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Mystery part?
No, it's not the lump of steel attached to the frame! I was under the truck today changing out my passenger side O2 sensor (bank 2 sensor 1, changed out bank 1 sensor 1 a few weeks ago-got a code for the other side) and saw this thing. It looks like a small tube (3/8" ish) sticking out and bending 90 degrees from a stud in the block with a nut holding it.
It doesn't look like there was ever anything attached to this but that confuses me even more...
Sorry for the odd angle of the photo. You can see the new O2 sensor to give you a reference point.
Any thoughts??
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