2 Packs 491588S Air Filter, Lawn Mower Air Filter, Flat OEM Air Cleaner Cartridge, Compatible with Briggs and Stratton, Toro 20332, Craftsman 3364

What It Is

This is a 2-pack of flat foam air filter cartridges (OEM part 491588S) designed to replace clogged filters on walk-behind lawn mowers, specifically those using Briggs & Stratton engines found in Toro and Craftsman models.

Fitment & Compatibility

Before buying, measure your current filter: this cartridge is roughly 3.5 inches wide and 1.5 inches tall—common on many 140cc to 190cc Briggs & Stratton single-cylinder engines. Check your mower’s model number (e.g., Toro 20332, Craftsman 3364) and engine code (like 10T502 or 12A902). This is an aftermarket replacement for OEM part 491588S—works fine, but verify the gasket or foam seal on your old filter matches this flat style, not a pleated paper type. If your filter has a plastic housing that clips shut, this should drop in.

Key Things to Know

• Quality: Users report this fits snugly and filters well for the price—no reported leaks or engine damage. It’s foam, so washable and reusable with oil, but most replace it.
• Installation: Takes 30 seconds—pop off the air filter cover, swap the old foam, snap the cover back. No tools needed.
• Common Gotcha: Some mowers use a slightly thicker foam or a pleated paper filter—check yours before ordering. Also, this pack gives you a spare, but if you rarely mow, one filter lasts a full season.
• Note: Not for zero-turn or riding mowers—only walk-behind models with small flat filters.

Should You Buy It

If you own a Toro, Craftsman, or other mower with a Briggs & Stratton engine using a flat foam filter, this is a cheap, reliable way to keep your mower breathing easy and starting smoothly. The 2-pack is a smart deal for the price—buy it if you want a spare handy or maintain multiple mowers.