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  • Saddled 304SS O2 Bung M18x1.5
  • Saddled 304SS O2 Bung M18x1.5
  • Saddled 304SS O2 Bung M18x1.5
  • Saddled 304SS O2 Bung M18x1.5
  • Saddled 304SS O2 Bung M18x1.5
  • Saddled 304SS O2 Bung M18x1.5

Saddled 304SS O2 Bung M18x1.5

$7.00
$7.00
Shipping calculated at checkout.

Saddled 304SS O2 Bung — M18x1.5

Get your oxygen sensor sitting exactly where it needs to be. This saddled O2 bung is built for proper fitment on curved exhaust tubing, not the flat-bottom compromises that dominate most parts bins.

Features & Benefits

Saddled Profile for a Clean, Flush Weld

The contoured saddle base conforms to the curve of your exhaust pipe, giving you full contact around the weld seam before you ever strike an arc. The result is a stronger, cleaner weld with no awkward gaps — a detail flat bungs simply can't match.

304 Stainless Steel Construction

Made from 304SS, this bung handles the heat and corrosion demands of a performance or custom exhaust build. 304 stainless is a proven material for exhaust fabrication — not a mystery alloy, not a generic stainless with no spec behind it.

M18x1.5 Thread — Industry-Standard Fitment

M18x1.5 is the universal thread pitch for the vast majority of O2 sensors, wideband sensors, and lambda sensors on the market. If you're running a standard narrowband O2, a wideband controller, or a replacement OEM sensor, this bung threads right in.

Versatile Across Builds

Whether you're fabricating a custom exhaust, building a turbo system, or adding a wideband bung to an existing pipe, this fits naturally into any build — gas or diesel, street or track. Weld it to mild steel or stainless tubing using standard TIG or MIG technique.

Stocked in Canada, Ships Across North America

Sourced and stocked by BSI Inc., this bung ships fast to customers throughout Canada and the United States — no waiting on cross-border delays for a part you need to finish the job.

Stop settling for flat bungs that don't sit flush — weld this in right the first time and move on to the fun part of the build.

FAQ

What is the advantage of a saddled O2 bung?

A saddled O2 bung has a contoured base that conforms to curved exhaust tubing, helping create full contact around the weld seam for a cleaner, stronger weld with fewer awkward gaps.

What thread size does this O2 bung use?

This bung uses an M18x1.5 thread, which is the universal thread pitch for the vast majority of O2 sensors, wideband sensors, and lambda sensors.

What material is this bung made from?

This bung is made from 304 stainless steel, a proven material for exhaust fabrication.

Can this bung be used on mild steel or stainless tubing?

Yes. It can be welded to mild steel or stainless tubing using standard TIG or MIG technique.

Where does this saddled O2 bung ship from?

This bung is sourced and stocked by BSI Inc. in Canada and ships to customers throughout Canada and the United States.