Well, it’s time to change the air filter in the transit again, but I have just learned that you can also add a cabin air filter to the Transit. It doesn’t come with one installed, but I have read that a cabin air filter can be installed in the small space behind the glove box.  I tried this one first, and it didn’t fit:

So, I returned the above filter and am going to try this one here:

It might cut down a bit on the air flow, but I thought I would give it a try.

Here’s a link to the engine air filter as well: