I found this and am wondering if anyone has any info on these filters, they sya they make one for the CD4E, so I am VERY curious how they do that....

Looks like an add-on internal filter, can anyone confirm this?

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Metal Thunder Dragon, AKA Matthew Blakeley Electronics Tech '99 Mercury Mystique LS - Loaded '96 Ford Explorer Sport - Standard '90 Ford Taurus L - Rusting silently in the back Iraq-Land of the lost!