" From SSCA Sept 2006

If you have a Racor fuel filter that uses the 2010 filter cartridge, your
engine may be in grave danger!
The older brown two micron filters have been discontinued and replaced by
another, modified version also numbered 2010. Unfortunately new version
when installed sits lower in the housing and (in mine at least) leaves the
hole in the central tube partially uncovered.
The result is obvious; this allows the fuel to bypass the cartridge and
fed directly to the engine UNFILTERED!
I have gotten around the problem by installing a spacer on the central
tube that does not allow the cartridge to go down too far. I used a piece
of thin-wall PVC pipe, cut to a length of .95 inches.

I read somewhere recently that if you contact RACOR, they have a spacer
available.

Leanne