Briggs & Stratton 491055S - 2 Pack

What It Is

This is an OEM 2-pack of replacement foam air filter elements for Briggs & Stratton engines, designed for use in push mowers, riding mowers, and other outdoor power equipment that uses a pre-cleaner or dual-element air filtration system.

Fitment & Compatibility

Before buying, confirm your engine uses a foam pre-filter (not just a paper filter). Check your engine’s model, type, and code numbers (stamped on the valve cover or blower housing) and cross-reference with Briggs & Stratton’s official parts lookup. This filter fits many Briggs engines with a 3.75" x 2.25" x 0.75" foam element, including common series like 450E, 500E, 550E, 625E, 675EX, 725EX, and some Intek models. It is also used on some Troy-Bilt, Craftsman, Snapper, and Murray mowers. Measure your old filter’s dimensions and compare to the listed 3.75" x 2.25" x 0.75" size to avoid mismatch. OEM part number 491055S replaces earlier 698369 and 594416.

Key Things to Know

• Quality: OEM Briggs part—better fit and filtration than most generic foam filters. The 2-pack is a solid value.
• Installation: Very easy: remove the old foam, clean the housing, oil the new foam with air filter oil (not engine oil), squeeze out excess, and reinstall. Takes under 5 minutes.
• Common Gotcha: Running without a properly oiled foam filter lets dirt into the engine. Use a dedicated foam filter oil (e.g., Briggs 5041K) for best results.
• Maintenance: Clean and re-oil every 25 hours or annually under normal use; replace when it tears or loses shape.

Should You Buy It

If your Briggs engine uses this specific foam pre-filter, this 2-pack is a cheap, reliable OEM choice that beats aftermarket knockoffs in fit and filtration. It’s ideal for routine maintenance on push mowers and riders—just verify your engine model and filter dimensions first.