Spectra FN631 Fuel Tank Filler Neck

Spectra FN631 Fuel Tank Filler Neck

The Spectra FN631 fuel tank filler neck is an OE-style replacement for select GM full-size cars from 1998-1999. It is built to match original equipment performance standards for a direct repair on the fuel storage system.

• Fuel tank filler neck for air and fuel delivery applications
• OE replacement for select Buick, Oldsmobile, and Pontiac models
• Built with Spectra Premium engineering and manufacturing controls
• Direct-fit replacement for vehicles with the specified cap and filler neck configurations
• Part number FN631 for catalog and cross-reference lookup

Vehicle Fitment

Compatible With 1998-1999 Buick LeSabre, w/o threaded gas cap. Compatible With 1998-1999 Oldsmobile 88, w/o threaded gas cap. Compatible With 1998-1999 Oldsmobile LSS, w/o threaded filler neck. Compatible With 1998-1999 Pontiac Bonneville, w/o threaded filler neck. Compatible With 1998 Oldsmobile Regency, w/o threaded gas cap.

This part cross-references AMS Automotive 6613 for the same application.

What This Part Helps Address

• Corrosion or damage in the original filler neck
• Fueling issues caused by a worn or restricted neck
• Leaks at the fuel tank fill connection
• Fitment problems after replacement of the original neck
• Restoration needs on Buick LeSabre, Oldsmobile 88, Oldsmobile LSS, Pontiac Bonneville, and Oldsmobile Regency fuel systems

Installation Notes

Verify the vehicle’s cap style and filler neck configuration before ordering. Confirm the application against the listed fitment for the exact Buick LeSabre, Oldsmobile 88, Oldsmobile LSS, Pontiac Bonneville, or Oldsmobile Regency model year. Compare the original part to FN631 before installation to ensure the neck routing and connection points match.

Quality Assurance

Spectra Premium fuel filler necks are manufactured with engineering, production, and quality control processes intended to meet or exceed original equipment performance for the listed applications.