Baldwin Filters RS3737 Radial Inner Air Filter

Baldwin Filters RS3737 Radial Seal Inner Air Element is the inner filtration component designed for Baldwin radial-seal engine air filter housings, serving as the primary stage that protects the engine from dust and debris before the air enters the intake. This element-specific part measures 12-23/32 inches in length and 12-23/32 inches in height, with a 5-1/4 inch outside diameter (5-1/4 inch width), forming a precise fit inside compatible Baldwin housings. Made with cellulose/paper filtration media, the RS3737 delivers the essential barrier between the intake environment and the engine, maintaining airflow while trapping particulates. The radial-seal design helps ensure a tight seal against the housing to minimize unfiltered air bypass, contributing to consistent filtration performance and engine protection in automotive and light industrial applications. As an inner air element, it is intended to be used inside a matching outer filter assembly to complete the filtration path, and is a recognized Baldwin replacement for configurations that specify the RS3737 part number.