Has anyone ever self tapped their own o2 Sensor hole on the exhaust before? For some odd reason, my dc header and rsr full exhaust system doesn't have a o2 sensor hole for the o2 sensor to be screwed in. Any thoughts? advices? products out there that someone bought and tried to self tap it theirselve.

Thanks

 

Take it to a muffler shop and get a 02 bung welded on. Its a Common problem and cheap to fix.