DK Custom

External Breather System w/ Catch Can Harley Twin Cam & M8



Color of catch can: Black
Only 2 units left


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
  • Uses Your OEM Breather Bolts with Nipples (not included)
  • Turn-Key System
  • E-Z Installation, Instructions included
  • Made in The USA!

Looking to add a Refresh Kit for the Catch Can. CLICK HERE

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 if it uses the OEM breather bolts with nipples.

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.

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.

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


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

Looking to add a Refresh Kit for the Catch Can. CLICK HERE

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 with nipples, 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. 


Customer Reviews

Based on 4 reviews
Bill Salvino
DK and MI

All I can really say about the catch can, as I haven’t risen yet with it on, is…Easy to install, the canister itself appears to be well made and looks cool. As for Motorcycle Innovations, exceptional. Service, knowledge and shipping. First class. Respect.

Guy Hardy

External Breather System w/ Catch Can Harley Twin Cam & M8

Marshall Crinklaw
Oil can design

The only item that I don’t care for is the fact that the 1/4 inch tubing will not push directly onto the catch can - they use another larger piece to make the coupling which looks a bit bush league.

Product was perfect

Exactly what I wanted and expected,... fast delivery and will look at Motorcycle Innovations for future needs. Thanks

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