Well Im about to buy a test pipe for my 9 mr. Question is do I need to buy the one with the 02 bung in it? I know you can delete that o2 in ecuflash so should I just get the one with the bung in it and just plug it when I delete it or can I just not ever put the o2 sensor in it. Are there any cons to this?

 

You can put a WB sensor in it, instead of the DP or leave it as a option down the road.

 

Just get one with the o2, put your factory o2 in there, no reason not to. get an o2 defouler they are $10 to avoid the check engine light. I wouldn't put a wideband all the way back there.

 

same as above buy the o2 simulator

 

Check out the ultimate racing test pipe, it has a mechanical fix built into it so that it does not throw a CEL. Ive had mine for a year now and haven't threw a CEL yet.

 

Get one with a bung, if you're using a Tephra v7 Rom there is an o2 simulator built in. That way you don't have to cut any wires.

 

Thanks everyone. Got the stm with the bung.