The GrimmSpeed Subaru Air/Oil Separator has a unique design that allows you to maintain your PCV Valve while separating the oil out of the crankcase and head ventilation air! Available for Subaru WRX, STi and LGT models in black or red.
| Vehicle Fitment: | Color: | Part Number: |
| 2004-2021 STi 2002-2007 WRX |
Black | 078006 |
| Red | 078006R | |
| Blue | 078006B (Discontinued) | |
| 2008-2014 WRX 2005-2009 Legacy GT |
Black | 078016 |
| Red | 078016R | |
| Blue | 078016B (Discontinued) |
The 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:
- Reduced fuel octane
- Higher chance of engine knock(detonation)
- Worse emissions
- Higher oil consumption
The Air/Oil Separator will help all of these problems!
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. The 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. The blue finish was discontinued in May 2022.
Install Guides:
• For 2002-2007 Models
• For 2008-2014 Models
GrimmSpeed 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.
Q: What models will this fit?
A: Ours will fit EJ series turbo Subaru engines
| Select Color: | Black, Red |
|---|---|
| Select Vehicle: | 2004+ STi / 2002-2007 WRX, 2008-2014 WRX / LGT |
Fast Shipping with Professional Packaging
We provide a variety of shipping options thanks to our long-standing relationships with UPS, FedEx and DHL. Our warehouse personnel are well trained and will be able to pack your goods in accordance with the exact and precise specifications. Before shipping, all goods are carefully examined and secured. We deliver to thousands of clients each day across multiple countries. The fact that we're dedicated to becoming the largest online retailer in the world is obvious. Warehouses and distribution centers can be found in Europe as well as the USA.
Orders that contain more than one item are assigned processing times according to each item.
We will inspect each and every one of the items ordered before shipping. The majority of orders are shipped within 48-hours. Delivery is expected to take between 3 and seven days.
Returns
We do not manage the stock in our warehouse or factory. The levels of stock can change at any time. Please be aware that it's possible for your order to be out of stock after you have placed the order.
The policy is 30 days. If it's been longer than 30 days since you bought the item We're sorry to say that we can't offer you a full refund or exchange.
The item cannot be used, and it must be in its original condition. It must also still be in the original package.
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