Finding the right flatbed gas filler necks means prioritizing durability, compatibility, and install simplicity. This guide highlights five reliable options suited for service bodies, flatbeds, and work trucks. Each pick targets a common truck setup—Chevy, GMC, Dodge, Ford, and Ford Super Duty—so you can choose confidently based on your vehicle and use case. The top choices balance sturdiness with straightforward mounting, ideal for fleet upgrades or on-site repairs.
Summary table of selected products:
| Product | Best For | Key Benefit |
|---|---|---|
| Fuel Tank Filler Neck Pipe Diesel Replace 4C3Z9034C | Chevy, GMC, Dodge, Ford service bodies | Direct OEM-style replacement with mounting compatibility |
| Diesel/Gas Fuel Filler Neck Mount (2-3/8″ Center Hole) | Diesel and gas trucks with flatbeds | Versatile mounting pattern and center-hole fit |
| 2 In Diesel Fuel Filler Neck Mount Kit | Flatbed and utility trucks | Includes mounting hardware; steel construction |
| FN782 Fuel Filler Neck Hose with Cap | Ford Super Duty diesel models | Specific to 6.0L V8 diesel applications |
| Fuel Gas Filler Neck Mount (Chevy/GMC/Dodge/Ford) | General flatbed service bodies | Widely compatible mounting design |
Fuel Tank Filler Neck Pipe Diesel Replace 4C3Z9034C
This filler neck is designed as a direct replacement for late-model GM and related pickups with flatbeds or service bodies. Best for buyers who want OEM-like fit and straightforward installation, it supports trucks that used the 4C3Z9034C designation. It suits fleets that require a reliable, install-ready neck without extensive modifications. Limitation: confirm exact OEM compatibility for your specific year and cab configuration before purchase.
Why it’s a solid pick
- OEM-style replacement that aligns with factory dimensions
- Suitable for Chevy, GMC, Dodge, and Ford service bodies
- Simple mounting approach reduces downtime
Diesel/Gas Fuel Filler Neck Mount
This mount supports both diesel and gasoline installations with a 2-3/8 inch center hole and a 2-5/8 inch screw spacing. It’s appropriate for flatbed trucks and service fleets that require a flexible mounting pattern. Best for operators who want compatibility across multiple engine types and variations on common pickup chassis. Caution: verify the mounting hole spacing matches your existing caps and filler neck hardware.
Best use cases
- Flatbed and utility trucks needing cross-compatibility
- Diesel or gas applications where a durable steel mount is preferred
2 In Diesel Fuel Filler Neck Mount Kit
This kit provides a compact 2-inch diesel filler neck mount designed for flatbed and service trucks. It includes mounting hardware and leverages steel construction for durability. Best for fleets needing a compact, robust solution that fits within tight mounting spaces. Choose this if you have a 2-inch neck requirement and want hardware included to speed installation. Limitation: may not fit non-standard tank dimensions without additional adapters.
FN782 Fuel Filler Neck Hose with Fuel Cap
Designed for Ford F-Series Super Duty models (F-350, F-450, F-550) with 6.0L V8 diesel engines, this filler neck hose includes a fuel cap and is tailored for diesel applications. Best for owners upgrading or replacing factory components in Ford Super Duty trucks used in service or flatbed roles. Pick this if your truck uses the 6.0L diesel layout; avoid it if your engine does not match the specified Ford Super Duty generation.
Fuel Gas Filler Neck Mount for Chevy/GMC/Dodge/Ford
This mount offers broad compatibility across popular American trucks and flatbeds. It’s positioned as a general-use neck for service bodies and flatbed configurations, making it a versatile option for mixed fleets. Best for buyers seeking a single part that can adapt to several makes and models. Caution: verify that the screw spacing and hole size match your existing filler neck hardware to avoid misfit.
Buying Guide
What to consider when choosing a flatbed gas filler neck
- Vehicle compatibility: Confirm make, model, and year with your existing fuel system components.
- Mounting pattern: Check center hole diameter, screw spacing, and mounting hardware availability.
- Material and durability: Steel constructions tend to resist corrosion in fleet environments.
- Fuel compatibility: Diesel vs gasoline compatibility matters for long-term reliability.
- Installation complexity: Some kits include hardware and straightforward mounting steps; others may need adapters.
Best-fit scenarios
- Fleet service bodies and flatbeds needing OEM-like fit: choose products marketed as direct replacements.
- Mixed fleet with both diesel and gas engines: prioritize versatile mounts with universal patterns.
- Ford Super Duty diesel applications: target models specifically designed for 6.0L diesel configurations.
Installation and maintenance tips
- Prepare the mounting surface: clean threads and remove old hardware for a secure seal.
- Inspect seals and hoses for wear and replace as needed during neck swaps.
- Use appropriate thread sealant or gasket material if recommended by the OEM guidelines.
Common trade-offs to weigh
- OEM-like replacements vs generic mounts: OEM-style parts often offer easier alignment but may limit cross-model compatibility.
- Included hardware: Some kits include mounting hardware; others require separate purchases.
- Mounting space: Some necks are more compact, which helps in tight engine bays or under narrow cabs.
FAQ
- Q: Are these filler necks compatible with both diesel and gasoline trucks?
A: Some models are designed for both diesel and gas engines, while others target a specific fuel type. Check the product description for compatibility. - Q: Do these kits include mounting hardware?
A: Several listings mention hardware included, but verify before purchase to ensure you have all components needed for installation. - Q: Will a universal filler neck fit my truck’s gas tank shape?
A: Universal or broad-compatibility mounts are designed for multiple configurations, but always confirm hole spacing and hose compatibility with your tank. - Q: Is a Ford Super Duty specific neck required for diesel engines?
A: For diesel Ford Super Duty models, a neck designed for that engine and wiring layout is recommended to ensure proper seal and fit. - Q: Can I replace only the neck without changing hoses or caps?
A: In many cases, replacing the neck requires compatible hoses and caps; verify with the product’s included components and your current hardware.