just bought an exhaust system. It has the hole for an o2 sensor, but I don't have one. is there a plug i can buy to fill that hole? is it bad to do this?

 

I've heard about people plugging it with a bolt, without any adverse effects. I certainly wouldn't leave it open.

 

If your bike does not have an o2 sensor then yes you can plug it. If it was a new exaust it should have came with a plug. Be sure to get the shortest one you can find that gets the job done.

 

i have the exact opposite problem....mine didnt come with a hole for my o2 sensor. now im forced to drill and weld a nut on.

anyone know where to get a m12 x 1.25 nut?

i already checked home depot and advance auto parts.

thanks