What is this part used for?

This part is a weld-in boss designed to create a mounting point for an oxygen sensor in custom exhaust systems. It's commonly used when fabricating headers, downpipes, or exhaust pipes where a factory sensor location isn't present or needs to be modified.

What material is this O2 boss made from?

The O2 boss is constructed from stainless steel. This material is chosen for its strength and resistance to corrosion, which is important for components exposed to exhaust gases and high temperatures.

What size threads does this boss have?

The boss features standard 18 x 1.5mm threads. This is the common thread size for most factory and aftermarket oxygen sensors, ensuring broad compatibility.

Magnaflow O2 Sensor Plug Hex Flange 10044

Name: Magnaflow Plug Hex Flange O2 Boss (20-Pk)
Brand: Magnaflow
Price: 158.26 USD
Availability: InStock

Magnaflow Plug Hex Flange O2 Boss (20-Pk)

$158.26

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Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Magnaflow O2 Sensor Plug Hex Flange (20-Pk). Stainless steel boss for custom exhaust fabrication. Universal fit.

Key Features

Includes 20 hex flanged O2 sensor bosses.
Made from durable stainless steel for corrosion resistance.
Features 18 x 1.5mm threads, compatible with most oxygen sensors.
Designed for welding into custom exhaust pipes, downpipes, and headers.
Universal fit for various fabrication projects.
Manufactured using precise robotic techniques.

These are universal fit parts intended for custom fabrication and do not have specific vehicle fitment.

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Product Details

When you're fabricating a custom exhaust system, whether it's for a performance build or just a repair, you'll often need a place to install an oxygen sensor. This 20-pack of Magnaflow Hex Flanged O2 Bosses gives you the mounting points you need. They are designed to be welded into your exhaust pipes, downpipes, or headers, providing a clean and secure spot for your sensor.

These bosses are made from stainless steel, which is a solid choice for exhaust components because it holds up well against corrosion and the high temperatures found in exhaust systems. The threads are a standard 18 x 1.5mm, which is what most factory and aftermarket oxygen sensors use, making them a versatile option for many projects. Magnaflow uses precise manufacturing techniques to ensure these bosses are well-made and easy to work with during fabrication.

Having a pack of 20 means you'll have plenty on hand for multiple projects or if you need to install more than one sensor on a single exhaust system. They are a universal fit, so you can adapt them to almost any exhaust setup you're building.