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GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
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User Media for: GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
User Media for: GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
User Media for: GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
User Media for: GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
User Media for: GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
User Media for: GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
User Media for: GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
User Media for: GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
User Media for: GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
User Media for: GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+
User Media for: GrimmSpeed Air Oil Separator Red - Subaru WRX 2002-2007 / STI 2004+

GrimmSpeed Air Oil Separator Red

Subaru WRX 2002-2007 / STI 2004+

Read 28 Reviews | 14 Q&As
Part # 078006R
$269.10
10%
OFF
msrp: $299.00

In stock! Ships same day
if ordered within 5 hrs 11 mins

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.
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REVIEWS & CUSTOMER MEDIA

28 Reviews
4.5 out of 5 Stars
5 Stars
(22)
4 Stars
(1)
3 Stars
(3)
2 Stars
(1)
1 Stars
(1)
Customer Photos and Videos
GrimmSpeed Air Oil Separator Red ( Part Number: 078006R)
GrimmSpeed Air Oil Separator Red ( Part Number: 078006R)
GrimmSpeed Air Oil Separator Red ( Part Number: 078006R)
GrimmSpeed Air Oil Separator Red ( Part Number: 078006R)
GrimmSpeed Air Oil Separator Red ( Part Number: 078006R)
GrimmSpeed Air Oil Separator Red ( Part Number: 078006R)
GrimmSpeed Air Oil Separator Red ( Part Number: 078006R)
GrimmSpeed Air Oil Separator Red ( Part Number: 078006R)
GrimmSpeed Air Oil Separator Red ( Part Number: 078006R)
GrimmSpeed Air Oil Separator Red ( Part Number: 078006R)
GrimmSpeed Air Oil Separator Red ( Part Number: 078006R)
3 Month Review Update 10 months ago
5out of 5stars

I am very satisfied with this GS AOS. I checked my oil 3 months after the install and it was still visible on my dipstick. I usually have to add 2 quarts after the first first month of driving and i didn't have to! This has help with my oil consumption greatly and no longer have oil being mixed in with air and fuel in my cylinders under WOT!
  
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Well needed upgrade to PCV system 11 months ago
5out of 5stars

I have a rebuilt motor with forged internals on my 2003 WRX and had a lot of blow by and thought it was my turbo. After installing this and taking it for a drive I've notice smoother acceleration and a more stable idle and no more smoke visible under hard acceleration!
  
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Grimmspeed air oil separator  1 year ago
3out of 5stars

Like the quality of the product and all the hardware is there ready to install. But the thing I didn't like is that it doesn't come with instructions for installing it comparar to perrin oil catch can
  
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Bling with purpose 2 years ago
5out of 5stars

The AOS was easy to install, integrates well, and is well engineered.
  
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Excellent product 2 years ago
5out of 5stars

Great quality, easy installation and helps the engine a lot
  
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QUESTIONS & ANSWERS

  • Q: E85 capable   Justin2 years ago

    Is this AOS capable of working with e85?
  • Q: Power  JimmyAdeux2 years ago

    Is there a maximum power this AOS can hold? Example; 20psi, 340whp
    • 0 of 0 people found the following answer helpful

      A:  Performance isn't dictated by a certain PSI, rather how much blow-by the motor has. If the engine is healthy and not a lot of blow-by is making it past the piston rings, then the AOS will function properly. If on the other hand a lot of blow-by is making it through, then the unit won't be able to separate the air/oil mixture quickly enough and you'll find oil getting in your car's intake tract.

      Jared A. @ RallySport Direct 2 years ago  
        
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  • Q: PCV Valve Removal?  VItaminRich2 years ago

    Do you keep or remove the PCV Valve with this Separator installed?
  • Q: Instructions for fmic  xsaint77410604 years ago

    Are there directions for a fmic
    • 0 of 0 people found the following answer helpful

      A:  If you have a FMIC, the instructions are identical except the bottom right port on the AOS will not go to the oem head breather hardline, it will go to your existing “T” for the head breathers.

      Brady R. @ RallySport Direct 4 years ago  
        
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  • Q: what is the difference between this and Perrin/Crawford based AOS systems?  Evren5 years ago

    if you could shed some light that would be great on my order decision. Thanks
    • 0 of 0 people found the following answer helpful

      A:  This system routes blow by back to the oil feed tube, it is also unbaffled and not recommended due to the location for heavy track use. The Crawford and Perrin AOS systems are coolant cooled and work very well for track applications. This is a simple AOS that doesn't break the bank and is much easier to install than the other two.

        
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