Donaldson Blue® 6637 Filter

Part Number:
RDPFILTER-BLUE

Manufacturer:

$88.55
$88.55
$59.16
(You save $29.39 )

Donaldson Blue® 6637 Intake Filter for Ford 7.3L 94-03

Donaldson Blue® air filters with Ultra-Web® nanofiber technology protect engines by providing better initial and overall efficiency compared to conventional cellulose media. Donaldson invented air filters for heavy-duty diesel engines over 100 years ago and were the first to develop nanofiber air filter media for the diesel engines, with more than 20 years of proven performance. 

Benefits
  • Longer Engine Life - Donaldson Blue™ air filters provided better engine protection by allowing much less contaminant to pass through than cellulose air filters but still maintaing a higher flow rate
  • Longer Filter Life - Smaller interfiber spaces of Ultra-Web® nanofiber technology hold more submicron contaminant than conventional filters with cellulose media, delivering longer filter life
  • Increased Flow - Utilizing the nanofiber Ultra-Web® media has allowed for a 37% increase in flow over the standard 6637 cellulose filter. It has also been tested to flow over 1300 CFM+.
Media Type
  • Ultra-Web® Nanofiber Technology -- Exclusively in Donaldson Blue air filters
    • Engineered to perform in extreme temperature and humidity conditions, unlike ordinary nanofibers and cellulose which aren't hydrophobic
    • Proven in the real world – used in diesel engines for nearly two decades
    • On-road applications are guaranteed to go twice the distance compared to standard cellulose filters

We suggest buying them in quantities of 2 as your shipping won't increase much and you will save money.

100% Made In The USA

NOTE: This filter is disposable and is NOT washable. 

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  • 5
    Filter Review.

    Posted by Adam Collier on Feb 1st 2023

    I love this filter. It looks good, and I can tell the difference in air intake from previous Spectre filter. Would recommend.

  • 5
    Air cleaner

    Posted by Dan Carlson on Jan 30th 2023

    Great product!

  • 5
    Donaldson Blue 6637 Filter

    Posted by C Smith on Nov 20th 2022

    This the replacement for the 6637 kit , as recommended, bought 2 to save on shipping and time.

  • 4
    Air filter

    Posted by Paul on Nov 9th 2022

    So far a great product my turbo sounds alot happier when I put this filter on with the banks turbo upgrade kit, and my oil is definitely cleaner between oil changes. Only thing I am curious about is how this open concept without a heat shield effects the truck, if it takes in more hot air form the engine area or not. If anyone has any info about it would love to know

  • 5
    Hear the Flow!

    Posted by Unknown on Sep 5th 2022

    You can hear the difference when changing from the standard WIX 6637 to a Donaldson blue. Not to mention less smoke and better throttle response. I recommend this over any of the other options or brands.

  • 5
    Great Improvement

    Posted by Jack on Aug 16th 2022

    After years of running a standard 6637 I saw this and decided to try it. What a difference! Way more flow, less smoke and better mileage.

  • 5
    6637 Filter on Titan XD V8 5.0L Cummins

    Posted by Lawson Holt on Jul 22nd 2022

    I have a 2016 Nissan Titan XD Diesel with a 5.0L Cummins. I ran a S&B cold air intake for the last 6 years. The 6637 filter puts them to shame. I had to do a lot of modifications to make this filter work on my truck, but it fixed a lot of my issues. I have more power, I get a ton of air flow now. Truck performance is up. My MPG went up 3mpg in the city. It also took away a lot of the lag that you experience with the Titan XD Dieael. I can actually hear my turbo now when I'm going down the road. Overall the best filter I have ever purchased. I will continue to use this filter from here on out. I was blown away is an understatement. Also want to give a shout out to Riffraff Diesel. They were prompt on getting my order to me quickly. They also provided updated text on shipping details every step of the way. Great customer service! The free sticker was also a plus! Overall very pleased!

  • 5
    Good shit

    Posted by Layton on Jul 13th 2022

    Works good. Good shit

  • 5
    Donaldson Blue 6637

    Posted by Chris Brady on Jul 6th 2022

    Major improvement over the standard 6637. Much better air flow, I can definitely tell the difference in better throtte response. I even picked up an extra mile per gallon