Briggs & Stratton Base-Air Cleaner 398592 Genuine OEM. This is a Genuine OEM Briggs & Stratton part. Choose this manufacturer-approved air filter pipe for your engine. This air filter pipe for a Briggs and Stratton single-cylinder engine attaches to the air filter at one end and the air intake of the carburetor at the other end. The air filter pipe can be used as a replacement part for engines with model numbers between 195400 and 195499 and type numbers- Briggs & Stratton Base-Air Cleaner 398592 Genuine OEM.