Collection: Filler Cap and Weld Bung Assemblies

Filler Cap and Weld Bung Assemblies - Speedflow Original Design

Speedflow designed and created this legendary filler cap over 20 years ago, and it has since been copied and replicated worldwide! The original and still the best, these non-vented caps deliver reliable sealing and easy operation for custom fuel tanks, oil systems, and specialty applications.

Key Features:

• Original Speedflow Design - The authentic cap that started it all, trusted for over 20 years
• Internal O-Ring Seal - Provides secure, leak-free sealing without venting
• Hand-Tightened Lock - Reliable closure without requiring tools
• Ergonomic Finger Grips - Easy to operate, even with gloves
• Complete Assembly - Includes matching weld bung for straightforward installation
• Versatile Applications - Perfect for fuel tanks, oil fillers, coolant systems, and custom projects

Whether you're fabricating a custom fuel cell, building an oil catch can, or need a professional filler solution for any specialty application, Speedflow's original filler cap and weld bung assemblies provide the quality and reliability your build demands.

Ideal for race car fuel systems, custom oil tanks, and fabrication projects. Australian stock for fast delivery.