I bought a new oil filter and diesel air cleaner while I was ordering parts. I hate the stock air cleaner on the early Urals. It's next to impossible to remove the air filter without removing the gas tank. The diesel air cleaner will need to be modified to fit, but it will make filter changes easier. The filter is like this one: but I ordered from a different source that was cheaper. It's obvious that Ural thought the old filter housing was a problem as they changed the design of the stock housing a while ago.