HomeAir and Fuel Delivery > Fuel StorageSpectra FN643 Fuel Filler Neck
Part #: FN643

Spectra FN643 Fuel Filler Neck

⚙️ 18 vehicles fit this part
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Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Dodge, Ram 2500 and Ram 1500
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Overview of Spectra Fuel Tank Filler Neck FN643

The Spectra FN643 fuel tank filler neck is designed specifically for Dodge Ram 1500 and Ram 2500 models. This component ensures a secure and reliable connection between the fuel filler cap and the fuel tank, maintaining proper fuel delivery and preventing leaks.

  • Compatible with Dodge Ram 1500 and Ram 2500
  • Durable construction for long-lasting performance
  • Direct replacement part number FN643
  • Ensures proper fuel flow and sealing
  • Corrosion-resistant materials

Detailed Product Description

The Spectra FN643 fuel tank filler neck is engineered to meet OEM specifications for Dodge Ram 1500 and Ram 2500 trucks. This fuel storage component connects the fuel filler opening to the fuel tank, providing a sealed path for fuel to enter the tank during refueling. Manufactured with corrosion-resistant materials, the FN643 part number ensures durability and resistance to environmental factors such as moisture and road debris. Its precise fitment reduces the risk of fuel leaks and vapor loss, which can affect vehicle performance and emissions compliance.

Common Applications and Problem Resolution

  • Replacement for damaged or corroded fuel tank filler necks on Dodge Ram 1500 and Ram 2500
  • Eliminates fuel leaks around the filler area
  • Prevents fuel vapor escape to maintain emission standards
  • Resolves issues with loose or ill-fitting fuel caps
  • Restores proper fuel flow during refueling

Installation Notes and Tips

Installation of the Spectra FN643 fuel tank filler neck requires basic mechanical skills and tools. It is recommended to inspect the fuel filler cap and surrounding seals during replacement to ensure a complete and secure fit. Proper alignment is critical to avoid fuel spillage and vapor leaks. Always work in a well-ventilated area and follow safety precautions when handling fuel system components.

Quality Assurance and Warranty

Spectra manufactures the FN643 fuel tank filler neck to meet strict quality standards, ensuring reliable performance for Dodge Ram 1500 and Ram 2500 vehicles. While specific warranty details may vary, Spectra parts typically come with a limited warranty against defects in materials and workmanship. Refer to the product documentation for exact warranty terms.

This part fits 18 vehicles. Search below:

YearMakeModelBody TypeLitersCylindersPositionNotes
2002DodgeRam 2500Standard Cab Pickup8.0LV10N/A
2002DodgeRam 2500Extended Cab Pickup8.0LV10N/A
2002DodgeRam 2500Standard Cab Pickup5.9LV8N/A
2002DodgeRam 2500Extended Cab Pickup5.9LV8N/A
2001DodgeRam 15005.9LV8N/A
2001DodgeRam 15005.2LV8N/A
2001DodgeRam 15003.9LV6N/A
2001DodgeRam 2500Standard Cab Pickup8.0LV10N/A
2001DodgeRam 2500Extended Cab Pickup8.0LV10N/A
2001DodgeRam 2500Standard Cab Pickup5.9LV8N/A
2001DodgeRam 2500Extended Cab Pickup5.9LV8N/A
2000DodgeRam 15005.9LV8N/A
2000DodgeRam 15005.2LV8N/A
2000DodgeRam 15003.9LV6N/A
2000DodgeRam 2500Standard Cab Pickup8.0LV10N/A
2000DodgeRam 2500Extended Cab Pickup8.0LV10N/A
2000DodgeRam 2500Standard Cab Pickup5.9LV8N/A
2000DodgeRam 2500Extended Cab Pickup5.9LV8N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

52102491AA577930D003FND04JLCD003TNKFN643

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.