The best fuel tank filler neck and cap depends on the tank and vehicle: choose the FN782 options for specified Ford Super Duty trucks, a 577-824 replacement for listed Chevrolet and GMC models, or the vented threaded cap for a transfer tank. The comparison below highlights the stated fitment and purpose of each option. Verify the year, model, engine, and replacement part number before ordering.
| Product | Best For | Key Detail |
|---|---|---|
| JAVOUKA FN782 | Ford F-350, F-450, and F-550 | Lists selected 2002–2007 fitment |
| Forwinparts 577-824 | Chevrolet and GMC trucks and Suburbans | Filler neck tube with cap |
| Tykick FN782 | Broader listed Ford Super Duty years | Lists multiple engine sizes and replacement numbers |
| Transfer Tank Vented Cap | Transfer and auxiliary tanks | Two-inch threaded cast-iron base |
| Chevy/GMC 577-824 Neck | Listed 1988–2000 Chevrolet and GMC models | Includes filler neck and cap |
JAVOUKA FN782 Neck For Ford Super Duty
This filler neck hose and cap is best for buyers replacing an FN782-style part on a compatible Ford Super Duty. The listed applications include Ford F-350 models from 2002–2007 and F-450 and F-550 models from 2005–2007. The product information also identifies a 6.0L V8 diesel engine for its specified 2005–2007 fitment.
Its listed cross-reference numbers include FN782, 8C3Z9034LE, 8C3Z9034LF, and 577-306. It was selected for its clear Ford-focused application and part-number references. Caution: The listed years differ by truck model, so do not assume every F-350, F-450, or F-550 in the range fits. Confirm the exact application before purchase.
Forwinparts 577-824 Neck With Cap
This filler neck tube and cap is best for owners of the listed 1988–2000 Chevrolet C- and K-series pickups and Suburbans. The application details cover C1500, C2500, C3500, K1500, K2500, and K3500 models, including certain Suburban applications. It was selected as a vehicle-specific option for buyers seeking a neck and cap together.
Forwinparts lists a one-year unlimited-mileage guarantee and invites customers to contact the seller with questions during that period. Caution: The application list does not specify every model-year combination for each body style. Check the vehicle’s exact year and configuration rather than relying on the broad 1988–2000 range alone.
Tykick FN782 Ford Filler Neck
Choose this Tykick neck if its listed Ford Super Duty years and engine details match your truck. The product names F-350 models from 1999–2005, F-450 from 1999–2007, and F-550 from 1999–2010, with engine listings that vary by model and year. It references FN782, 577-306, 4C3Z9034C, and several other part numbers.
This option is best for buyers who want a broader stated year range and multiple cross-reference numbers to compare. Caution: Compatibility is not uniform across all three truck models, and the listing itself advises buyers to verify fitment. Match the engine and part number, not just the vehicle name.
Vented Cap For Transfer Tanks
This product is best for transfer, auxiliary, farm, or commercial tanks that use a compatible threaded cap—not as a vehicle-specific filler neck replacement. Its listed design includes a removable vented cap and a two-inch heavy-duty cast-iron base. The seller describes the cap as allowing air in and releasing tank pressure when loosened.
It was selected because some buyers searching for a fuel tank cap need a vented closure for a separate tank system. The listing also mentions diesel and other fuel tank uses. Caution: This is a cap and base, not a filler neck hose assembly, and the provided information does not identify a vehicle fitment. Confirm thread and opening dimensions before choosing it.
Chevy And GMC 577-824 Replacement Neck
This replacement filler neck and cap is best for buyers whose Chevrolet or GMC vehicle matches the stated application. The listing names C1500, C2500, C3500, K1500, K2500, and K3500 pickups from 1988–2000, plus Suburban models from 1992–1993. It references 577-824, FN525, FN506, 15003858, and 15712144.
It was selected as another 577-824-style option for the specified Chevrolet and GMC applications, with both the neck and cap listed in the package. Caution: Its Suburban years are narrower than its pickup range. Verify the exact vehicle and replacement number because the listing does not establish fitment for every model-year combination.
Buying Guide: How To Choose A Filler Neck And Cap
Does the part fit the exact vehicle?
Start with the vehicle’s make, model, year, and engine. A broad fitment range may cover different years for different truck models. Compare the product’s specific application details with your vehicle rather than assuming that a shared model name guarantees a match.
Should you compare replacement numbers?
Use the original part number, when available, as an additional check. Cross-reference numbers can help narrow the choices, but they do not replace checking the listed vehicle fitment. The Ford products reference FN782 and 577-306, while the Chevrolet and GMC options list numbers such as 577-824 and 15003858.
Do you need a neck assembly or only a cap?
A filler neck hose with cap is intended for a vehicle application described by its listing. A vented transfer-tank cap serves a different purpose and is not presented as a vehicle-specific neck replacement. Choose based on the tank opening and the component that needs replacing.
What details should you confirm before ordering?
- Exact vehicle year, model, and engine, where specified.
- Whether the package includes a cap, neck, or both.
- Replacement numbers and any stated opening or thread dimensions.
- Whether the product is designed for a vehicle tank or a transfer tank.
Frequently Asked Questions
Can one filler neck fit every Ford Super Duty year listed?
No. The listed year ranges differ among F-350, F-450, and F-550 applications. Check the exact truck model, year, engine, and part number.
Are the two Chevrolet and GMC necks listed for the same vehicles?
They share several pickup applications and the 577-824 reference, but their stated details are not identical. One listing includes its own application information, while the other specifies Suburban models for 1992–1993. Verify your vehicle against the individual listing.
Is the transfer tank cap a replacement for a truck filler neck?
It is described as a vented cap for transfer and related tanks, not as a vehicle-specific filler neck hose assembly.
Why does a fuel tank cap need to vent?
The transfer-tank listing says its venting function releases pressure and allows air into the tank. Use a cap suited to the tank’s design and specified opening.