DK Custom Products

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External Breather System w/ Catch Can Harley Twin Cam

Availability: In stock
Item #: DK-TC-BRT-CC
Manufacturer: DK Custom Products

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External Breather System w/ 4 stage Catch Can Harley Twin Cam  Touring Softail Dyna DK Custom Harley Davidson High Flow EBS Outlaw M-8 Milwaukee-Eight Stage I Trike Tri Glide Freewheeler

Vented 4 Stage Catch Can

External Breather System




DK Custom Products

Made in The USA!



  • Fits almost All Air Cleaner Systems that use the stock breather bolts
  • Your Choice of Aluminum or Black Finish
  • Includes 6 feet of hose for maximum flexibility in Catch Can placement
  • All needed hardware
  • Turn-Key System
  • E-Z Installation, Instructions included
  • Made in The USA!


An external Breather System (EBS) is preferred with any Air Cleaner System.  This allows for only clean cool, oxygen rich air to go into the air cleaner and engine, increasing performance and engine longevity. 

This kit will work with the All the OUTLAW HiFlow Air Cleaners, and most other aftermarket Stage 1 Air Cleaners*.  It can even be used with the stock air cleaner.

The EPA has required Harley to route hot, dirty, oily crankcase air back into the air cleaner compromising the performance of your engine. This vents it without compromising the performance and longevity of your motor.

With this breather system you will experience a slight performance increase.  This is because engines like Cold, Dry, Oxygen Rich air!


 When ordering, Choose a Machine Cut Aluminum Finish or a Black Powder Coat Finish.

The Machine Cut Billet Aluminum Finish that can be polished to a Mirror Finish.

The top of the Catch Can is attached to the hose by a zip tie or hose clamp (both supplied w/ the kit).  The bottom of the Catch Can threads to the top.  

Anytime you want, you can un-screw the can portion, empty out all the gunk, and then thread it back together.

 The top of the Catch Can is vented, letting the air escape, while the 4 Stage Filtration catches and holds the oil.

 The Catch Can is 1 1/2" in diameter and 2 5/8" tall.  For more details on the 4 Stage Catch Cans, Click HERE.


E-Z Install

Fits All Twin Cam & Milwaukee-Eight Models - 2000-Up Touring & Softail, 1999-Up Dyna 

*If your air cleaner system will accept the Stock OEM breather bolts, then this breather kit will allow you to route the hot oily air to the supplied Catch Can that you can place anywhere you like. 


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.

Larry’s Discrete Head Breather System on 2015 Tri-Glide with Rushmore A/C with the Stock Cover

(also used a Vented Chrome Catch-Can, which you can see HERE)


Hope this will help someone else with their installation.


The pictures are as follows:



#1 - K&N air filter with nylon plug in hole where stock hose was.




#2 -  Stock hoses connected to hoses in kit, and exiting bottom of air filter housing through hole I had to drill.





#3 - Hose running on top of cam cover. ( I put a piece of split nylon wire wrap over rubber hose to protect it from heat and rubbing )




#4 - Hose routed on left side of oil pressure switch.





#5 - Hose routed on left side of rear brake control cylinder.




#6 - Hose coming straight down and secured with wire tie. Catch can is very secure and easy to access.





#7 Air filter installed. There is plenty of room for it and the breather hoses. Works great, and I think it looks fairly good.


Customer Reviews

External Breather System w/ Catch Can Harley Twin Cam Review by Phil
I used the kit on my Milwaukee 8 stock air cleaner. It works great i never realised how much actually came out of the breathers until after 2 weeks 800 miles of riding when I emptied the catch can. (Posted on 9/21/2020)
Awesome product Review by Mark
still using the stock breather for warranty purposes but loved the idea of not pumping hot oily air back into the engine. (Posted on 9/14/2020)
Great customer service Review by Soo
Easy install, customer support was great! (Posted on 1/14/2019)

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