Riffraff Diesel 6637 Filter Adapter 94-03 7.3L

Now offering replacement 6637 adapters for both straight and 45 connections. We are offering this as an alternative to sourcing your own adapter. Please select the year so that you can choose between a straight or a curved adapter. 

NOTE: These are made to fit our Donaldson and Riffraff 6637 Filters. They may work on many others but we can not guarantee.