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.
6 Reviews Hide Reviews Show Reviews
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Riff Raff 6637 Filter Adapter
My 1995 needed the elbow adapter. It fit nicely into the old flexible hose from the factory and the new filter. I had to change some things where the old air box was located to accomodate the new filter. So far, things seem to be working OK.
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Filter Adapter
This is the least expensive and best way to install your 6637 filter. Way better than the PVC pipe I was using.
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6637 Filter adapter
Good quality and fitment
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Filter adapter tube
Easy to install, working great
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adapted
fit perfect
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Filter adapter
Fits good works good
