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  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)
  • Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC (PSP-ENG-607)

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    Perrin Performance

    Perrin Air/Oil Separator | 02-14 Subaru WRX / 04-19 STi with FMIC

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    Phone 1-888-627-3736



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    Air/Oil Separator for WRX/STI with FMIC by Perrin

    The PERRIN Air Oil Separator is not a catch can. Catch cans capture engine blow-by and stores it in a container, which requires constant attention and removal of oil every few hundred miles. The air oil separator separates the oil from the air, draining it back to the engine, which eliminates the need for constant attention and draining of oil. As oil drains from the bottom of the PERRIN Air Oil Separator, clean oil-free air vents out of the top to rejoin the intake tract.

    The PERRIN Air Oil Separator features swirl pot technology and multi-layer baffles. This design forces incoming engine blow-by to move rapidly across the baffles, separating oil from the engine blow-by. Multiple layers of baffles means more surface area to collect more oil, making for a compact and efficient design. Oil entering from the crankcase vents spins counter clockwise through the entire body of the AOS, passing along four walls equaling roughly 50 sq/in of surface area. The multiple baffle walls in our compact design simulate the surface area of an AOS that is 13.5" tall!

    The base plate of the the air oil separator is heated by coolant drawn from the engine. The heats the entire air oil separator to the same temperature of the engine blow-by. By keeping the air oil separator the same temperature as the blow-by, water condensation is significantly decreased, allowing oil, air, and water vapor to separate and pass through the body. This vital feature eliminates nearly all the sludge that can build up in the air oil separator body, which is a common problem with catch cans and other air oil separators.

    Powder coated for protection against the elements, the textured finish will look awesome for years to come. The PERRIN Air Oil Separator is available in black or red texture powder coating.

    Please Note: The Perrin WRX/STi Air Oil Separator is Designed for Left Hand Drive Vehicles Only.

    Applications

    • 2004 - 2019 Subaru STi (FMIC)
    • 2002 - 2014 Subaru WRX (FMIC)

    Features

    • Swirl Pot Technology
    • Heated By Coolant
    • Increased Intercooler Efficiency
    • Reduced Carbon Build-Up
    • Custom Drain Back Crank-Case Fitting
    • Powder Coated Finish

    What's In The Box?

    • 1 - Perrin Air/Oil Separator
    • 1 - Mounting Bracket
    • 1 - Perrin License Plate Frame
    • All Necessary Hardware
    • Warranty Information
    • Stickers

    References

    Warranty

    • Manufacturer's Warranty

    Air/Oil Separator for WRX/STI with FMIC by Perrin

    The PERRIN Air Oil Separator is not a catch can. Catch cans capture engine blow-by and stores it in a container, which requires constant attention and removal of oil every few hundred miles. The air oil separator separates the oil from the air, draining it back to the engine, which eliminates the need for constant attention and draining of oil. As oil drains from the bottom of the PERRIN Air Oil Separator, clean oil-free air vents out of the top to rejoin the intake tract.

    The PERRIN Air Oil Separator features swirl pot technology and multi-layer baffles. This design forces incoming engine blow-by to move rapidly across the baffles, separating oil from the engine blow-by. Multiple layers of baffles means more surface area to collect more oil, making for a compact and efficient design. Oil entering from the crankcase vents spins counter clockwise through the entire body of the AOS, passing along four walls equaling roughly 50 sq/in of surface area. The multiple baffle walls in our compact design simulate the surface area of an AOS that is 13.5" tall!

    The base plate of the the air oil separator is heated by coolant drawn from the engine. The heats the entire air oil separator to the same temperature of the engine blow-by. By keeping the air oil separator the same temperature as the blow-by, water condensation is significantly decreased, allowing oil, air, and water vapor to separate and pass through the body. This vital feature eliminates nearly all the sludge that can build up in the air oil separator body, which is a common problem with catch cans and other air oil separators.

    Powder coated for protection against the elements, the textured finish will look awesome for years to come. The PERRIN Air Oil Separator is available in black or red texture powder coating.

    Please Note: The Perrin WRX/STi Air Oil Separator is Designed for Left Hand Drive Vehicles Only.

    Applications

    • 2004 - 2019 Subaru STi (FMIC)
    • 2002 - 2014 Subaru WRX (FMIC)

    Features

    • Swirl Pot Technology
    • Heated By Coolant
    • Increased Intercooler Efficiency
    • Reduced Carbon Build-Up
    • Custom Drain Back Crank-Case Fitting
    • Powder Coated Finish

    What's In The Box?

    • 1 - Perrin Air/Oil Separator
    • 1 - Mounting Bracket
    • 1 - Perrin License Plate Frame
    • All Necessary Hardware
    • Warranty Information
    • Stickers

    References

    Warranty

    • Manufacturer's Warranty

    Customer Reviews

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    MAP Limited Lifetime Warranty

    1.) All MAPerformance in-house fabricated parts include a Limited Lifetime Warranty for the Original Purchaser. This warranty only applies to the original purchaser and is non-transferrable. If the product fails it would need to be determined by MAPerformance that it is due to manufacturing defects in materials or workmanship.

    2.) This does not cover normal wear and tear. Improper use, modification, or abuse voids this warranty. MAPerformance will not be held responsible for additional costs due to the failure of a product (cost of sale, towing, labor, etc.). Warranty claims must be submitted to MAPerformance for review.

    3.) You must create a support ticket to acquire your return authorization number prior to returning the product.

    4.) Warranty claims will not be honored if the product was not purchased through an approved dealer.

    For warranty evaluation please create a support ticket via this form here.

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