, or mobile equipment that require the 57MD42M filter size and ECG11 housing compatibility. Why choose this replacement This filter provides the practical advantages of a directfit, OEspec replacement built with improved durability. It simplifies maintenance by fitting without modification and helps protect engine components through consistent filtration performance. Fitment note Confirm compatibility with equipment using ECG11 housing and original equipment part number 57MD42M before .