DK Custom Products

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4 Stage Machine Cut Billet Catch Can for External Breather System EBS Harley

Availability: In stock
Item #: DK-4ST-CC-MCF
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!




  • 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-Black 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 Powder Coat Black Finish, see at this LINK

These have a Machine Cut Billet Aluminum Finish that can be polished to a Mirror Finish.  See photos.

 Patent Pending

Customer Reviews

Looks great Review by Alan
Replaced my air cleaner on a 1998 Dyna Wideglide and decided not to vent the oil from the head breather bolts back into the engine. This catch can allows the oil to be captured and emptied occasionally when needed and it looks great! I purchased the cnc machined aluminum version. (Posted on 3/20/2019)
great product Review by Cecil
was easy to install. shined up great on the buffer. looks great. (Posted on 3/15/2019)
Excellent Review by LJ
As always, excellent quality part with functionality as expected. Always a pleasure to do business with DK Customs. Customer service is exemplary. (Posted on 3/9/2019)
100% Good Review by Out to Lunch
Helpful , Top notch products , I'll happily return as the need a rises (Posted on 1/19/2019)
Awesome product Review by C-Bass
Great product and awesome customer service/tech support. (Posted on 12/22/2018)
Great quality Product Review by Syl
I have to wait until summer to test it
Live in canada (Qu├ębec) (Posted on 12/13/2018)

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