DK Custom Products

Phone: 662.252.8828
Text: 662.420.4891
Email: [email protected]

Black Bobber HiFlow 606 Air Cleaner Sys. Harley Milwaukee-Eight

Availability: In stock
Item #: DK-AC606-BB-M8
Manufacturer: DK Custom Products

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Black Bobber HiFlow 606 Air Cleaner Sys. Harley Milwaukee-Eight DK Custom Milwaukee-Eight Maximum Power High Flow Harley Davidson performance air cleaner 606 intake kit K&N EBS External Breather System Stage I Outlaw

Outlaw HiFlow 606

Air Cleaner System



~Complete High Performance System~

~Black Bobber Style Cover~ 

MADE in The USA!

DK Custom Products



  • Tapered HiFlow Genuine K&N Air Filter
  • 6 1/4" Base & 5 1/2" Face Diameters 
  • Designed Specifically for the M8 Engine
  • Black Bobber Style Cover - Size: 7 7/8" Diameter & 2 1/8" Deep
  • Your Choice of External Breathers (NO dirty air in engine)
  • All A True Stage l Air Cleaner
  • E-Z Step-by-Instructions Included
  • Made in The USA!


The Outlaw HiFlow 606 System will give your M8 the Air it needs to Produce Maximum Power.  CLEAN AIR - No dirty air routed back in! 

This system is TURN-KEY.  It comes with everything needed to replace the restrictive stock air cleaner.

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.

Fits Milwaukee-Eight Models.

This is a must for at Stage 1 Upgrade.


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, the Discrete, or the Premium Discrete  To see full details on All these choices Click HERE.  


When choosing between the 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 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.


This System comes with a Black Bobber Style Cover.


You can upgrade to the Outlaw HiFlow 587 Air Cleaner System without doing any dyno work or adding tuners IF you leave the stock exhaust in place. To see Why the M8 Does Not Need a Tune when Running Free Flowing Intake & Exhaust CLICK HERE.



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.


"Top Peformance, no dirty air in the engine, and a Classic Look.  DK does it again!"  -Nomad Pete

Customer Reviews

Great Review by Kyle
Easy to install and super clean only thing I had to do was make the holes slightly bigger on air filter it self used a round file
Happy as can be with this set up on my 17 m8 ultra limited (Posted on 2/23/2021)
Great product Review by jim
I installed this 606 system on my 2019 Softail Slim. The instructions were clear and all parts fit perfectly. I like this as it maintains the stock bobber look with a slightly smaller diameter cover. (Posted on 7/17/2019)
Flawed, but saved by excellent service Review by Belloc
The individual parts of this kit are well-made, but there were several snags getting it mounted due to some weird issues that would take too long to explain here. I did get it installed though, after a couple of hours of tinkering. I wrote out the problems I had in an email to DK that night, and Dwayne called me first thing the next morning, apologized for the trouble, explained various things and fixes for future kits, and promised to put several parts in the mail should it give any trouble in the future. So I guess this is as much a review of DK's service as of the kit. In any case, the kit makes a very noticeable difference in the bike's performance - there's a bump in power, and just as useful, a dramatic improvement in throttle response, all without touching the mapping or stock pipes, and without making it run lean (see DK's testing on this kit - it feels even better than their dyno tests suggest). I can't believe changing the filter made this much difference. The critical thing for me was that it doesn't make it run lean, but the only reason I did it was to get the breathers out of the intake after seeing all the oil in the stock paper filter the first time I cleaned it, and feel the improvement just cleaning that paper filter. Anyway, highly recommended. (Posted on 1/7/2019)

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