Riffraff Diesel 6637 7.3L Intake Filter Kit
This kit contains:
- Riffraff Diesel 6637 Filter
- Optional AFe Big Boost washable, or a Donaldson Blue® Filters
- Custom "Riffraff Diesel" Pre-filter Cover (Optional $29)
- Filter Adapter Tube
- 94-Early 99 Uses a 45* Tube
- Late 99-03 Uses a straight Tube
- SS T-Bolt Clamp

Late 1999-2003 Powerstroke production date 12-7-1998 and after
475 Reviews Hide Reviews Show Reviews
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DIY airfilter
What a GREAT product. I was looking all over for a DIY airfilter system. The filter has expanded metal inside and out so there is no worry of collapse. I choose to get the slip on prefilter which has the Riff Raft logo and REALLY dresses the filter nicely. Everything fit perfectly and was super easy to install. I did get an extra filter to save on shipping. Overall DEFINITELY well worth the money......
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Great Set Up!
Easy to install. Gave the Excursion better throttle response and maybe 1mpg more. Great mod! It definitely makes the engine BREATH a lot better. If you are thinking about it...Just do it!
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Great product, fast shipping.
Everything you need to get the job done in a click of a button. Shipped out same day.
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AFE UPGRADED FILTER
This is a great kit for the money and fits in the engine bay nicely. Very easy to install. Get the cover for it too and it adds a nice touch to the overall look. You will definitely here it when under boost. Driving and cruising with no load and you can't even tell its there.
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Optimum flow with superior filtration
This intake might be one of the best on the market, it gives optimum air flow but doesn't compromise filtration. The Donaldson 6637 filter does a spectacular job at filtering out any dirt in the incoming air of your vehicle pair that with the riffraff filter cover and there's no way dirt or water can enter into your motor thru the intake. Plus it makes it look amazing under the hood, and sound amazing while your driving.
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Cost effective intake
Great intake would definitly recommend
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Best performance mod yet
Did a lot a research on mods on a budget and found that this mod was by far the most recommended. Glad I did. Great pedal response, instant performance boost. Not sure of the fuel savings... can't keep my foot out of it. Easy to install.
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Great product
Fit great, well worth the money
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Perfect upgrade for the price
I have purchased this kit two times now for two trucks and am still very happy with them. Not a huge power adder but definitely makes a difference over stock. My 7.3's drive so much better with improved throttle response and merging on the highway is much easier. Well worth the money.






