Riffraff Diesel 6637 Filter Kit

Part Number:
RDP6637

Manufacturer:

$89.00
(475 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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  • 5
    If you do anything, do this.

    Posted by Kenny on Dec 26th 2016

    This is the simplest, easiest, and cheap way to add a bit of power to your truck. I can hear it whistle more now , throttle response is way better. Mpg is about the same.

  • 5
    Quick easy installation.

    Posted by Randy N on Dec 21st 2016

    Made a difference on throttle response on my e99 ccsb.would definitely get for any 7.3. installation so simple Ray Charles could install. friendly service.

  • 5
    6637 filter kit

    Posted by Unknown on Dec 1st 2016

    Real great product

  • 4
    Good so far

    Posted by Unknown on Nov 4th 2016

    You can hear it working !!! I dig it ! Donaldson Blue filter is a good deal.My only issue is the fit.Mine is tight on the master cylinder..Early 99 7.3

  • 5
    Simple yet very effective

    Posted by Jakob on Oct 13th 2016

    Works good and looks good

  • 5
    Great Package

    Posted by Matt G. on Oct 13th 2016

    Bought for a 96' F250 with 280k miles. Quick (10-15 min) installation. Definitely hear the filter above 2500 rpm but I love the sound! Haven't really seen improvements in fuel mileage (probably my lead foot!) but seems to have better throttle response. Packaging was very efficient (bought intake boots) and relatively quick shipping since I'm down in Florida! Definitely worth the buy!

  • 5
    Such a difference!

    Posted by Gregg on Oct 1st 2016

    Without a doubt the best bang for the buck! Ten minute install and instant results. Better throttle response and less down shifting climbing hills.

  • 5
    Awesome Air Filter

    Posted by Eric on Sep 28th 2016

    I have a 96 F250 4dr, short bed with the 7.3 PS...it was owned by an older fella and only has 150K on it...love this truck...basically stock...he had a bigger tranny put in, tranny cooler with fans, inter cooler, and a couple other little things. Had a K&N filter, but that's about it. I added the filter, I want to do a 4 or 5 inch straight pipe exhaust and maybe a chip...Filter took about 15 minutes to install, Service was great, shipped fast and was very happy to see some scripture on the packing tape...I'll order the rest of my stuff through Riff Raff

  • 5
    so far works well

    Posted by Frank on Sep 23rd 2016

    I just installed and can feel a difference in the lag and breath-ability. I am completely stock except for this mod. When you let off the accelerator it does not bog down like the stock filter box. Sound is basically the same. Little better response at the foot. Definitely worth the purchase price. I did the Donaldson. I like that Riffraff puts it all together and offers great step by step instructions, but you don't really need them (very straight forward). Budget shipping was slow but on time. Thanks for the product bundle Riffraff. I will shop again.