Description
Product Overview
The iFJF Billet Aluminum Fuel Filter Cap is a permanent upgrade for the failure-prone OEM plastic fuel filter cap on 1999-2003 Ford 7.3L Powerstroke diesel engines. CNC-machined from 6061-T6 billet aluminum, this cap eliminates cracking, warping, and leaking — the three most common failures of the factory plastic cap. Includes 2 caps for complete replacement of both fuel filter housing caps. Fits F250, F350, F450, F550 Super Duty and Excursion.
Key Features
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CNC-Machined 6061-T6 Billet Aluminum: Precision-machined from solid aircraft-grade aluminum — infinitely more durable than the OEM plastic cap that cracks and warps from heat cycling.
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Permanent Upgrade: Unlike the factory plastic cap that needs replacement every few filter changes, this billet aluminum cap lasts the lifetime of your truck.
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7.3L Powerstroke Specific: Designed for 1999-2003 7.3L Powerstroke V8 diesel. Fits F250 F350 F450 F550 Super Duty and 2000-2003 Excursion. Replaces Ford F81Z9G270BA.
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Two-Pack Included: Both fuel filter caps included — one for the primary filter housing and one for the secondary. Complete upgrade in one purchase.
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Leak-Free O-Ring Seal: Machined O-ring groove ensures a consistent, leak-free seal every time — no more fuel seepage around the cap perimeter.
Specifications
| Specification |
Detail |
| Part Number |
FJ-CAP05-SI-2 |
| OEM Reference |
F81Z9G270BA, 1831193C91, RK31449, 904-203 |
| Material |
6061-T6 Billet Aluminum (Silver Anodized) |
| Engine |
7.3L Powerstroke V8 Diesel (1999-2003) |
| Quantity |
2 Caps (Both Filter Housings) |
| Fits |
F250 F350 F450 F550 1999-2003 | Excursion 2000-2003 | E350 E450 E550 2003 |
| Thread |
Standard OEM Thread Pattern |
| Warranty |
Lifetime Warranty Against Manufacturing Defects |
Why Choose iFJF?
The OEM plastic fuel filter cap on the 7.3L Powerstroke is a well-documented failure point. The plastic degrades from diesel fuel exposure and heat cycling, eventually cracking or stripping threads — potentially leaving you stranded with a fuel leak. Our billet aluminum cap is a one-time fix. Install it once and never worry about a cracked fuel filter cap again. This is one of the highest-ROI upgrades for any 7.3L Powerstroke owner.
Frequently Asked Questions
Q: Will this fit my 2001 F350 7.3L Powerstroke?
A: Yes. Direct replacement for all 1999-2003 7.3L Powerstroke fuel filter housings in F250 through F550 Super Duty and Excursion.
Q: Why upgrade from the plastic OEM cap?
A: The OEM plastic cap (F81Z9G270BA) is notorious for cracking, warping, and leaking — especially after repeated filter changes. This billet aluminum cap permanently solves that problem.
Q: Does this include the O-ring?
A: Yes. The cap incorporates an O-ring groove designed to work with the standard OEM fuel filter O-ring that comes with your replacement filter.
Q: Is this for both filter housings?
A: Yes. This 2-pack includes caps for both the primary and secondary fuel filter housings on the 7.3L Powerstroke.
Q: Will this fit the 6.0L or 6.4L Powerstroke?
A: No. This cap is designed specifically for the 1999-2003 7.3L Powerstroke fuel filter housing. The 6.0L and 6.4L use different filter systems.
Q: Does this require any modifications?
A: None. Same thread pattern and dimensions as the OEM cap. Simply remove the old plastic cap, swap the O-ring onto the new billet cap, and thread it on.
Q: Can I overtighten this?
A: The billet aluminum cap is much stronger than plastic, but we still recommend hand-tightening firmly — approximately 18-22 ft-lbs. Overtightening is not necessary with the precision-machined sealing surface.
