Hey guys....I have headers and exhaust and the exhaust has a hole for the o2 sensor to be inserted but since I switched out the headers and eliminated the cat, there is no longer an o2. So what's the best way to plug up that hole?

 

put a dead sensor in or find something at homedepot to screw in it... shouldnt be that difficult.

 

weld in a quarter (yes, ive seen it done before)