Baldwin Filters RS3501 Air Filter Inner 5-1/4 x 12-1/32 in

Baldwin Filters RS3501 Inner Air Filter

This Baldwin Filters RS3501 is a new automotive engine inner air filter with a radial design. It serves as the secondary filtration stage inside a two-stage air cleaner housing. The unit is built for heavy-duty equipment that demands reliable contaminant capture before air reaches the engine. Mechanics and fleet operators specify it when the inner element requires replacement during scheduled maintenance.

Replaces Worn Inner Elements In Two-Stage Housings

The filter replaces a used inner element that has reached its service limit or shows physical damage. A fresh element restores the intended airflow restriction and filtration efficiency of the original system. The jump is worth it when the outer filter has been changed but the inner element has not been inspected for an extended interval. Delaying replacement risks allowing fine dust past a saturated media pack.

Radial Media Maintains Flow Under Extended Intervals

The radial pleat geometry supports consistent airflow as the filter loads with fine particulate during long service periods. The construction resists collapse when the pressure differential increases across the media. This behaviour keeps the engine breathing cleanly between the outer filter changes that occur more frequently. The element dimensions are 5-1/4 by 12-1/32 in.