GrimmSpeed

Grimmspeed Air/Oil Separator | 2002-2014 Subaru WRX and 2004-2021 Subaru WRX STI (GRM078006)

SKU: GRM078006-GRIMM

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Vehicle

02-07 WRX and ALL STi

08+ WRX | 05+LGT | 09+ FXT

Color

Black

Red

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$350.00

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AIR/OIL SEPARATOR - WRX/STI/LGT/FXT

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 AOS is unique as it 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 AOS will solve all of these problems.

In 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!

Features

Removes oil vapors from the intake
Retains OEM PCV Valve

Benefits

Effectively increases octane by removing oil vapors from the intake system

Applications

2002-2007 Subaru WRX
2004-2021 Subaru STI
2008-2014 Subaru WRX
2005-2009 Subaru Legacy GT
2009+ Subaru Forester XT

What's In The Box?

AOS
Fittings
Hose

References

Warranty

Manufacturer Standard Warranty

Air/oil separator

Easy to install great instructions works well

So far so good...

I've only had the AOS installed for a few weeks on my '05 OBXT (185K miles), but so far so good after rechecking all hoses and connections. I had to take off a star because when I opened the box, there were no instructions included. I had to watch a few YouTube videos and download their instructions from the Grimmspeed website. The paper instructions had the better details. A few install issues along the way but no 'show stoppers'. Because of the AC line, the AOS had to be pointed towards the battery. It could not be pointed towards the firewall because the hoses would interfere with each other. Also, when installing the short hose to the PCV 'tee', the hose nipple from the tee angles towards the intake so you have to try to get the short hose onto it at a bad angle. I had to heat it up and use oil to get it on there. After some wrestling with it, I was able to get it on. Otherwise, everything else went smoothly. It's too early to tell if the AOS is effective but I'm confident based on what I've seen online.

Grimmspeed aos

Easy instal. Didn’t use barbs had plenty of hose left. Looks good. Bought the anodized red one.

Great Air/oil separator for a good price

MAP always has parts ready to ship. They shipped this item to me so fast. I love MAP customer service and the part works great. I’m not going to write a full on review since I’m no professional, but this definitely helps with oil consumption just like all the other A/O separators, but this is priced pretty fairly and the brand never disappoints. Great product and great customer service.

Easy install that makes sense.

Great entry level AoS. If you are looking for a good AoS for a lightly modded daily driver, this is it. If you are going for more power then you may want to look at the IAG street/comp series. My car is a stage 2 and this works great for the minor bolt ons. Helped cleanup Knock and Fine Knock readings as well. Make sure the air going into the car is clean buy an AoS immediately.

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