Baldwin PA3957 Air Filter

Baldwin PA3957 is an oval air filter element designed for engine air-intake systems that specify Baldwin PA-series replacements, delivering dependable filtration in a compact oval package with an axial seal. This PA-series part is classified as an oval engine air filter, featuring a short profile suitable for tight spaces and maintaining a solid seal against intake pressure fluctuations. Its dimensions place the overall height at 3-5/8 in, with the longest exterior axis spanning roughly 3-25/32 in to 4-13/32 in, highlighting its compact, engine-ready footprint. This makes PA3957 a direct drop-in replacement for equipment that lists Baldwin PA3957 in its filter requirements, and it is widely cross-referenced in external catalogs and OEM-equivalent listings, including references to Fleetguard AF25474, Hastings AF2422, and other PA3957 cross references. In practice, it serves engines and machines that depend on Baldwin PA-series oval air filters to prevent dust and particulates from entering the intake, helping protect performance and longevity in both automotive and industrial applications.