Stens Muffler 105-254 | Replacement for Briggs & Stratton 391569S

Direct replacement muffler for Briggs & Stratton engines

The Stens muffler 105-254 is designed as a straightforward, direct replacement for Briggs & Stratton units that list 391569S, 391569, or 299477 as their OEM numbers. This part mirrors the factory footprint, mounting points, and overall shape, helping you maintain the familiar layout and sound profile of your outdoor power equipment.

Before purchasing, verify the part fits your Briggs & Stratton unit. Check your model number against the compatibility list and confirm the pipe thread and length match your existing setup to avoid mismatches.

Compatibility and replacements

• Replaces OEM numbers: Briggs & Stratton 391569S, 391569, 299477
• Fits Models: Briggs & Stratton 251412, 251416, 254422, 254427, 283702

Key specifications at a glance

• OD: 4 1/8 in
• Length: 7 7/8 in
• Pipe Thread: 1 in
• Pipe Length: 4 3/4 in
• No Assembly Required

Real-world use and considerations

Designed for routine maintenance, this muffler offers a direct path for exhaust flow and a familiar mounting interface. While results can vary by engine condition and environment, using a matched muffler helps preserve original geometry and noise characteristics without guessing on fit.

End-user notes: this part is presented as a compatible replacement rather than a guaranteed performance upgrade, so careful fit verification remains important before installation.