Aeromotive fuel filters: how to tell them apart?

[parsonsj]

I've got two Aeromotive fuel filters on my car; one before the pump and one after.



Aeromotive says to run a 100 micron filter (Aeromotive pn 12304) before the pump and a 10 micron filter (pn 12301) after the pump. It turns out that a common mistake is to use a 10 micron filter before the pump which can lead to fuel pump vapor lock.

Today, I had the vapor lock problem (again, and it was the same thing that happened to me in Pigeon Forge). I really can't remember which filter I put where... and I can't tell which is which by looking at them.

Anybody know how to tell them apart without taking them apart?

jp