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 $29)
- Filter Adapter Tube
- 94-Early 99 Uses a 45* Tube
- Late 99-03 Uses a straight Tube
- SS T-Bolt Clamp
Late 1999-2003 Powerstroke production date 12-7-1998 and after
468 Reviews Hide Reviews Show Reviews
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6637 filter kit
Fit like a dream on my 1996 f250 7.3 desiel
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Huge improvement.
Takes some cutting to get it to fit. At least doubles the size of the filter.
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Intake Kit
Easy install, just removed the stock box and dropped this in. Way more air flow, you can really hear the turbo breathing now.
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Seems to be well built
EGT’s drop a lot faster when at idle. Different then my old cold air intake so still learning EGT threshold while towing.
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Donaldson Blue 6637 kit
It’s ok. Little pricey for the band clamp and metal tube. Hood on truck won’t close all the way down flush as filter diameter is too big. It will close just not flush. Nice piece though and seems to help.
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Big Improvement
Had a K&N that was in there when i got the vehicle. Put this in and wow , Huge Improvement. Plus it’s easy to get in and out. Looks good as well. Very happy.
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Quality
Filter and cover are nice, but would've been nice to have more then 1 hose clamp I had to order the other hose clamp elsewhere.
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6637 Filter Kit
Perfect fit and excellent function! Top quality materials. Riffraff for the win once again.
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Big filter kit OBS 7.3
Looks good and breaths real easy I deal it’s way cheaper than the fancy high flow intake systems with the same or better flow for less$ . Shipping was fast riffraff always delivers fast with great products. Thanks