Moroso Air/Oil Catch Can Separator for Stock Air Cleaner Black

Item: 396647-27719963

$287.40

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Moroso Air/Oil Catch Can Separator for Stock Air Cleaner Black


The Moroso air-oil separator/catch can system keeps the H-D cylinder head breather system fully functional. It filters out crankcase vapors, oil mist & condensation that normally vent to the intake system. This will keep your air filter, throttle body, intake, pistons & valves free of excessive oil and carbon build up. Our system is different than others on the market. It separates the vapors breathing from your engine, collecting them in our air-oil separator/catch can system while clean filtered air re-circulates back into the intake. Once the air oil separator/catch can system fills, it will need to be drained as a service item. This also can be done at oil changes and normal service intervals.

  • From the factory, a motorcycle's breather system vents excess crankcase vapors, un-burnt fuel, residual oil and moisture back into the intake which compromises performance and durability
  • Plumbs inline of the breather system and filters the excess crankcase vapors, exhaust vapors, residual oil and moisture before it re-enters the engine, reducing detonation, knock and helps rid deposits in the intake tract including valves and pistons
  • The two piece body of the air-oil separator/catch can system unscrews for easy cleaning and service
  • The Moroso air-oil separator/catch can system does not vent to atmosphere like other breather kits on the market, this keeps oil in the canister, off your bike, and more importantly off the ground
  • Proudly Made In the USA

Product Note: Only fits models with stock air cleaner and intake components.

Specification Details
CARB Approved No
Color Black
Country of Origin USA
Engine Type Milwaukee Eight
Intake Stock

Vehicle Fitment


Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

Harley Davidson
  • FLHR Road King 2017-2022
  • FLHRXS Road King Special 2017-2023
  • FLHT Electra Glide Standard 2019-2022
  • FLHTCU Electra Glide Ultra Classic 2017-2019
  • FLHTCUTG Tri Glide Ultra Classic 2018-2025
  • FLHTK Electra Glide Ultra Limited 2017-2023
  • FLHTKL Electra Glide Ultra Limited Low 2017-2019
  • FLHX Street Glide 2017-2023
  • FLHXS Street Glide Special 2017-2023
  • FLHXST Street Glide ST 2022-2023
  • FLRT Freewheeler 2017-2025
  • FLTRK Road Glide Limited 2020-2023
  • FLTRT Road Glide 3 2023-2025
  • FLTRU Road Glide Ultra 2017-2019
  • FLTRX Road Glide 2017-2023
  • FLTRXS Road Glide Special 2017-2023
  • FLTRXST Road Glide ST 2022-2023

Customer Reviews


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Questions & Answers


How often does the catch can have to be drained and cleaned?

By Anon.

I tried a cheap oil catch can, rode the bike one time and oil blew out all over my bike. Do you have more pictures of yours of what it looks like inside?

It really depends on how much you ride and your bike's overall configuration. Moroso recommends that you check every 200 miles after initial installation until a baseline is established. A good baseline is to drain the Air Oil Separator when it is about half full. This will vary with temperatures (cold days vs. hot days). From there, you should have a better idea of how often to drain it.

By Tom

Have a question? Please ask our experts and customers who own this product.