DK Custom Products

Phone: 662.252.8828
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4 Stage Black Catch Can for External Breather System EBS Harley

Availability: In stock
Item #: DK-4ST-CC-BLK
Manufacturer: DK Custom Products


DK Custom 4 Stage Catch Can EBS External Breather System Harley Davidson Performance Air Cleaner




Perfect for DK Custom Products 

Discrete & Premium Discrete

External Breather Systems

Made in The USA!




  • Black CNC-Machined Aluminum
  • Vented Cap
  • 4 Stage Internal Filtration System
  • 1 Extra O-Ring
  • 1 1/2" Diameter 2 5/8" Tall
  • Hose barb for 3/8" ID hose (same as hose barbs on EBS)
  • Also available-Aluminum Finish HERE
  • Made in the USA!


Hundreds of hours of research and thousands of miles of riding have resulted in this 4 Stage Catch-Can that allows air to pass through but keeps the oil and water in the Catch-Can on typical Harley's.  

See the photo's of the 8 different components that make up the 4 Stage System.  Even with the worst spitters most of the water and oil stays in the Catch-Can!


Designed for the hot, oily, watery, oxygen-depleted air to pass thru the tube, exiting near the bottom.


Most of the oil and water will drop into the low density foam.  The air, and some atomized water and oil hits the first separator, stopping some of the liquid, but allowing the air to continue on through the high density foam.  There are two more separators and two more pieces of high density foam that work at stopping the liquid, but let the air exit the vent holes in the cover.


Periodic emptying of the Catch-Can is easy.  Simply unscrew the can from the lid and dump it.


Cleaning of the foam and separators is not necessary, but easy to do if one wishes.


There is an extra O-Ring included, should the installed O-Ring get lost or damaged.


There is also a refresh kit with extra O-Rings and filtration system that is an option or can be purchased separately.



The EPA has required Harley to route hot, dirty, oily, oxygen depleted crankcase air back into the air cleaner compromising the performance & longevity of your engine. When using an External Breather System, your bike will run better and last longer.

This Catch Can is a nice option that will work with your Discrete or Premium Discrete Breather System.

Also available in Machine Cut Aluminum Finish that can be polished to a mirror finish, see at this LINK

 Patent Pending

Customer Reviews

Catch can Review by Dw
Great product, does what it says it does. Good finish on it, don’t mind having it standout on the side of the bike, not some ugly piece I had to tuck away under the bike (Posted on 11/5/2019)
Nice Product Review by C
Got the catch can to replace the exposed filter on my external breather which was letting some oil make contact with the heads and creating a burnt oil smell.

Installation was simple and its barely noticeable located behind the horn cover. Hopefully this stops the smell and I continue to enjoy the performance bump with this style breather vs the HD routing back into intake style but with no mess. :) (Posted on 10/25/2019)
Perfect Review by Joe T.
Use with J&P external crossover and about 3" of fuel line. Attached with black tywraps. Looks great and works better. No spray or leaks. Much better quality and pricing than others on the market. Highly recommend. (Posted on 10/1/2019)
good quality Review by joglock
The quality of the item is good and keep the primary cover nice and clean. (Posted on 9/25/2019)
Really works Review by Harry
I've used another brand before, but still got a little messy. This one works perfect. Great product, my brother and dad are both plan to get this style for their bikes too now. (Posted on 8/24/2019)
Great looking product !! Review by Grumpy
Have to love that CNC, they do great work. This a smart looking, well built and functional product. Some delay in receiving goods due to USA weather but communication on this was great. Pity the weak AUD makes purchases and freight to Australia dear. keep up the good work, thanks (Posted on 8/10/2019)
DK 4 Stage Catch Can Review by T11Spanner
I originally had the small catch can on my '17 M8 Ultra. I went with this one and no longer have oil on the pipes, saddle bag, seat and my pants. Easy install, works like a charm! (Posted on 7/16/2019)
Good quality! Review by Travis
This catch can has been great. No more oil on my bike or jeans. This is super easy to install and has been one of the best investments for my bike. Its super easy to unscrew and dump out and I will definitely do the breather kit with the catch can on any future bikes. (Posted on 6/4/2019)
Extremely Well Made Review by Wes
A very well made item and will be a very easy installation. Should also be extremely easy to service and maintain. (Posted on 5/4/2019)
DK catch can. Review by Yob
Great stuff, works well great price. Shipping was quick. (Posted on 4/23/2019)
Great job Review by Golfblues
I had the old style can which was smaller. This can holds a lot more and does not mist on the right side of my bike. The internals are much better than anything else on the market to keep the oil in the can. Great job by DK (Posted on 4/23/2019)
Catch can on 71 FLH Review by hscic
Installed this on my crankcase breather hose off my oil pump on a 1971 FLH Shovelhead. A little large but excellent quality nonetheless. (Posted on 4/9/2019)
Works great Review by Rich
This catch works great. Nothing but water leaves the can. No oily mess. All of the misty oil stays in the can. Great product. DK customs rocks (Posted on 2/10/2019)

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