Does anybody know what this bung is for on the factory exhaust? My car came with straight pipes on it, so I have no idea what this is for. I looked under the car and could not find anything.

 

Supposedly used to check EGT for EU smog or factory testing. (forget which one it was...)

 

thank you, so do i plug it or leave it open?

 

Plug it, should have a screw in it already.

RD

 

Thanks, Does anybody know the size of the plug? The aftermarket exhaust that was on there when I bought it did not have it. I called Porsche in Oklahoma City, and they didn't show a part number or anything. Thanks in advance.

 

That is where the O2 sensors screw in. Look up posts by me KellyT where I did a DIY on replacing my OEM exhaust for an RPI. It will explain it all.

 

This is on the opposite side of the 02 sensor bungs.