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Riffraff Diesel Performance Inc, Engines - Supplies, Equipment & Parts, Eagle Point, OR


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Riffraff Diesel 6637 Filter Kit

  • Late 99.5-03 Kit
  • 94-Early 99 Kit
  • Donaldson Standard Cellulose
  • Donaldson Blue® Filter
  • AFe Big Boost Filter
Part Number:

Riffraff Diesel 6637 7.3L Intake Filter Kit

This kit contains: 

- Donaldson 6637 Filter
    - Optional AFe Big Boost washable, or a Donaldson Blue® Filters
- Custom "Riffraff Diesel" Pre-filter Cover (Optional $35)
- Powder Coated Adapter Tube 
    - 94-Early 99 Uses a 45* Mandrel Bent Tube
    - Late 99-03 Uses a straight Tube
- SS T-Bolt Clamp


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Product Reviews

Showing reviews 1-10 of 284 | Next

  1. Air filter 5 Star Review

    Posted by on Jul 1st 2018

    Just finished putting this on my stock 2002. Have not driven with it yet. I feel very confident in using the Donaldson filter and for $60 for the kit it’s a very good deal. I had to trim of the bottom of the old air filter base to get everything to fit under the hood. Only took a few minutes with a cutoff tool, no big deal. Was fairly simple to install. I only wish it would have came with instructions. As usual, parts were Riffraff quality (the best) and only reaffirms my habit of shopping Riffraff first.

  2. Breathes easier 5 Star Review

    Posted by on Jun 26th 2018

    This kit allowed the engine to breathe better and from the seat it feels like a slight improvement over the stock filter. Price was reasonable. Happy with the purchase.

  3. Seems ok so far 4 Star Review

    Posted by on Jun 25th 2018

    I am looking for a some ways to improve my MPG on me F550 with a jib crane and I decided to give this a try. So far I have not seen an increase in mileage, but I have only run one take thru and it was on some really heavy hauling. The adapter tube was a little bit too long and the filter would not sit snugly in the engine bay. The hood closes down on it a bit. I think the adapter tube could be about 1 inch shorter and that would make it a better fit.

  4. The only filter that matters 5 Star Review

    Posted by on Jun 21st 2018

    I wouldn't put anything but the Donaldson filter on my truck. Don't settle for napa or any of that crap. The price is right and the filter media is the best of the best.

  5. So far so good 4 Star Review

    Posted by on Jun 19th 2018

    I've just put this filter on my 2001 excursion, and so far it seems to be a great filter. I drive dirt roads a lot and it works well. I also have the cover for it so I can keep it cleaner longer.

  6. More intake air 5 Star Review

    Posted by on Jun 18th 2018

    I received what I ordered,put it in the truck definitely notice a difference, my truck didn't flatten out when getting up on the rpm,and less smoke.

  7. Way better then stock replacement filter 5 Star Review

    Posted by on Jun 13th 2018

    Was looking for a decent filter setup without draining my bank and I just couldn’t beat 60 bucks or so for the kit really let’s my truck breathe.

  8. Very happy 5 Star Review

    Posted by on Jun 2nd 2018

    Excellent fit and quality. Exactly what I wanted and the filter cover is very nice as well!!

  9. Nice product 5 Star Review

    Posted by on May 28th 2018

    Fit great, made a huge improvement over the stock filter

  10. Great air volume 5 Star Review

    Posted by on May 22nd 2018

    I have the 38r turbo with the Riff Raff modified aluminum wheel the truck has a lot of other modifications but stock sticks I was running the ram air system made by Banks my fuel mileage was 12.77 after adding this air filter my mileage jumped up to 17 actually 16.77 noticeable difference with the throttle in my case the filter actually quieted down the air intake draw noise I'm just using the paper blue air filter. I recommend this air filter modification it's done while in my truck

Showing reviews 1-10 of 284 | Next