Help Me To Identify What This Is

2017 6.7L Cummins.

What is the 6-inch hard metal line that screws into the exhaust manifold center and goes vertical to a sensor with a heat wrap around the sensor?

Possibly Exhaust Back Pressure sensor.

Do I remove or reuse this sensor?

Thanks for this great forum.

Yes, sir, it's the exhaust backpressure.

It's for the truck computer.

What are you trying to do?

If your adding a gauge, I've seen where ppl tie into the wires on the stock back pressure sensor.