Filler Cap Red with Weld-In Steel Bung Small

The ALLSTAR PERFORMANCE Filler Cap Red with Weld-In Steel Bung Small is a precision fuel cell component designed for custom fuel tank installations in race cars, hot rods, and performance vehicles. This weld-on bung and cap kit provides a secure, sealed fill point with a 1.375-inch opening, combining a steel welded bung base with an aluminum threaded cap finished in bright red anodize for corrosion resistance and visibility.

The steel bung is engineered for permanent installation via welding to the fuel tank wall, creating a rigid foundation that withstands fuel sloshing, vibration, and pressure cycling without flex or failure. The aluminum threaded cap offers quick hand-removal for refueling while maintaining a tight seal between fill cycles. The red anodized finish resists corrosion from fuel vapors and moisture, making it suitable for both street and competition applications. The 1.375-inch opening diameter balances fuel flow capacity with compact mounting footprint, ideal for tight engine bay layouts where standard fuel doors are impractical or undesirable.

This bung and cap kit is essential for fabricators building custom fuel systems, whether upgrading from factory tanks to aluminum cells, creating dedicated fuel cells for circle track racing, or integrating fuel systems into full restorations. The weld-on design eliminates the need for threaded bungs, reducing potential leak points and allowing tank builders to position the filler anywhere on the tank surface. Serious racers and street rodders rely on ALLSTAR PERFORMANCE components for repeatability and durability across multiple build cycles.