"I used to go about a half a season and the bottom of my intake plenum would have dirt or basically just a mud consistency on the bottom and down the runners.  I was using K/N type oiled filters that need to be washed and re-oiled with dirt still getting through filter which created blow-by and rebuilds more frequently. My motor builder kept asking me if was cleaning my filter out enough. I then talked to you and tried your filter and it worked just like you said. I did not need any grease around the seal area of filter. I have used your filter for a full season and washed it multiple times throughout the season it has held up great.  I looked at my motors intake plenum at the end of this season with your filter and it was completely clean!  Your product works exceptional, it works just like you guys at R2C said it would! 

Ray Bollinger

Holley Dominator Air Filters

Holley Dominator Air Filter
Holley Dominator Air Filter w/ Optional Quick Release

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Washing Filters:

R2C filters feature a specially designed media that allows performance and efficiency to be restored to near new each time by simply using compressed air from inside out, making frequent washing unnecessary in order to restore filter performance.

R2C Black Hex Dominator filters feature a media that is fully compatible with washing.  Biodegradable cleaners such as Simple Green or other mild shop degreasers can be used. Simply place the filter in a light solution or spray the cleaner on the filter. Allow the solution to loosen the particulate and then rinse thoroughly. Shake the filter or use compressed air from the inside outward to remove residual water and allow a full day or two to dry. While the media may discolor and become light gray, filter efficiency and restriction are not affected.

* Follow the dilution and application time instructions for light cleaning as indicated by the cleaner manufacturer.



       Black Hex  logo


The World's Most powerful air filters!


    New 8.5" Diameter Filters 

  • Street Performance/Race Filter 2.50" Height
  • Street Performance/Race Filter 3.00" Height
  • Street Performance/Race Filter 4.00" Height
  • Street Performance/Race Filter 5.00" Height

     Great for dual Dominator applications!


Dominator air filter

Holley Dominator Air Filter


Small in Stature, Big in airflow!



For Dominator applications that simply don’t allow enough room for conventional sized air filters, R2C Black Hex Series filters solve the problem!


 This filter will outflow competitors 16" filters!


  • Massive airflow capability - The highest flowing media developed for dominator applications

    Flows an amazing 1160 CFM at only 3.7" Pressure Drop!
  • Direct Fit –  Urethane base and top - no base or lid Required!

  • 10" diameter

  • Available in 2", 2.5", 3", 4" and 5" heights

  • Uses standard hold-down fasteners

    Also available in a flush-mount, quick release version for additional hood clearance.



American Made Power!




DF 200 Performance/Race Filter  2.0" height - (requires a standard stud and hold down - not included)
DF 250 Performance/Race Filter  2.5" height - (requires a standard stud and hold down - not included)
DF 300 Performance/Race Filter  3.0" height -  (requires a standard stud and hold-down - not included)
DF 400  Performance/Race Filter     4.0" height -   (requires a standard stud and hold-down - not included)
DF 500 Performance/Race Filter     5.0" Height -  (Requires a standard stud and hold-down - not incl.)

     * DF200 2" Filter will require bowl vent trimming.


Add Suffix "QL-P"  Includes Polished Quick Release, Flush Mount Hold-Down

Add Suffix "QL-B"  Includes Black Quick Release, Flush Mount Hold-Down

Mounts directly to carburetor – No base or lid required.   Add suffix "QL" for flush mount Latch design (latch available separately)

Example: "DF200-QLP" includes polished, flush mount, quick release hold-down



* Measure for adequate bowl vent clearance when using a 2" filter.





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  • F: 708.366.3563
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