2-1/2 Str. Filler Neck Dragster 12-Bolt Long

The 2-1/2 Str. Filler Neck Dragster 12-Bolt Long is a dedicated fuel system component engineered for high-performance drag racing applications. This filler neck assembly is purpose-built for vehicles equipped with 12-bolt differentials running extended fuel cell configurations, making it an essential upgrade for serious bracket racers and circle-track competitors. Whether you're building a dedicated dragster or converting a street machine into a weekend warrior, this component ensures reliable fuel delivery under the extreme acceleration loads and vibration inherent to drag strip competition.

Manufactured with drag racing durability in mind, the 2-1/2 Str. Filler Neck Dragster 12-Bolt Long features a robust 2-1/2 inch diameter opening engineered to accommodate high-flow fuel cell caps and quick-fill funnels for pit-stop efficiency. The extended length design positions the fuel cap opening for optimal clearance within tight engine bay configurations common to tube-frame dragsters and race-prepped vehicles. Heavy-duty construction resists fuel degradation and vibration-induced fatigue, while the long configuration integrates seamlessly with fuel cells mounted in extended positions typical of 12-bolt rear-end configurations.

This filler neck is ideal for racers who demand compatibility with standardized dragster fuel cell installations and 12-bolt differential platforms. Installation requires basic mechanical knowledge and standard hand tools, though professional welding or fabrication may be necessary depending on your specific fuel cell mounting location. The compact dimensions (6.4 x 6.3 x 6.6 inches) and lightweight 2.4 lb construction minimize parasitic weight while maximizing strength—critical factors when every fraction of a second counts on the drag strip. Verify fitment with your fuel cell manufacturer and frame design before purchase.