---
product_id: 42053034
title: "FILTERWEARS Pre-Filter F104K For Napa 6637 Donaldson B085011 Baldwin PA2818 Fleetguard AH1141 Fram CA6818 Wix 46637; BLACK"
brand: "filterwears"
price: "252.47 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Filterwears"
url: https://www.desertcart.tn/products/42053034-filterwears-pre-filter-f104k-for-napa-6637-donaldson-b085011-baldwin
store_origin: TN
region: Tunisia
---

# Hydrophobic, water-repellent fabric Heat resistant up to 450°F Blocks particles >0.005 in FILTERWEARS Pre-Filter F104K For Napa 6637 Donaldson B085011 Baldwin PA2818 Fleetguard AH1141 Fram CA6818 Wix 46637; BLACK

**Brand:** filterwears
**Price:** 252.47 DT
**Availability:** ✅ In Stock

## Summary

> 🛠️ Filter smarter, drive cleaner — don’t let dirt slow you down!

## Quick Answers

- **What is this?** FILTERWEARS Pre-Filter F104K For Napa 6637 Donaldson B085011 Baldwin PA2818 Fleetguard AH1141 Fram CA6818 Wix 46637; BLACK by filterwears
- **How much does it cost?** 252.47 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/42053034-filterwears-pre-filter-f104k-for-napa-6637-donaldson-b085011-baldwin)

## Best For

- filterwears enthusiasts

## Why This Product

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

## Key Features

- • **Built to Endure:** Crafted from 100% monofilament polyester, designed to withstand extreme heat and harsh conditions.
- • **Ultimate Engine Shield:** Protects your high-performance filter from dirt, debris, and water for longer life.
- • **All-Weather Reliability:** Hydrophobic fabric and zero functionality loss even in freezing temperatures keep your filter performing year-round.
- • **Cost-Saving Performance:** Extends filter service intervals, reducing maintenance expenses and downtime.
- • **Effortless Installation:** Straps at the base ensure a snug, secure fit—no hassle, just protection.

## Overview

The FILTERWEARS Pre-Filter F104K is a durable, water-repellent protective cover designed to extend the life of your automotive air filter by blocking particles larger than 0.005 inches. Made from heat-resistant monofilament polyester, it fits securely with base straps and maintains full functionality even in freezing temperatures, helping reduce maintenance costs and improve engine performance.

## Description

Buy FILTERWEARS Pre-Filter F104K For Napa 6637 Donaldson B085011 Baldwin PA2818 Fleetguard AH1141 Fram CA6818 Wix 46637; BLACK: Air Filters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Will save you money get it - I recently purchased the FILTERWEARS Pre-Filter F104K for my air filter and have been extremely satisfied with my purchase. The pre-filter is easy to install and fits securely over my air filter, providing an extra layer of protection. One of the things that I love most about the FILTERWEARS Pre-Filter is that it extends the life of my air filter. It captures larger debris and dirt particles before they can reach the main filter, which means that I don't have to replace my air filter as frequently. The pre-filter is also very durable and easy to clean. It is made of high-quality materials that can withstand harsh conditions and is resistant to water and UV light. Overall, I highly recommend the FILTERWEARS Pre-Filter F104K to anyone looking to extend the life of their air filter and protect their engine. It is a simple and effective way to improve the performance and longevity of your vehicle.
Review: Excellent cover for and AFE filter - I have the AFE washable filter in my 99 F350 7.3 diesel. The cover I got from Riff raff diesel does not cover the front of the cover, but does help keep the main body of the filter cleaner. It was time to clean the filter and look for something that more fully covers the front of the filer. Works great, Snug fit, and helps keep the top of the filer clean as well as the main body. Will likely add another to the pack. I like high flow filters, but have always added some type of cover for added filtration as well as protection of the engine. Very nice.

## Features

- Reduces overall maintenance cost, Extends filter service intervals, Adds convenience, Extends the life of any filter exposed or not
- Keeps your high performance filter free of debris/dirt and water, Effective barrier for any particle bigger than .005 inches
- No reduction of functionality in freezing temperatures, Hydrophobic fabric is standard (water repellent), Handles heat up to 450 degrees Fahrenheit
- Made from 100% monofilament polyester, with straps at the base of pre-filter for easy installation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01IU74BDQ |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #115,306 in Automotive ( See Top 100 in Automotive ) #1,582 in Automotive Replacement Air Filters |
| Brand | FILTERWEARS |
| Customer Reviews | 4.6 4.6 out of 5 stars (665) |
| Date First Available | July 21, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.13 ounces |
| Item model number | F104K |
| Manufacturer | FILTERWEARS |
| Manufacturer Part Number | F104K |
| OEM Part Number | B085011 |
| Product Dimensions | 5"L x 5"W x 7"H |
| Shape | Round |

## Product Details

- **Brand:** FILTERWEARS
- **Fit Type:** Vehicle Specific Fit
- **OEM Part Number:** B085011
- **Product Dimensions:** 5"L x 5"W x 7"H
- **Product Grade:** Replacement Part

## Images

![FILTERWEARS Pre-Filter F104K For Napa 6637 Donaldson B085011 Baldwin PA2818 Fleetguard AH1141 Fram CA6818 Wix 46637; BLACK - Image 1](https://m.media-amazon.com/images/I/61yJWNB7NaL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: What kind of fabrid is this?**
A: Hi,It is 100% polyester mesh and it filters debris bigger than .005". Helps keep the air filter clean at all times for maximum airflow.

**Q: What size in the inlet**
A: The listing is only for the blue pre-filter not air filter. Pre-filter has nothing to do with inlet.

**Q: How do you clean it?**
A: I've never cleaned it, I only dust it off very light with a cloth. I'm sure it can be washed off in mild soap and water.

**Q: Does this fit a Donaldson P527682 air filter?**
A: Most likely no.  That filter is larger than the ones this cover is made for in both diameter and length.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Will save you money get it
*by T***. on January 8, 2023*

I recently purchased the FILTERWEARS Pre-Filter F104K for my air filter and have been extremely satisfied with my purchase. The pre-filter is easy to install and fits securely over my air filter, providing an extra layer of protection. One of the things that I love most about the FILTERWEARS Pre-Filter is that it extends the life of my air filter. It captures larger debris and dirt particles before they can reach the main filter, which means that I don't have to replace my air filter as frequently. The pre-filter is also very durable and easy to clean. It is made of high-quality materials that can withstand harsh conditions and is resistant to water and UV light. Overall, I highly recommend the FILTERWEARS Pre-Filter F104K to anyone looking to extend the life of their air filter and protect their engine. It is a simple and effective way to improve the performance and longevity of your vehicle.

### ⭐⭐⭐⭐⭐ Excellent cover for and AFE filter
*by J***Y on July 26, 2023*

I have the AFE washable filter in my 99 F350 7.3 diesel. The cover I got from Riff raff diesel does not cover the front of the cover, but does help keep the main body of the filter cleaner. It was time to clean the filter and look for something that more fully covers the front of the filer. Works great, Snug fit, and helps keep the top of the filer clean as well as the main body. Will likely add another to the pack. I like high flow filters, but have always added some type of cover for added filtration as well as protection of the engine. Very nice.

### ⭐⭐⭐⭐⭐ Works great!
*by S***. on May 7, 2025*

Fit my 6637 knockoff filter very well. The red looks real good with black engine bay. Would buy again.

## Frequently Bought Together

- FILTERWEARS Pre-Filter F104K For Napa 6637 Donaldson B085011 Baldwin PA2818 Fleetguard AH1141 Fram CA6818 Wix 46637; BLACK
- Donaldson B085011 Filter

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-29*