Riffraff Diesel 6637 Filter Kit

Part Number:
RDP6637

Manufacturer:

$89.00

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)
- Powder Coated Adapter Tube 
    - 94-Early 99 Uses a 45* Mandrel Bent Tube
    - Late 99-03 Uses a straight Tube
- SS T-Bolt Clamp

install.jpg

1994-Early 1999 Powerstroke production date 12-7-1998 and before
Late 1999-2003 Powerstroke production date 12-7-1998 and after
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  • 5
    6637 kit with Donaldson blue filter

    Posted by DJ on Jul 23rd 2022

    Quick easy install, parts appear to be of good quality. I will probably get the stand-off mount to get the filter off the inner fender. I do have a slight drone at low rpm/light throttle. After a couple days I don’t really notice it unless I focus on it so not that bad. Great product though as far as smiles to dollars go. Made it so I could hear my turbo with stock exhaust, with a slightly noticeable increase in power/throttle response.

  • 5
    6637 filter kit

    Posted by Mark on May 14th 2022

    The process took about 15 min's, I am very pleased with the performance. Just the filter kit alone really improved the way the old 7.3 responds, now the engine can breath.
    Thanks Riffraff for a quality product at a great price. I recommend the filter kit and the prompt service

  • 5
    Cleaner install

    Posted by Chris on May 11th 2022

    You could install with a straight piece of 4” tubing like in a super duty, but because of the orientation for the OBS, this gets the filter to fit nicely and looks more professional.

  • 5
    Fit perfectly

    Posted by Michael on May 4th 2022

    Flows more than the stock airbox and freed’ up some room in the bay

  • 5
    Air filter upgrade

    Posted by Kadin on Apr 25th 2022

    I had the cheap amazon china one and the filter sucked as well as the couplers and clamps. This is the best kit for your money. The turbo is so much more pronounced but not obnoxious like my amazon one. Compared to the outrageous prices of K&N and other brands this was the best choice in my opinion. Very happy with riff raff products!

  • 5
    Great fit!

    Posted by Daniel on Apr 16th 2022

    Worked well and makes the engine look cleaner!

  • 5
    Just as described, fit perfectly

    Posted by Rq on Mar 28th 2022

    None

  • 5
    Air filter 6657

    Posted by Buddy on Mar 1st 2022

    Added a little boost but the turbo is louder with more air flow to the turbo. Next I will replace the turbine wheel.

  • 5
    6637 Filter Kit

    Posted by Darren D. on Feb 27th 2022

    Easy Peasy. Intstalled the whole kit and cleaned my captiain's side inner fender and valve cover in about 35 mins. Not all the increased intake sound everyone said it would make. But I know its a significant increase in air intake to the turbo -measured against the stock air box. If you don't think you can do it ... think again, because it's simple. Buy it now if you have the stock airbox on your 2000 7.3. Thanks Clay!!