Thanks a lot guys!!!

Hello,

I bought a jaguar IRS for my kitcar.
I have a question about the little black pipe in the picture below (within the red circle in the next post).

Mine doesn't have that. I only have the hole with the 90° bend screwed in, but not the black extension or the yellow cap. My questions:
1. What is this thing supposed to do? Venting?
2. Can I leave it like that? Or should I extend it and put a small filter on it?

Thanks a lot,

Q