DK Custom Products

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Text: 662.420.4891
Email: [email protected]

Outlaw HiFlow 636v Air Cleaner System Harley Milwaukee-Eight

Availability: In stock
Item #: DK-AC-636V-M8-CS
Manufacturer: DK Custom Products

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Outlaw HiFlow 636v Air Cleaner System Harley Milwaukee-Eight Complete M8 NewGen 636 TBW Cable throttle Throttle by Wire K&N Stage I Venturi Velocity Effect Clean Air Forward Facing

Outlaw HiFlow 636v

High performance

Air Cleaner System



~High Performance Air Cleaner~

~NewGen 636v~

  ~Optional Rain Sock~



MADE in The USA!

DK Custom Products



  • Genuine K&N Air Filter (Choice of 5 different sizes/shapes)
  • Forward Facing - improved leg clearance 
  • Designed Specifically for the M8 Engine
  • Black Powdercoat Finish
  • Your Choice of External Breathers (NO oil air in engine)
  • Patent Pending NewGen Design Increases Air Velocity
  • Filter element is out in the air for Cold Air Intake
  • Harley heavy Breather Covers will Fit with the Round Filter
  • A  True Stage l Air Cleaner
  • E-Z Step-by-Instructions Included
  • Made in The USA!


This High Performance Air Cleaner utilizes the Venturi Effect to Increase the Velocity of the air entering your throttle body/carb via a Patent Pending Forward Facing Intake Tube.  

This results in a significant increase in power across the entire RPM band when compared to other aftermarket air cleaners.


This System is TURN-KEY.  It comes with everything you need to replace the restrictive stock air cleaner. 


There are 5 different choices of K&N Air Filter Elements-

1.  Oval with Chrome endcap

2.  Large Oval with Black endcap

3.  Round with Chrome endcap

4.  Shorty with Black endcap (This 250 CFM filter is specifically designed for bikes with fairing lowers that have glove boxes, speakers or radiators.)

5.  DryFlow Round Filter Element 5" Diameter by 5" Length

(you can see all the details/specs on each of these filters at this LINK)



Included:  Your Choice of Brass, Black or Polished Aluminum Breathers.  Or you can choose one of the Hose & Filter Breather Systems for venting- The Traditional or the Discrete.  To see full details on ALL these choices Click HERE.


When choosing between the 6 Breather systems, it is helpful to know-

1.  All three Breather Bolt function the same, it is just a matter of which color you prefer.

2.  All three of the Hose and Filter Breathers function the same with the Outlaw Air Cleaners, it is a matter of which system you like the looks of the best.

 The Transformer™ is the Ultimate External Breather System, that Doubles as a Support Bracket and can be Transformed into an EPA (Emissions) Compliant System. It fits all Outlaw Air Cleaners. 


The ingeniously simple (patent pending) design that produces the Venturi Effect is the shape & length of the Intake Tube with the enlarged mouth.  This gives the Outlaw HiFlow 636v Air Cleaner an Increase in Intake Velocity, giving your M8 all the Air it needs to Produce Maximum Power....CLEAN AIR - No hot oily air routed  into your intake! 

E-Z Installation with Step-by-Step Instructions.

Genuine K&N Filter with Million Mile Warranty.

Filter is re-usable.  Simply wash, let dry, & apply oil.  See Filter Service Care Kit HERE.


 There are optional Rain Socks to fit each of these filters that can be added on above. 

(You can see all the Rain Socks at this LINK)


You can upgrade to the Outlaw HiFlow 636v Air Cleaner without doing any dyno work or adding tuners on the M8, even with free flowing exhaust.  To see Why the M8 Does Not Need a Tune when Running Free Flowing Intake & Exhaust CLICK HERE.

This is a must for a Stage 1 Upgrade.

Replace the Restrictive stock air cleaner and wake it up!



This Air Cleaner fits OEM Milwaukee-Eight Throttle Body.

NOTE: With This Air Cleaner the OEM support bracket must be used. It is pictured below. If you don't have one, the HD Part # is 16400049 (it has a retail price of $17.09)




Harley routes dirty, oily crankcase air back into the air cleaner compromising the performance of your engine. The Outlaw Breathers vents it without compromising the performance or longevity of your motor.

Caution:  Motorcycles modified with this DK Custom Products High-Performance part may not be legal for public highway use in some areas.  The user shall determine suitability of this product for his or her use.

Patent Pending

Customer Reviews

Customer review Review by Ryan
Follow DK on YouTube and saw all the research they put into their products. I wanted a high flow system for the bike got the 636v. It is awesome I highly recommend for anyone looking to get an upgrade system, put it with the transformer you’ll be happy you did. Customer service was fantastic when needed a question about the product. (Posted on 8/7/2023)
Simple but extremely effective Review by Rich
This air breather is awesome. I can really tell the difference. The breather delivers all the air flow that the Milwaukee 8 needs. I recommend this breather to anyone who wants to upgrade their stock breather. DK customs is awesome, thanks. (Posted on 12/8/2018)

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