Watch in action

Large-Diameter Filler Cap and Weld-In Bung Kit

When your application requires high-volume fluid access, the Allstar Performance Large Filler Cap Kit is the industry standard. Featuring a generous 3-inch opening, this kit is specifically designed for fuel cells, large oil reservoirs, and custom cooling systems. The kit includes a heavy-duty steel bung for welding into your fabrication project and a beautifully polished aluminum threaded cap, ensuring both structural integrity and a premium look.

Key Features and Benefits

• 3in Large Opening: Allows for rapid filling and easy access to internal components.
• Weld-On Steel Bung: Engineered for a secure, permanent weld to custom tanks or reservoirs.
• Polished Aluminum Finish: Provides a professional, show-quality appearance.
• Secure Threading: Precision-machined threads ensure a leak-free seal under demanding conditions.

This large-diameter filler kit is an essential component for serious builders and fabricators. The 3-inch opening is particularly useful for fuel cells where quick refueling is necessary, or for oil tanks that require frequent inspection. The steel bung provides a solid foundation, ensuring your cap remains secure even under high vibration or pressure. By choosing this kit, you are investing in durability and ease of use for your custom project. Whether you are working on a drag car, off-road rig, or custom street machine, this filler cap kit delivers the performance you need. Find all your custom fabrication needs at GGCRACING.