An Air/Oil Separator has one job, remove the oil from the engine ventilation system so the oil does not get sent through the intake system.
The GrimmSpeed™ Air/Oil Separator for Subaru vehicles has a unique patent pending design that allows you to maintain your PCV Valve while separating the oil out of the crankcase and head ventilation air! Our AOS will allow your engine to run more efficiently due to the separation of oil from the intake system. When there is oil in your system, the result is 1) reduced fuel octane 2) higher chance of engine knock(detonation) 3) worse emissions 4) higher oil consumption. Our Air/Oil Separator will help all of these problems.
In typical GrimmSpeed™ fashion, we have made a very compact unit that packs a powerful punch(and looks good while doing it)!
No more having to check/empty your catch can and refilling your oil. The GrimmSpeed™ AOS coalesces oil without using a mesh media. Mesh medias can cause contaminates to collect and build up resulting in possible sludge. Our AOS is self maintained so you can just sit back, stop worrying, and enjoy driving your car!
Please note this product is designed to combat factory amounts of blow by. If you have a built motor or are experiencing abnormal amounts of oil consumption, this product may not work for you.
Air/Oil Separator FAQ:
Q: Is this beneficial on a street car? A: Yes. Even in stock form, you will experience oil going through your intake system. If you have ever looked in your intercooler piping you will notice a bunch of oil build up on the inside, our AOS takes care of this problem.
Q: I've heard about the milky oil substance in cold climates when using an AOS, is that relevant? A: During our testing here in the frozen tundra of Minnesota we have only noticed very minimal milky substance from the AOS. Condensation is allowed to collect on the inside of the core but will evaporate when the engine gets up to running temps.
Q: Why choose the GrimmSpeed™ AOS over other AOS products?
A: The GrimmSpeed™ AOS allows you to separate the vapors from both the heads and the crankcase. Others on the market only allow you to separate the vapors from the head. Also, our AOS allows you to retain the OEM PCV Valve. Being that it allows you to do both of these things at the same time makes it the most complete AOS on the market.
Q: How will this AOS increase my octane? A: When the oil vapors are mixed into the intake system, it effectively lowers the octane which can cause detonation. Installing our AOS will eliminate the oil vapors in your intake system thus eliminating the loss of octane. On modified cars this let's you get more aggressive with your timing/boost maps and will allow you to make more power!
Q: Do I need to carry around a 19mm socket to open it? A: No, we have sized the cap nut to be the same size as a lug nut. So as long as you have a tool to take your lug nuts off(which you should always have in your car), you will have a tool to open the AOS. On a proper running system you shouldn't need to open the AOS very often.
Q: How big is the unit compared to the oem oil cap? I'm running a FMIC and need to make sure it will fit
A: We created it so it will work perfectly with a FMIC as well. The body of our AOS as the same diameter as the oem oil cap.
RalliTEK branded products are warranted to the original owner against manufacturing defects in materials and workmanship for the lifetime of the product.
If a RalliTEK branded product covered by this warranty fails due to a manufacturing defect we will repair the product, without charge, or replace it at our discretion. This policy covers only original, unaltered, and unmodified materials and workmanship. This warranty does not cover damage caused by incorrect installation, accident, improper care, negligence, normal wear and tear, or the natural breakdown of colors and materials over extended time and use. Damage not covered under warranty may be repaired for a reasonable rate and a fee will be charged for return shipping.
No payment or reimbursement shall be made for installation, removal, transportation, or other charges. The remedies outlined in this instrument are exclusive and the liability of RalliTEK with respect to any sale shall not exceed the price of the product on which the liability is based.
For warranty evaluation, please contact RalliTEK Customer Service at (503) 619.0055 or info@rallitek.com to obtain a return authorization. Once this step has been completed, your product must be returned directly to theRalliTEK Warranty Department, 13339 NE Airport Way, Suite 500, Portland, OR 97230. All shipping to the Warranty Department must be pre-paid and insured. RalliTEK will not be liable for damaged or lost inbound packages.
NOTE: This warranty is only available within the United States or Canada
This warranty gives you specific legal rights; you may have other rights, which vary from state to state.
This warranty does not cover products sold by RalliTEK that are not RalliTEK branded products.
The RalliTEK website sells discontinued, special markup, and slightly blemished products at significant discounts as 'factory seconds' products. This warranty does not automatically cover products purchased as factory seconds. RalliTEK reserves the right to determine if any warranty applies on a case-by-case basis for factory second parts. If approved, the RalliTEK Warranty Department may repair factory second products for a reasonable charge and applicable shipping charges.
Non-RalliTEK branded products do not have any written or implied warranties. Products on RalliTEK.com are sold with the warranty applied directly from the manufacturer. The customer must contact the product brand manufacturer for any warranty details. All products sold by RalliTEK are intended for off-road and/or race use only, as suggested by the manufacturer, and should be installed and set up by professional service centers only.RalliTEK is not responsible for any product failure or failure due to installation. Should a warranty claim arise, the customer and the manufacturer will handle all warranty issues directly.
There is no warranty on high-performance or race-related parts due to the nature of usage.
No payment or reimbursement shall be made for installation, removal, transportation, or other charges. The remedies outlined in this instrument are exclusive and the liability of RalliTEK with respect to any sale shall not exceed the price of the product on which the liability is based.
EXCEPT AS STATED OTHERWISE IN THIS WARRANTY, RalliTEK MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. RalliTEK shall not, in any case, be liable for special, incidental, consequential, indirect, or other similar damages arising from any breach of these warranties even if RalliTEK or its agent has been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you. This warranty is governed by the laws of the State of Oregon.
Installation Instructions
Applications
Subaru Impreza WRX Base - 2002
Subaru Impreza WRX Base - 2003
Subaru Impreza WRX Base - 2004
Subaru Impreza WRX Base - 2005
Subaru Impreza WRX Base - 2006
Subaru Impreza WRX Base - 2007
Subaru Forester 2.5 XT - 2004
Subaru Forester 2.5 XT - 2005
Subaru Forester 2.5 XT Limited - 2006
Subaru Forester 2.5 XT Limited - 2007
Subaru Forester Sports 2.5 XT - 2008
Subaru Impreza WRX STI Base - 2004
Subaru Impreza WRX STI Base - 2005
Subaru Impreza WRX STI Base - 2006
Subaru Impreza WRX STI Base - 2007
Subaru Impreza WRX STI Base - 2008
Subaru Impreza WRX STI Base - 2009
Subaru Impreza WRX STI Base - 2010
Subaru Impreza WRX STI Base - 2011
Subaru Impreza WRX STI Base - 2012
Subaru Impreza WRX STI Base - 2013
Subaru Impreza WRX STI Base - 2014
Subaru Impreza WRX STI Base - 2015
Saab 9-2X Base - 2005
Saab 9-2X Base - 2006
Subaru Impreza WRX STI Base - 2016
Subaru Impreza WRX STI Base - 2017
