Baldwin Filters PA3970 automotive air filter 6-1/2 x 3-21/32 in

Baldwin Filters PA3970 automotive air filter

This Baldwin Filters PA3970 is an automotive engine air filter built for vehicles that require a round filter element. It fits installations where the housing accepts a 6-1/2 inch outside diameter and a 3-21/32 inch height. The element-only design installs directly into the factory air box without additional hardware. Mechanics and vehicle owners use it to maintain clean airflow to the engine.

Round element with 6-1/2 in outside diameter

The critical specification is the round element measuring 6-1/2 inches in outside diameter and 3-21/32 inches in height. These dimensions must match the air-box cavity exactly; a mismatch will prevent a proper seal and allow unfiltered air into the engine. Verify the housing measurements before ordering to ensure compatibility with the intended application.

Sustained filtration under continuous engine

Under sustained load the filter media continues to trap dust and debris while maintaining airflow to the engine. The round element design distributes contaminant loading evenly across the surface area during extended driving cycles. Regular inspection at service intervals confirms the element remains intact and unrestricted for consistent engine protection.