HEBRAR Clamp-On Oxygen Sensor Adapter for 2-1/4 to 2-1/2 in Pipes, M18x1.5 Thread, 304 Stainless

HEBRAR's clamp-on oxygen sensor adapter is a no-weld exhaust bung that fits 2-1/4"–2-1/2" pipes, letting you add a wideband O2 sensor quickly and securely.

If you need to fit a wideband air/fuel sensor without cutting or welding your exhaust, this complete HEBRAR clamp-on adapter kit provides a corrosion-resistant 304 stainless steel bung with hardware and a gasket for a leak-minimized installation. The kit includes an adjustable bracket and an M18x1.5 threaded port that accepts most wideband O2 sensors. It’s designed for straightforward retrofit use on compatible exhaust tubing and comes with a removable spacer adapter to protect sensor tips.

How does the clamp-on design simplify installation?

The clamp-on construction eliminates the need for welding, so you can add a sensor with common garage tools. After drilling a correctly sized hole in the pipe, the bracket clamps around the exhaust and secures the threaded bung in place, reducing time and specialized labor.

• Fits 2-1/4"–2-1/2" exhaust outer diameters via adjustable bracket
• Requires only a 13/16" hole and basic hand tools
• No welding or cutting beyond the drill hole
• Includes bolts, nuts, crush washers, flanges and an exhaust gasket for assembly

Will this adapter prevent exhaust leaks around the sensor?

The kit includes sealing components and a spacer adapter to minimize leaks when installed properly. The crush washers and gasket work with the threaded bung to maintain a tight connection, while the stainless clamp keeps steady pressure on the pipe joint.

• 304 stainless steel body resists corrosion and maintains clamp force
• Crush washers and exhaust gasket included for improved sealing
• Removable spacer protects the sensor and helps establish a leak-free fit
• Proper torque on hardware prevents movement and exhaust seepage

Which wideband sensors are compatible and what thread does it use?

The adapter uses a universal M18 x 1.5 female thread that matches most aftermarket wideband O2 sensors. This common size means broad compatibility, but you should confirm your sensor’s thread spec before purchasing.

• M18 x 1.5 internal thread accepts most wideband oxygen sensors
• Includes a removable adapter spacer for tip clearance and sensor protection
• Designed for standard wideband sensor geometries rather than narrow OEM sensors
• Check sensor tip length and wiring clearance before installation

What measurements and steps are required for a correct install?

Measure your exhaust outer diameter to ensure it falls between 2-1/4" and 2-1/2" before ordering. The install process is three basic steps and can be completed with a drill, a few hand tools, and zip ties to secure the sensor wiring.

• Confirm pipe OD is within 2-1/4"–2-1/2" range
• Drill a 13/16" hole and clear metal shavings thoroughly
• Clamp the adapter bracket around the pipe and align the bung with the hole
• Thread the wideband sensor into the adapter and secure wiring with ties

Who is this for: HEBRAR’s clamp-on wideband O2 sensor adapter is aimed at DIY mechanics, tuners, and shop technicians who want a fast, non-destructive way to fit an aftermarket wideband sensor to compatible exhaust tubing. It works well for track cars, project builds, and diagnostic installs where welding is impractical or undesired. Verify pipe size and sensor thread spec before purchase to ensure a proper fit.