Sc400 custom exhaust, o2 bung thread?
 

Hey all,

In the process of installing ppe headers and complete exhaust system, but am wondering what size thread is the o2 sensor? Or is this a universal type of application? Because all the o2 bungs that i have seen dont mention anything about the thread?

Thanks
Charley

I think they're all the same thread, M18 x 1.5. Only other thing is that Toyota will sometimes use a 2 bolt mount and the sensor isn't threaded. But for the SC400, I think it's the 18mm thread. If you wanna check first, go to a parts store and see if they have an O2 sensor in stock, and measure it.

Thanks for the heads up, yeah i seen that some toyotas use a flange with 2 studs and non threaded.
Thanks for the help.
Charley

For 1uz, primary and sub o2 sensors are m18x1.5
Charley