---
product_id: 2218513
title: "491588S Genuine Flat Air Filter | 5-1/4\" L x 4-1/4\" W x 3/4\" H; Quantum & 625-675 Series engines"
brand: "briggs & stratton"
price: "$21.25"
currency: USD
in_stock: true
category: "Briggs & Stratton"
url: https://www.desertcart.us/products/2218513-491588s-genuine-flat-air-filter-5-1-4-l-x
store_origin: US
region: United States of America
---

# Durable plastic build Optimized airflow Direct-fit precision 491588S Genuine Flat Air Filter | 5-1/4" L x 4-1/4" W x 3/4" H; Quantum & 625-675 Series engines

**Brand:** briggs & stratton
**Price:** $21.25
**Availability:** ✅ In Stock

## Summary

> 🌿 Breathe new life into your mower — because your engine deserves the best!

## Quick Answers

- **What is this?** 491588S Genuine Flat Air Filter | 5-1/4" L x 4-1/4" W x 3/4" H; Quantum & 625-675 Series engines by briggs & stratton
- **How much does it cost?** $21.25 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/2218513-491588s-genuine-flat-air-filter-5-1-4-l-x)

## Best For

- briggs & stratton enthusiasts

## Why This Product

- Trusted briggs & stratton brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dust & Debris Defense:** Blocks harmful particles to extend engine life and reduce wear
- • **Lightweight & Durable:** Crafted from sturdy plastic for long-lasting reliability without added bulk
- • **Perfect Fit, Zero Hassle:** Direct-fit design tailored for Briggs & Stratton small engines
- • **Engineered for Peak Performance:** Keeps your mower engine breathing clean for maximum efficiency
- • **Individually Packaged for Freshness:** Ensures every filter arrives in pristine condition, ready to perform

## Overview

The Briggs & Stratton 491588S Genuine Flat Air Filter is a precision-engineered, direct-fit replacement designed specifically for Briggs & Stratton small engines. Made from durable plastic, it effectively blocks dust and debris to maintain optimal engine performance and longevity. Lightweight and individually packaged, this air filter ensures your lawn mower runs cleaner and more efficiently, backed by a trusted brand with a 1-year limited warranty.

## Description

Help keep your lawn mower engine breathing clean air with the genuine Briggs & Stratton 491588S air filter. Designed as a direct-fit lawn mower air filter for compatible Briggs & Stratton small engines, it helps block dust and debris before they reach critical engine components. Review ENGINE FITMENT and REPLACMENT PART NUMBERS before purchase to confirm fit.

## Features

- Material Type: Plastic
- Power Source Type: Non Powered
- Helps keep your engine running at peak performance
- Individually packaged part

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0011WP4Q6 |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #9,737 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #25 in Lawn Mower Air Filters |
| Brand | Briggs & Stratton |
| Brand Name | Briggs & Stratton |
| Customer Reviews | 4.8 out of 5 stars 22,630 Reviews |
| Fit Type | Vehicle Specific Fit |
| Global Trade Identification Number | 00004915880009, 00024847239508 |
| Included Components | Air Cleaner Cartridge Filter |
| Item Dimensions L x W x H | 5.25"L x 4.5"W x 0.8"H |
| Item Type Name | Air Cleaner Cartridge Filter |
| Item Weight | 0.02 Pounds |
| Manufacturer | Briggs and Stratton |
| Manufacturer Part Number | 491588S |
| Manufacturer Warranty Description | 1 Year Limited |
| Model Number | 491588S |
| Number of Items | 1 |
| OEM Equivalent Part Number | 491588S |
| OEM Part Number | 491588S |
| Product Dimensions | 5.25"L x 4.5"W x 0.8"H |
| Product Grade | Performance Part |
| Shape | Square |
| UPC | 715256431187 798256112904 004915880009 024847239508 043948097923 759754992368 799742093554 071032000559 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Briggs & Stratton
- **Fit Type:** Vehicle Specific Fit
- **OEM Part Number:** 491588S
- **Product Dimensions:** 5.25"L x 4.5"W x 0.8"H
- **Product Grade:** Performance Part

## Images

![491588S Genuine Flat Air Filter | 5-1/4" L x 4-1/4" W x 3/4" H; Quantum & 625-675 Series engines - Image 1](https://m.media-amazon.com/images/I/61C2gjg7k4L.jpg)

## Questions & Answers

**Q: Is this a Briggs and Stratton branded filter? Thanks**
A: Received 5 unmarked filters, not Briggs and Stratton, from my order of 8-15-18, which I returned through Amazon's excellent returns policy. According to B&S, who I called, "all our filters are stamped with our name and product number on the sides".

**Q: I have a Toro model 20372 with 6.5 HP engine. The engine is made by Toro, not Briggs and Stratton, Tecumseh, Honda, etc. Will filter fit this engine?**
A: to "cbow" and "nikko" and any others who answered "no" to my question.....you are all wrong!!!!!! this filter is a perfect fit for my mower described in my question. glad i checked locally. maybe in the future you could either give accurate answer or no answer at all to a question you don't know the correct answer to.

**Q: Is the size exactly 5-1/4 x 4-1/2 x 1 in. ?  The production at listing says different.**
A: I just went down in the basement and measured it, and yes, the dimensions are exactly what you said.  Good luck!

**Q: i have a push mower .. briggs and stratton quantum power model #22545x92E .. about 15 years old ..  22" murray.  i need an air filter ..  please help!**
A: Thank you for considering AMC Parts Store for your mower parts.This is a very popular air filter for smaller Briggs engines.However, to be sure, we will need the ENGINE model #, type, and code to research it for you.It may look something like 125K02-0126-01.

## Frequently Bought Together

- Briggs & Stratton 491588S Flat Air Filter Cartridge
- Briggs & Stratton 493537S Filter Pre-Cleaner

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-26*