DK Custom Products

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

Outlaw HiFlow 636v Air Cleaner Twin Cam - Complete System

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

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Outlaw HiFlow 636v Air Cleaner Twin Cam - Complete System Softail Dyna Touring Trike Freewheeler 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

Touring ~ Softail ~ Dyna Twin Cam Models

~NewGen 636v~

 ~Optional Rain Sock~

~Fits EFI & Carbureted~

MADE in The USA!

DK Custom Products



  • Genuine K&N Air Filter (Choice of 4 different sizes/shapes)
  • Forward Facing - Improved leg clearance
  • Choice of Black or "Chrome" Powder Coat Finish
  • Patent Pending NewGen Design Increases Air Velocity
  • Your Choice of External Breathers (NO oil air in engine)
  • Support Bracket - Powder Coat Black Finish
  • Filter Element is out in the air for Cold Air Intake
  • Harley Heavy Breather Covers will Fit with the Round Filter
  • E-Z Step-by-Instructions Included
  • Made in The USA!

Outlaw HiFlow 636v Air Cleaner Twin Cam - Complete System

Pictured above is the Large Oval Filter Element w/ Black endcap


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.

Choose Between:

Intake Tube in Black or "Chrome/Silver".  These are both Durable Powder Coat Finishes.  See pictures below.

There are 4 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.)

(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.

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

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

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 Twin Cam all the Air it needs to Produce Maximum Power....CLEAN AIR - No hot oily air routed  into your intake! 

This is a must for a Stage 1 Upgrade.

See Dyno Charts Below!

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.

Fits ALL Twin Cam Models (1999-Up)


2000-2015 Softail (cable operated throttle)

2016-UP Softail (Throttle by Wire TBW)

1999-Up Dyna (cable operated throttle)

2000-2007 Touring (cable operated throttle)

2008-Up Touring (Throttle by Wire TBW)

For 114 models that have a Ventilator or similar A/C, you will need a support bracket, the HD Part # is 16400049 (it has a retail price of $13.49)


If you like the covers that fit on the Heavy Breather, they will also fit on the 636v that is equipped with the Round Air Filter Element.  You can see it in one of the pictures above.  

We do not sell these covers, but you can pick one up at a Dealership, ebay, Amazon, or you might already have one.

 If you have a 2008-Up Touring Model, or a 2016-UP Softail,  it has Throttle by Wire (TBW) and you must check the TBW in the "Color of Intake Tube" below to get the correct bolt pattern.

You can upgrade to the Outlaw HiFlow 636v Air Cleaner without doing any dyno work or adding tuners IF you leave the stock exhaust in place.

 Replace the Restrictive stock air cleaner and wake it up!

**This Air Cleaner System comes with a Support Bracket.  If you already have an aftermarket support bracket, or you have one of the few Twin Cam Models that comes with a Support Bracket,  you may click the box below and save $22.  Look at our Support Brackets HERE.

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


"If people only knew what a difference it (636v) makes above and beyond other high flow systems you would have the market cornered.

Thank you for a really good and effective product and it is well made and fits up with absolutely zero issues." -Dennis T

Customer Reviews

The Real Deal Review by Jimijoe
Anyone considering purchasing this air cleaner should get it because it really works! I had an S&S Stealth on my Mikuni carbed 95" Twin Cam and immediately noticed the difference just at idle after replacing it with the 636V...IMHO this is perhaps THE best air cleaner available!!! (Posted on 12/6/2022)
What a Difference Review by Revneck
I bought the 636v to replace my existing intake of similar design and after bolting it all up I decided to fire the bike up. I'm already hearing the difference in the tone of the exhaust and with the breather bolts it seems my engine is running much more efficiently at idle. I can't wait until the crappy weather passes so I can put some miles on it! I'm stoked! (Posted on 1/27/2022)
Wow! Just Wow! Review by Whitestone
I installed the 636v on my TC88, which I had top end overhaul and upped to 95, S&S cams, 11:1 comp. Custom heads, and more. I was using a Big sucker for the first 3 months, then I learned about DK from youtube, watch their videos, and realized this is the air cleaner I need. Had small issue with carb vent, but DK's customer support was out standing!!! and we quickly resolved that problem. Now the power my bike has feels limitless. Thanks DK (Posted on 10/25/2021)
True Performer! Review by Mayra
Took me about 25 videos to finally get it since I didn't noticed a big improvement with my first "High Flow"/expensive Air Cleaner. This one with the external breather system will give you an instant gratification!! A true performer ,the real deal! Thank You! Turbo Fast Shipping and the best customer service on earth! (Posted on 4/22/2021)
Great product, price and support Review by Mike
Ordered this for my 05 lowrider. What a difference on the high end. Easy install. Good quality. Big difference. I live way out of major city so I don't deq. Very satisfied. (Posted on 9/3/2020)
Fantastic Products Review by Lee
I love

My orders are shipped fast and everything is packaged well. This company will help you keep your dream bike running faster and cooler and also prolong its engine life. They have some really good videos too. People all over are using their products. (Posted on 6/23/2020)
Fantastic Products Review by Lee
I love

My orders are shipped fast and everything is packaged well. This company will help you keep your dream bike running faster and cooler and also prolong its engine life. They have some really good videos too. People all over are using their products. (Posted on 6/23/2020)
Great product Review by Stitches
Great product poor support later on.

***I am so sorry to hear this. Please contact me directly at [email protected] Superior Customer Service is a Top Priority, and I want to fix wherever we dropped the ball.***
Kevin, the "K" in DK. (Posted on 11/20/2017)

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