DK Custom Products

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Stealth External Breather System Harley Sportster & Big Twin Evo

Availability: In stock
Item #: DK-B-SD-EBS-SP
Manufacturer: DK Custom Products

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Harley Davidson Stealth External Breather System Sportster & Big Twin Evo DK Custom Outlaw air cleaner EBS Roadster  high flow M-8 milwaukee-eight softail twin cam dyna 72 48 Big twin evo


External Breather System



Sportster Models 1991- UP

Big Twin Evo's

DK Custom Products



  • Fits All DK Outlaw & Many Other Air Cleaner Systems
  • Stealth Banjo Fittings at Heads for a Super Clean Look
  • Allows Discrete Placement of the supplied filter
  • Your Choice of Chrome or Black hardware
  • Washable Reuseable Filter - flexible placement
  • Includes 2 feet of hose for filter placement between heads
  • All needed hardware (including nylon washers for good seal)
  • Turn-Key System
  • Optional Black Fiber or Stainless Steel Braided Hose
  • Optional Hose Clamp Covers 
  • E-Z Install ~ Step-by-Step Instructions Included



An external Breather Kit is preferred with any Air Cleaner System.  This allows for only clean cool air to go into the air cleaner and engine, increasing performance and engine longevity.  This kit will work with ALL OUTLAW HiFlow Air Cleaners and many other aftermarket Stage 1 Air Cleaners*.  

This Stealth EBS is an optimized Kury BlueGrass.  It is unique in that it has arms built into the banjo fittings that route the hot oily air up, in-between the rocker covers, to the included filter.  It is extremely effective at keeping any oily mist from traveling out onto your bike, AND in being very hard to even notice that there is an EBS installed.

Available in Chrome or Black. You Choose when ordering.


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 air!

E-Z Install

Fits Most Sportsters 1991 & Up (except XR1200)

Fits Big Twin Evo's


*Fits ALL Outlaw Air Cleaners.  For aftermarket A/C's, If your air cleaner system utilizes a support bracket that is no thicker than 1/4", this will fit.  If you A/C uses a backplate that bolts into the heads, this will not fit.  You will need to use the Breather Bolts or one of our other External Breather Systems to allow you to route the hot oily air outside your combustion chambers.

There are Optional Black Fiber & Stainless Steel Braided Hose (more details HERE) & Black or Chrome Hose Clamp Covers (more details HERE) if you prefer that look to the Black Hose and plain hose clamps or zip ties.

You may choose to route the filter to anywhere on the bike you wish.


 In some of the pictures the Optional SS Braided Hose is pictured, as well as the Chrome Hose Clamp Covers.  These are not included in the kit unless you opt to include them when ordering.

Filter may, or may not, have a small loop in it.  This does not affect the aesthetics or installation choices. The filter may also vary in size, color and shape. 


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.

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