Cobb Air Oil Separator WRX 2015-2021

Rated 5.0 out of 5
Based on 3 reviews
Cobb Tuning
cobb843615
41 In stock

$540.00 $486.00


Fastrak Delivery: , Order within hours minutes



$486.00

Fitment Information:

2015-2021 Subaru WRX

The COBB Air/Oil Separator is placed within your Subarus crankcase ventilation system and helps to prevent oil vapors from being introduced into the intake system. Oil vapors passing through your engine's intake system lower the effective octane rating of fuel and can contribute to both oil and carbon buildup over time.

Features:

  • 1 Liter Holding Capacity
  • Integrated ORB Ports
  • Compact Cast Aluminum Body w/ Black Powdercoat Finish
  • Heat Shielding on Crankcase Breather and Oil Return Lines
  • Coolant Bleeder Valve
  • Bespoke COBB Color Combination
  • Laser Etched COBB Logo
  • Difficult Installation Effort
  • Installation Guide

The Subaru FA engine has 3 ports that vent crank pressure: one on each cylinder head and another on the top of the block. Each engine vent port receives its own connection to the AOS. By giving each engine port its own entrance to the AOS we have allowed for more effective and faster excavation of crankcase pressure. Additionally, this reduces overall system pressure. With a 4" OD and 5.75" height, the AOS has an approximate 1 liter of holding capacity. The larger the AOS, the more power you can safely make without having to worry about the AOS overfilling.

The bottom of the AOS is shaped like a snail, redirecting positive crank pressure into the same swirl pattern produced by the 3 side ports. Allowing maximum oil drainage while separating oil from the air in all the venting ports.

The back plate of the AOS features a unique coolant routing system that heats the entire AOS to the same temperature of the engine. This maximizes the evaporation of any water collecting inside of the can. The hotter the AOS, the less water will collect inside and mix with the oil.
average rating 5.0 out of 5
Based on 3 reviews
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3 Reviews
Reviewed by Mark C.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Tough install but mandatory mod

Highly recommend for all FA motors to extend engine lifespan

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Reviewed by Gabriel, from United States
I recommend this product
Rated 5 out of 5
Review posted

Great upgrade

This AOS is a must have for your WRX!

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Reviewed by Greg L C., from United States
I recommend this product
Rated 5 out of 5
Review posted

Works

The IAG/COBB is a great investment for the direct injected engine

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Cobb Air Oil Separator WRX 2015-2021
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