Collection: 989 - Weld bungs

989 Series Weld Bungs - Universal Weld-In Fittings for Custom Fabrication

Professional-grade weld bungs for custom exhaust, turbo, oil, and fuel system fabrication. The Speedflow 989 Series offers versatile weld-in fittings machined in Australia for precision fitment and leak-free performance.

📋 Weld Bung Installation Guide

→ Download our complete weld bung installation guide

Before you weld bungs into your tank, pan, or manifold, download our comprehensive guide featuring:

• ✅ Hole sizing chart - Exact hole sizes for all bung types
• ✅ TIG welding settings - Amperage and filler rod recommendations
• ✅ Safety procedures - Critical fuel tank welding safety
• ✅ Step-by-step installation - Professional welding technique
• ✅ Troubleshooting guide - Fix common welding issues
• ✅ Printable workshop reference - Keep it handy during fabrication

→ View the full installation guide here

What Are Weld Bungs?

Weld bungs are threaded fittings that you weld into tubing, tanks, or panels to create mounting points for sensors, fittings, or accessories. Perfect for custom fabrication where you need to add ports to exhaust systems, oil pans, fuel tanks, or turbo manifolds.

989 Series Applications

• O2 sensor bungs - M18 x 1.5 thread for oxygen sensors in custom headers and exhaust
• Temperature sensor ports - Add EGT or coolant temp sensor mounting points
• Pressure sensor bungs - Oil pressure, fuel pressure, or boost gauge installations
• Drain plugs - Custom oil pans, transmission pans, or fuel tanks
• Custom fabrication - Any application requiring threaded ports in tubing or sheet metal

Features

• CNC machined in NSW, Australia
• Available in steel, stainless steel, and aluminium
• Multiple thread sizes and styles
• Precision machined for leak-free sealing
• Designed for TIG or MIG welding

How to Install

1. Drill appropriate size hole in tubing or panel
2. Position weld bung and tack weld in place
3. Complete weld around entire circumference
4. Clean and install sensor or fitting

Shop Related Products:

• 999 Series male AN weld bungs - For AN fittings
• 990 Series female ORB weld bungs - O-ring boss fittings
• All fabrication parts - Exhaust bends, tube, and accessories
• Speedflow AN fittings - Complete fitting range

Australian Made - Perth Dispatch
Need help selecting the right weld bung for your application?