The muffler would have 1/2" NPT fitting.
Briggs & Stratton Muffler, OEM Replacement Part# 394569S

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- Briggs & Stratton Exhaust Muffler OEM replacement part# 394569S
- Genuine Briggs & Stratton Lo-Tone Muffler For 3 to 4 HP Vertical Engines with 1/2-Inch NPT
- Softens the noise coming from the engine and provides an additional layer of exhaust filtration
- Fits various Briggs Stratton and Toro models
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