Filler Cap Black with Bolt-In Alum Bung Small

The ALLSTAR PERFORMANCE Filler Cap Black with Bolt-In Aluminum Bung Small (ALL 36181) is a precision-engineered fuel cell cap assembly designed for racing, off-road, and high-performance automotive applications. This bolt-on aluminum bung and cap kit features a 1.375-inch opening with black anodized aluminum construction, providing corrosion resistance and clean aesthetics in demanding environments. The threaded aluminum cap secures fuel containers with reliability, while the bolt-in design ensures a permanent, vibration-resistant installation.

The aluminum bung construction offers superior weight efficiency compared to steel alternatives, a critical consideration in motorsport where every pound matters. The black anodized finish not only provides visual cohesion with race fuel cell systems but also delivers corrosion protection in harsh environments—salt air, high humidity, and fuel exposure. The 1.375-inch opening diameter is a standard specification across major fuel cell manufacturers, ensuring compatibility with popular aftermarket tanks and OEM racing setups. Bolt-on installation eliminates the need for welding, making this assembly accessible for field installation, maintenance, and replacement at the track or in the shop.

This filler cap assembly is essential for circle track racers, off-road competitors, and performance builders who require reliable fuel containment without compromise. Drivers running quick-fueling pit stops benefit from the threaded cap's secure seal and smooth operation under pressure. The small size designation indicates this unit is optimized for space-constrained applications where compact fuel cell installations are standard—rally racing, formula vehicles, and tube-frame racers. ALLSTAR PERFORMANCE's reputation for OEM-quality racing components makes this a trusted specification component in professional and amateur racing paddocks across North America.