M18 304SS Flanged Saddle Bung
Get a clean, secure O2 sensor mount without the headache. This m18 304ss flanged saddle bung from BSI Inc. gives fabricators a weld-ready foundation that fits the way real exhaust tubing is shaped.
Why Builders Choose This Bung
M18 × 1.5 Thread — The Universal O2 Sensor Standard
Fits narrowband and wideband lambda sensors right out of the box. No adapters, no hunting for oddball thread sizes.
Flanged Saddle Design
Unlike a plain round bung that bridges a curved pipe and leaves gaps, the saddle profile contours to your tubing for full, consistent weld contact. The result is a stronger weld, less chance of exhaust leaks, and a cleaner finished look.
304 Stainless Steel Construction
304SS holds up to the heat cycles and corrosive exhaust gases found in everything from turbocharged builds to high-output performance applications. It's a step up from mild steel bungs that rust out and seize sensors over time.
Weld-On Simplicity
Drill your hole, drop the bung in place, and weld. The flanged base gives you a stable platform to tack before you run your final bead — no jigs, no fuss.
Stocked in Canada — Ships Fast Across North America
Sourced and shipped domestically so Canadian builders aren't waiting weeks on cross-border freight. U.S. customers get the same quality hardware without the guesswork of offshore sourcing.
Whether you're fabbing a one-off exhaust, relocating a sensor, or building out a turbo manifold, the BSI Inc. flanged saddle bung is the no-compromise weld bung for builders who care about doing it right.
FAQ
What sensor thread does this bung use?
This bung uses an M18 × 1.5 thread, the universal O2 sensor standard for narrowband and wideband lambda sensors.
Why choose a flanged saddle bung instead of a plain round bung?
The saddle profile contours to curved exhaust tubing for full, consistent weld contact, helping create a stronger weld, reduce the chance of exhaust leaks, and deliver a cleaner finished look.
What material is this bung made from?
It is made from 304 stainless steel, which holds up to heat cycles and corrosive exhaust gases in turbocharged builds and high-output performance applications.
How is the bung installed?
Drill your hole, place the bung, and weld it on. The flanged base provides a stable platform for tacking before the final bead.
Where does this bung ship from?
It is stocked in Canada and ships across North America.