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Cylindrical automotive inner air filter, radial pleated element, metal end caps

Baldwin Filters

Baldwin Filters RS3930 Automotive Engine Inner Air Filter Radial Element Only

SKU CH-AEJX-2W691

An automotive engine inner air filter with a radial design and element-only construction

  • Radial design fits tight engine compartments
  • Inner filter position protects primary element from debris
  • Baldwin Filters brand trusted by heavy-duty fleets
  • 1-13/16 inch outside diameter matches OE specs
  • 6-5/8 inch height ensures full airflow capacity

Engine Inner Air Filter

The Baldwin Filters RS3930 is a radial-style inner air filter built for automotive engines. It serves as the secondary element inside a two-stage housing, capturing fine particles that pass the outer filter. Mechanics and fleet managers use it to maintain clean airflow in heavy-duty and commercial power units.

Service Interval and Airflow

A clean radial element keeps restriction low so the engine breathes efficiently during normal operation. When the element loads with dust, restriction rises and can increase fuel consumption or reduce power. Replace the filter at the interval specified by the engine manufacturer to maintain intended performance.

Radial Element Only

This part is the filter element alone; no housing, clamps or gaskets are included. The radial design fits into the existing inner cavity of the air cleaner assembly. Verify the housing dimensions and sealing surfaces before installation to ensure a proper seal.

Highlights

  • Radial design fits tight engine compartments
  • Inner filter position protects primary element from debris
  • Baldwin Filters brand trusted by heavy-duty fleets
  • 1-13/16 inch outside diameter matches OE specs
  • 6-5/8 inch height ensures full airflow capacity

Specifications

BrandBALDWIN FILTERS

Questions about this item

How do I install the Baldwin RS3930 inner air filter and what step is often missed?

Insert the radial element into the housing so the 1-13/16 in. outside diameter seats evenly, then secure the cover; the step most often missed is verifying the seal sits flat all around before clamping.

What maintenance or replacement will the Baldwin RS3930 need later?

Replace the inner radial element at the engine manufacturer's recommended interval or when restriction reaches the specified limit; no cleaning or re-oiling is required for this dry-media design.

What limit appears first on the Baldwin RS3930 during sustained operation?

The first limit is airflow restriction — as dust loads the radial pleats, pressure drop rises until the service indicator signals replacement.

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