Riffraff Diesel 6637 Dry Washable Filter
Using proprietary blue dry synthetic media, our 6637 Dry Washable filter flows 10.53% more air than Donaldson's filter all while maintaining a 99.98% efficiency using the ISO A2 Fine Dust test criteria.
100% Made in the USA
Our Dry Filtration, Washable Filter can easily be rinsed off with a garden hose, lightly blown dry with shop air and allowed to air dry up to 5 times all while increasing the useful life of your filter and keeping the cost low.
11 Reviews Hide Reviews Show Reviews
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Way better than Napa 6637
Just replaced my Wix 6637 and huge difference. More power and lower EGTs. Hard to believe the wix 6637 was so restrictive. MPG is higher too. 10/10
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6637 DRY WASHABLE FILTER
After running the 6637 filters for years I figured I would give this one a try. I can honestly say it is the only one I run now. Less smoke, and way better deal since I can just wash it out.
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6637 Filter
Perfect fit. Great product. American Made! Christian based Company! Its a win win! USA
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Works
Unexpected result is the engine is a bit quieter at idle. Have been running the blue 6637 for a few years now and didn't expect much improvement but this one does seem to keep the engine happier. Washable is a nice plus.
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6637 Filter
Great replacement for my Napa wix filter. Way better value even before I wash it out and reuse it.
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Good replacement
The washable 6637 dry filter is a good replacement for the standard paper filter. I like the fact that it can be washed 5 times saving money on a replacement every 10K.
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6637 DRY WASHABLE FILTER
Probably one of the best upgrades I have done. I now have less smoke and more airflow. Just an added bonus that it can be cleaned.
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Washable 6637 Filter
This is the best 6637 filter for the money. Paid for itself the first time I washed it.
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Riffraff Blue Filter
Already paid for itself, have washed it from all the dust on the farm. I am happy to be able to buy a few less filters every year.
