That's your EGR with a vacuum hose attached to the 4 port emission block.
The vacuum hose is hard to find and why more than likely someone use a short piece of rubber hose to couple the 2 ends together.
The original plastic vacuum line has a bulge/bell at the end that fits inside the rubber connectors to keep it from pulling out of the rubber connector.
If you don't have your smog equipment from the smog pump back then you can just cap/plug the other vacuum off leaving the EGR line still hooked up to a vacuum source.
The vacuum hose is hard to find and why more than likely someone use a short piece of rubber hose to couple the 2 ends together.
The original plastic vacuum line has a bulge/bell at the end that fits inside the rubber connectors to keep it from pulling out of the rubber connector.
If you don't have your smog equipment from the smog pump back then you can just cap/plug the other vacuum off leaving the EGR line still hooked up to a vacuum source.
