I picked up an EMPI 9000 Off-road Air Cleaner from Air Cooled Vintage Works to put on the Baja because I live a few miles up a dirt road and my air filter looks dirty all the time. Part of this means removing the oil breather hose and replacing with a latest rage oil breather.
The rubber hose to mount the adapter was tricky to fit with the hose clamp, but a little windex made it easier.
Look at the size difference!