Drag Specialties Weld-In O2 Sensor Bung – Honda Grom, Monkey, Z125 & More

Drag Specialties Weld-In O2 Sensor Bung – Universal Exhaust Fitting

Add an oxygen sensor port to any custom or aftermarket exhaust system with the Drag Specialties Weld-In O2 Sensor Bung. Made in the USA, this weld-in fitting is the clean, professional solution for builders and tuners who need to integrate an O2 sensor into a pipe that doesn’t have one — whether you’re running a standalone ECU, a wideband controller, or need to retain emissions compliance on a custom exhaust build.

Features

• Weld-In Design – Permanently mounts to any exhaust pipe for a clean, leak-free O2 sensor installation
• Universal Fitment – Compatible with standard O2 sensor thread sizes used across most motorcycle and mini bike exhaust systems
• Made in the USA – Quality construction from Drag Specialties, a trusted name in motorcycle hardware

Common Uses

• Custom exhaust builds requiring O2 sensor integration
• Aftermarket pipe installations on fuel-injected mini bikes
• Wideband AFR controller setups
• ECU tuning builds (e.g., aRacer, Bazzaz, Power Commander)

Compatibility

• Honda Grom – All Years (OG, SF, JC92, 2025+)
• Honda Monkey 125 (1st Gen & 2022+)
• Kawasaki Z125 Pro
• Kawasaki KLX110
• Honda CRF110 (2019+)
• TNT135 and other mini bike platforms with compatible exhaust tubing