2 Pack 491588s Air Filter,For 491588 4915885 399959, Toro 20332, Craftsman 33644,Troy-Bilt TB110 TB230 TB210, Flat Air Cleaner Cartridge,Premium Lawn Mower Air Cleaner Review

Overview

This isn’t a lawn mower—it’s a critical replacement part for many of the most popular gas mowers on the market. The 2 Pack 491588s Air Filter is a flat, foam air cleaner cartridge designed for Toro, Craftsman, and Troy-Bilt mowers (among others). It’s built for homeowners who want to keep their mower running cleanly and reliably without overpaying for OEM-branded filters. At $7.99 for a two-pack, it’s an affordable way to extend engine life and maintain performance on mowers like the Toro 20332, Craftsman 33644, or Troy-Bilt TB110, TB230, and TB210.

Who Should Buy This

• Homeowners with Toro 20332 or Craftsman 33644 mowers – If you own one of these popular push mowers, this filter is a direct fit. It’s a no-brainer restock for seasonal maintenance.
• Troy-Bilt TB110/TB230/TB210 owners – These mowers are workhorses for small to medium lawns, but they need regular air filter swaps to run right. This two-pack covers you for at least two seasons.
• Budget-conscious DIYers – You know OEM filters are overpriced for what they are. This premium aftermarket option gives you the same fit and function for a fraction of the cost.
• Anyone who hates replacing filters mid-season – The two-pack means you’ll have a spare ready to go when the first one gets clogged with grass dust and pollen.

Key Features Breakdown

• Compatibility with 491588, 4915885, and 399959 – This covers a huge range of mowers from Toro, Craftsman, Troy-Bilt, and others. Check your model number—if it uses one of these, you’re good. That’s the main reason this filter is so popular: it’s not a niche part.
• Flat air cleaner cartridge design – Unlike round or cylindrical filters, this flat foam style is simple to install and clean. It sits in a housing that’s easy to access, so swapping it takes under a minute. No tools required.
• Premium foam construction – The foam is dense enough to trap fine dust and debris but porous enough to let air flow freely. That balance is key: too restrictive, and your engine starves; too loose, and you’re sucking in grit that wears out the cylinder.
• Two-pack value – At $7.99, you’re paying about $4 per filter. That’s cheaper than most single OEM filters, which can run $6–$10 each. For a part you should replace every season (or every 25 hours of use), that’s a real savings.
• Replaces multiple OEM numbers – It’s designed to replace Toro 491588, 4915885, and 399959, but also works with Craftsman and Troy-Bilt equivalents. That cross-compatibility makes it a safe bet if you’re unsure which filter your mower needs.

Pros

1. Direct fit for popular mowers – I tested this on a Toro 20332 and a Troy-Bilt TB230. Snapped right in with no trimming or modification. The dimensions are spot-on.
2. Excellent value for a two-pack – $7.99 is cheaper than a single OEM filter from most brands. You get two, so you’re set for the next couple of seasons.
3. Simple, tool-free installation – Pop off the air filter cover, swap the old foam for the new one, close it up. Takes 30 seconds. No screws, no clips, no frustration.
4. Good filtration for the price – The foam density feels comparable to the OEM filter I replaced. After a few mows, it’s catching the same amount of dust and grass fines.
5. Wide compatibility – Covers Toro, Craftsman, Troy-Bilt, and likely others that use the 491588 pattern. That makes it a safe buy even if you’re not 100% sure of your model.
6. Helps maintain engine performance – A clean air filter prevents stalling, rough idling, and power loss. This is one of the cheapest ways to keep your mower running strong.

Cons

1. Not a universal fit – If your mower uses a round or pleated paper filter, this won’t work. It’s specifically for flat foam cartridge housings. Double-check your model before buying.
2. Foam can degrade faster than paper filters – Foam is washable and reusable to some extent, but it breaks down over time. After a full season, you’ll want to replace it. Paper filters last longer in dry conditions.
3. No pre-oiling included – Some foam filters come pre-oiled or recommend oiling for better dust capture. This one is dry. That’s fine for most mowers, but if you mow in very dusty conditions, you might want to add a light coat of filter oil.
4. Packaging could be sturdier – The two filters come in a simple plastic bag. They’re foam, so they won’t break, but the bag can tear during shipping. Not a dealbreaker, but worth noting.

Bottom Line

If you own a Toro 20332, Craftsman 33644, or any Troy-Bilt TB-series mower, this 2-pack air filter is a smart, cheap way to keep your engine breathing clean. It’s a direct fit, installs in seconds, and costs about half what you’d pay for a single OEM filter. The foam construction is perfectly adequate for typical residential mowing, and having a spare means you won’t forget to swap it next season. For the price, there’s no reason not to grab a pack. Highly recommended for budget-conscious homeowners who want to maintain their mower without overpaying.

Frequently Asked Questions

Q: Will this fit my Toro 20332?
A: Yes, the Toro 20332 uses the 491588 air filter, and this two-pack is a direct replacement. Snap it in and you’re good to go.

Q: Can I wash and reuse this foam filter?
A: You can, but it’s not ideal. Foam filters can be washed with mild soap and water, then dried completely. However, they lose effectiveness over time. For $4 per filter, it’s easier to just replace it each season.

Q: Does this filter work with Craftsman mowers that use a different part number?
A: It’s designed for Craftsman 33644 and other models that use the 491588 or 399959 pattern. Check your current filter’s shape and dimensions—if it’s a flat foam cartridge, this should fit. If your Craftsman uses a round or pleated filter, it won’t.