Genuine OEM Briggs & Stratton part number 27549S (replaces 27549, 555036). This gasket provides an airtight seal for the breather assembly, seated between the breather cap and the engine block. If you're servicing a classic flathead Briggs & Stratton engine in a lawn mower, tiller, generator, or go-kart, this genuine breather gasket is the correct OEM fix for a clean, lasting repair.
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