What's this pipe?

[AirGordon]

[Greenmamba]

Power steering fluid cooler. Should have fins attached to enhance cooling effect

[Jamina]

As above although it doesn't have fins, this is how it should look and is an OEM part.

I have seen people delete these but personally I just re-coated mine in temp proof paint so it doesn't stand out behind the grille.

I think people delete to make room for hella horns so that they are central rather than both being on the n/s