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K&N Oval Air Filter fits DK OUTLAW HiFlow 636v A/C's

Availability: In stock
Item #: DK-KN-RC-3680-AF
Manufacturer: K&N
Manufacturer's Product Number: RC-3680


Harley Davidson DK Custom AEM DRYFLOW K&N  Performance Intake Replacement Air Filter Outlaw Air Cleaner System EBS Roadster  High Flow M-8 Milwaukee-Eight Softail Twin Cam Dyna 72 48 Big Twin Evo Nightster Iron Stage I Ness Big Sucker 587 425 606 Pro Bill

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K&N Replacement

Standard Tapered Oval

Air Filter Element


DK Custom Outlaw Hi-Flow 636v Air Cleaners

Also Fits a Variety of other A/C Systems

K&N Oval Air Filter fits DK OUTLAW HiFlow 636v A/C's

MADE in The USA!


  • Genuine K&N Air Filter
  • K&N Million-Mile Limited Warranty
  • Base Outside Length: 4.5"
  • Base Outside Width: 3.75"
  • Flange Inside Diameter: 2.438"
  • Overall length: 6"
  • Top Outside Length: 3"
  • Top Outside Width: 2"
  • Shape: Oval Tapered
  • End Cap: Chrome
  • Made in The USA!


Your K&N Air Filter that came with your OUTLAW 636v HiFlow Air Cleaner has the K&N Million-Mile Limited Warranty.  

With periodic cleaning and oiling it will be the last filter your bike will need.

HOWEVER, many riders like to have a second filter to rotate so while one is drying after being cleaned, the other can be on the bike.

Also, the Million-Mile Warranty does not cover if the filter is physically damaged by road debris or some other abuse.

This filter fits your OUTLAW HiFlow 636v Air Cleaner, it also fits a variety of other A/C systems.

This is the the default K&N Oval filter than comes with the 636v.

How To Clean & Recharge Filter Element Video Below

Customer Reviews

Great filter Review by Drew
I originally bought my 636 I take with the large round filter, this one is a little more proportional to the size of a dyna. And it looks great. (Posted on 3/21/2022)
RC 3680 filter Review by Corey A.
Its a true Stage 1 filter! And beyond. Love the new look of my Sportster with this filter and the 636v intake system. DK Customs with K&N...can't go wrong! Fast ship. Very easy install. (Posted on 6/9/2020)

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