Riffraff Diesel 6637 Filter Kit

Part Number:
RDP6637

Manufacturer:

$89.00
(474 reviews) Write a Review
99.5-03 Donaldson White 6637 Filter Kit

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

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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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474 Reviews Hide Reviews Show Reviews

  • 5
    6637 kit with Blue filter

    Posted by allen beauvais on Mar 30th 2021

    Great Kit! I can't believe how much more I can hear my turbo. This is a must have if you have upgraded your turbo wheel and are still using the stock box. Boost spools is much better and EGT down a pretty noticeable amount!

  • 5
    6337 kit

    Posted by Nick on Mar 28th 2021

    Works great. Bought the optional v10 battery tray to help with cleaning it up and fitting the filter better. Didn't notice a sound difference except for shifts. As I did not want it louder in cab. Notice a small performance gain as of 1 week pulling a 16 ft enclosed trailer. Will be back for more riff raff for my 7.3

  • 5
    Great Product!

    Posted by Tommy on Mar 21st 2021

    Looks great, fits great!

  • 5
    RIFFRAFF DIESEL 6637 FILTER KIT

    Posted by Ian on Mar 17th 2021

    I am really enjoying the RIFFRAFF DIESEL 6637 FILTER KIT.
    I can feel a small performance boost and definitely hear the turbo whistle more.

  • 5
    Perfect

    Posted by Jazmine Reann on Mar 16th 2021

    Took longer to remove the stock air cleaner than installing this kit. Fit perfectly

  • 5
    Install

    Posted by Scott on Mar 13th 2021

    Install was super easy. I had to order a 45 degree elbow to make it fit with out putting pressure on any other under the hood component.

  • 5
    Good filter

    Posted by Steve on Mar 7th 2021

    No complaints about the filter, bit of a pain in the ass to drive the adapter tube into it, but nothing a deadbolt doest solve.

  • 5
    6637 filter kit

    Posted by Jack on Mar 6th 2021

    Super EZ install

  • 5
    6637 Filter Kit

    Posted by Josh H on Feb 28th 2021

    Highly recommend. Much better turbo spool and performance. Took longer to get the stock air box out than it did to install the filter. 10 minutes total.