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GrimmSpeed Air Oil Separator Red (Part Number: )
GrimmSpeed Air Oil Separator Red (Part Number: )
GrimmSpeed Air Oil Separator Red (Part Number: )
GrimmSpeed Air Oil Separator Red (Part Number: )
GrimmSpeed Air Oil Separator Red (Part Number: )
Community Media
GrimmSpeed Air Oil Separator Red (Part Number: )
GrimmSpeed Air Oil Separator Red (Part Number: )
GrimmSpeed Air Oil Separator Red (Part Number: )
GrimmSpeed Air Oil Separator Red
Subaru WRX 2008-2014 / Legacy GT 2005-2012
Read 4 Reviews | 5 Q&As
Part # 078016R
$299.00

In stock! Ships same day

Features & Product Details

The Grimmspeed Air-Oil Separator (AOS) is one of RallySport Direct's highly sought after items. Grimspeed uses a unique patent pending design which allows you to maintain your PCV valve while separating oil from the air in both the heads and crankcase. These boxer engines have inherent issues with harmful oil and vapors getting into the intake system of your vehicle which can cause issues like having an effect on the octane rating with your gas, and after long periods of use and mileage can cause buildup on your valves.

This particular air-oil separator takes the place of an oil catch can, or a tank which is convenient to eliminate the need to empty the catch can. This is a subtle installation that replaces your factory oil filler cap.

New lines, fittings, and zip ties will be included to make this catch can system ready for the installation. 

Note that this particular unit will come in the anodized red finish for protection against corrosion, and to add a nice touch to the theme of your engine bay. 

Specifications

Brand: GrimmSpeed
Color: Red
Installation Hardware Included: Yes
Material: Aluminum
Mfgr. Warranty: Lifetime
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days


Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
RallySport Guarantee

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REVIEWS & CUSTOMER MEDIA

4 Reviews
3.8 out of 5 Stars
5 Stars
(2)
4 Stars
(1)
3 Stars
(0)
2 Stars
(0)
1 Stars
(1)
Customer Photos and Videos
GrimmSpeed Air Oil Separator Red ( Part Number: 078016R)
GrimmSpeed Air Oil Separator Red ( Part Number: 078016R)
GrimmSpeed Air Oil Separator Red ( Part Number: 078016R)
DON'T BUY IN AREAS OF SNOW 2 years ago
mike12smith
I purchased my AOS about a year ago and lived in NC where the weather never gets much colder than 32. Now i live in NY and I have nothing but problems with this AOS. It creates a milky residue that freezes in the lines and also PCV valve. I've been having issues with my car burning insane amounts of oil and blowing smoke out the back like a waazoo and this AOS is the problem. I had no issues in the warm temps but I highly do not advise on buying this if you'll be driving in cold temps. Product is worthless and only harmful to my car in the winter. Recommended buying IAG AOS if you live in colder climates.
  
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Clean and Easy 2 years ago
Confoosed_drummer18244831
Fairly straight forward and easy. All the hoses and fittings are of good quality and the AOS is very well made. Had a bit of an issue with the passenger side head tune but got it all to fit nicely. All in all pretty impressed and looking forward to no longer have oil going through my Intake.
  
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1 of 1 people found the following review helpful
14 WRX Hatch 3 years ago
truckstick101
Came with everything I needed. the instructions from grimspeed's website were somewhat hard to follow but accurate. Install took about 1.5 hours and I didn't use the zipties provided. (bought worm clamps 5/16" - 7/8" & 1/4-Inch-5/8-Inch Pack of 20) ALSO lube the ends of the connectors before trying to insert them into the tubes.... cut my hand trying to force it in without lube ... because I'm a genius.
  
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Works great 3 years ago
michael.sutphen61953
I have had this AOS on for about 5k miles. I recently took my intercooler piping off the other day and everything is bone dry of any oil.
  
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QUESTIONS & ANSWERS

  • Q: efficiency  12WRX2 years ago

    I'm curious as to how efficient this is. I couldn't find any design information for it and although i love the location of it i feel like it wouldnt be as efficient as a rectangular or cylinder model. Any info you can give me?
    • 0 of 0 people found the following answer helpful

      A:  It is quite efficient! It routes oil back into the oil feed tube just as any other AOS would.

      Chris W. @ RallySport Direct 2 years ago  
        
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  • Q: 2011-2014 WRX  parapd5 years ago

    With a Perrin or another brand Turbo Intake tube installed, what would you do different with the PCV plug, and tube that runs from under the intake manifold? Any direction would help, considering buying this, however whats the different set up running the vacuum lines with the Turbo tube installed? Thanks
    • 0 of 0 people found the following answer helpful

      A:  Installation will remain the same while using an aftermarket inlet. You will just have one less connection to remove and cap. Mike

      GrimmSpeed
        
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  • Q: 2011 WRX Update  mattonio6 years ago

    Having read the other reviews. Is this set up for the 2011 wrx with the 1/2 to 1/2 connector as others have said to do? Anything I would need to watch out for that's different from the video thats for 2008 models to my 2011 model?
    • 0 of 0 people found the following answer helpful

      A:  There are a few differences, but Grimmspeed has the detailed steps in their writeup for installing the air/oil separator in the link below. https://www.grimmspeed.com/install_guides/subaru_aos_08wrxLGT.pdf

      Nick S. @ RallySport Direct 6 years ago  
        
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    • 0 of 0 people found the following answer helpful

      A:  Hello, Yes this is the correct kit for your car. The installation will remain the same but there might be some minor differences in the appearance of valves at fittings. Installation should not be changed though. Mike

      GrimmSpeed
        
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  • Q: Top mount intercooler  mattonio6 years ago

    Will this fit if I get a process west top mount intercooler down the road? I have a 2011 wrx.
    • 1 of 1 people found the following answer helpful

      A:  Yes it will with no issues.

      Kirill C. @ RallySport Direct 6 years ago  
        
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    • 1 of 1 people found the following answer helpful

      A:  Yes this will fit just fine! There should be no fitment issues with a top mount IC. Mike

      GrimmSpeed
        
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  • Q: fmic compatable?  philiec6 years ago

    will this work with a fmic or will it need longer hoses
    • 0 of 0 people found the following answer helpful

      A:  This should work with a FMIC set up as long as your piping has the appropriate ports for routing the head breathers. You will also want to make sure your piping isn't touching your oil cap. Mike

      GrimmSpeed
        
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