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The aFe ProGuard 7 air filter 44-LF004-MB is a high-flow replacement filter built to outperform the factory paper element in both filtration efficiency and airflow. Engineered from seven-layer synthetic media, this filter delivers measurably higher flow rates than stock while maintaining the filtration needed to protect your engine. The 44-LF004-MB installs directly into your factory airbox in minutes using no tools and no modification, making it the fastest upgrade you can make to your intake system.
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 1994-1996 | Ford | F-250 | XL |
| 1994-1996 | Ford | F-250 | XLT |
| 1994-1997 | Ford | F-350 | XL |
| 1995 | Ford | F-350 | Eddie Bauer |
| 1995-1996 | Ford | F-250 | Eddie Bauer |
| 1995-1996 | Ford | F-250 | Special |
| 1995-1996 | Ford | F-350 | Special |
| 1995-1998 | Ford | E-350 Econoline | |
| 1995-1998 | Ford | E-350 Econoline | XL |
| 1995-1998 | Ford | E-350 Econoline Club Wagon | XL HD |
| 1995-1998 | Ford | E-350 Econoline Club Wagon | XLT HD |
| 1995-2000 | Ford | E-350 Econoline Club Wagon | Custom |
| 1995-2002 | Ford | E-350 Econoline Club Wagon | Chateau |
| 1995-2002 | Ford | E-350 Econoline Club Wagon | XLT |
| 1997 | Ford | F-250 HD | XLT |
| 1997 | Ford | F-350 | |
| 1999-2000 | Ford | E-350 Super Duty | XL |
| 1999-2003 | Ford | F-250 Super Duty | Lariat |
| 1999-2003 | Ford | F-250 Super Duty | XL |
| 1999-2003 | Ford | F-250 Super Duty | XLT |
| 1999-2003 | Ford | F-350 Super Duty | Lariat |
| 1999-2003 | Ford | F-350 Super Duty | XL |
| 1999-2003 | Ford | F-350 Super Duty | XLT |
| 2000-2003 | Ford | Excursion | Limited |
| 2000-2003 | Ford | Excursion | XLT |
| 2001-2002 | Ford | E-350 Econoline Club Wagon | XL |
| 2003 | Ford | E-350 Club Wagon | Chateau |
| 2003 | Ford | E-350 Club Wagon | XL |
| 2003 | Ford | E-350 Club Wagon | XLT |
| 2003 | Ford | Excursion | Eddie Bauer |
| 2003 | Ford | F-350 Super Duty | King Ranch |
| Detail | Value |
|---|---|
| Part Number | 44-LF004-MB |
| Brand | aFe Power |
| Filter Media | ProGuard 7 |
| Filter Type | High-Flow Replacement |
| Reusable | Yes |
| UPC | 802959441299 |
Under normal conditions, clean and re-oil your aFe ProGuard 7 filter every 30,000 to 50,000 miles. In dusty environments, inspect it more frequently. Always use aFe Power's dedicated cleaning and oiling kit for proper maintenance.
Will this filter increase horsepower over the OEM paper element?Yes. The 44-LF004-MB flows significantly more air than the factory disposable paper filter, allowing the engine to breathe more freely. In combination with a full intake system, gains are more pronounced, but a filter upgrade alone delivers measurable improvement in throttle response.
Can I over-oil this filter and damage my MAF sensor?Yes, it is possible to apply too much oil when reconditioning a wet-media filter. Always apply oil lightly and evenly, allow it to wick for 20 minutes, and blot any excess before installation. The ProGuard 7 .
Does this filter fit my factory airbox without modification?Yes. The 44-LF004-MB is precision-molded to the exact dimensions of the OEM filter element. It drops directly into your factory housing and seals against the factory airbox lid without any trimming or modification.
How does a reusable filter compare to replacing with a new OEM filter?Over a typical ownership period, a reusable aFe filter costs less to maintain than buying replacement OEM paper filters every 15,000 to 20,000 miles. It also consistently outflows the OEM element throughout its service life rather than degrading as the paper loads up with debris.
Will this filter void my factory warranty?Under the Magnuson-Moss Warranty Act, a dealer must demonstrate a direct causal link between your aftermarket filter and a specific failure to deny a warranty claim. A high-flow air filter cannot be used as a blanket reason to void your powertrain warranty.
Is this filter compatible with a cold air intake tube?This is a drop-in filter designed for use in a factory airbox. If you are building a full cold air intake, aFe Power offers intake systems designed around their filter canisters. Contact us to find the correct intake system for your build.
What is the warranty on this air filter?aFe Power provides a limited manufacturer warranty on materials and workmanship. As a reusable filter, warranty claims related to improper cleaning or oiling are excluded. Contact aFe Power or us for current warranty documentation.
WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
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