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Ford Performance Oil-Air Separator; Passenger Side (11-17 GT; 12-13 BOSS 302; 15-20 GT350)

Item 390923
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Market Price $197.75 You Save 12% ($22.75)
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$175.00 (kit)

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      Review & Installation Video

      Hey, guys. Stephanie with, here with a review and install of the Ford Performance oil-air separator for the 2011 and newer Coyote. An air-oil separator is a simple mod that does some good for all applications. A catch can might not be one of the first mods that's on your list, or it may not even be on your list at all. But it's a very functional piece that has benefits to it, and it can do good for even a completely stock motor. The Ford Performance oil-air separator is going to be for those of you out there that are looking for an air-oil separator that has OEM hoses and fittings, and that has an OEM look instead of the aftermarket look that most separators have. The big difference with this separator is really going to be in the looks and styling. This really does look like an OEM part. I mean, look at it. It looks like something that you'd pop your hood and see in the engine bay, right from the factory. This is way more low-key than other separators and catch cans in my opinion, and it's not something that's going to stand out in the engine bay. As far as functionality, you're seeing the same benefits here and you might be wondering why you'd even want to consider an oil separator. With an internal combustion engine, the ignition of the air and fuel mixture inside of the combustion chamber is ignited and it forces the piston down. There's a small amount of that mixture that leaks past the piston rings and into the crank case. This is blow-by, and in that blow-by there's an oil mist. The blow-by and oil mist will settle in the intake, and over time they're going to form a gunky buildup. Now, technically speaking, there can also sometimes be some condensation, along with oil mist and blow-by. If you let all of this hang out, worst case, this stuff can make it into the oil inside of the crank case. This is not a good thing, and it's considered oil contamination and dilution. So you've got your PCV valve to help fight this issue. A PCV valve alone has its own list of weaknesses and engines have regulations, as far as emissions go. So the current setup, as far as crank case ventilation systems, means that an engine will have detonation or knock when oil is in the combustion chamber. Another thing that happens is carbon buildup on the piston tops and the valves, as well. Enter into the scene the oil separating catch can. It's going to push these gases, the blow-by and the oil mist, and the condensation, through a baffle system that's going to trap the oil and separate it from the other gases. The gases are going to be allowed to continue through the intake, so they can be burnt off, and the oil will stay in the catch can, so it doesn't move on and cause issues for the engine. This separator is going to sit right on the passenger side in front of the engine. It has a different, unique filter media system that's going to separate the air and the oil. It's also going to come with OEM fittings and hoses, which is a nice feature. The only thing that I don't like about this separator is the fact that there's no drain in the separator. A lot of other options out there have a drain in the bottom, which will allow you to easily drain the can. You have to find another way to empty this can, but that isn't the end of the world. Most people found that a syringe worked well for them, or you can always remove the separator from the car, since it installs easily, and drain the oil that way. When it comes to application, Ford Performance does label this as an "off-road use item only." That's because it does interfere with the PCV system and what's standard and accepted, as far as emissions and regulations requirements. When it comes to price, you're looking at just over $150 for this separator. Now, this isn't the least expensive option that you have, but it isn't the most expensive either. You are getting a direct-fit item here, with OEM hoses and fittings. The install for this is very easy, and should take about a half-hour tops. I'm going to call it a one out of three wrenches on the difficulty meter. All you're looking at needing to do is removing the breather hose and the passenger side valve cover, removing the electrical harness, and getting the separator into place using the provided pushpins. You reinstall the electrical harness and install the breather hoses as well, and that's all you're looking at for the install. Wrapping things up here with the Ford Performance oil-air separator, this is a direct-fit separator that comes with OEM hoses and fittings. The separator has an OEM appearance, and you can check it out more online right here at

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Reduce Engine Sludge
      • Precision Molded
      • OEM Hoses and Fittings
      • Plug and Play Installation
      • Installs on the Passenger Side
      • Fits 2011-2017 GT, Boss 302 and 2015-2020 GT350 Mustangs


      Reduce Sludge. Make the most of your time on the track by preventing performance robbing blow-by from lining your engine in sludge with the Oil-Air Separator. Specifically designed for the Coyote or Voodoo engine, this separator boasts an OE look for a clean look without compromising function. It installs in your coyote's PCV line to filter out oil vapor from your crankcase exhaust that can easily gum up your throttle and intake or end in engine sludge.

      High Quality. This Air-Oil Separator is precision molded for custom fit and durability. It features a unique filter media to separate oil vapor from your Mustang's PCV system. Highly engineered for a factory look and fit, this kit includes OEM hoses as well as fittings, providing superior quality and lasting performance.

      Easy Installation. This kit is designed as a direct fit for your 5.0L Coyote or 5.2L Voodoo engine and requires no modification to your factory equipment for use. Fully plug and play, this kit includes easy to use push pins and OE fittings for a quick and painless upgrade.

      Application. This Ford Performance Oil-Air Separator is specifically designed for use on 2011 to 2017 5.0L Mustangs and 2015-2020 GT350 Mustangs. Not intended for use on highways or public roads.

      Please Note. This Oil-Air Separator is not designed to be used on Mustangs with the Ford Performance Power Pack 2, part# M-9603-M8A, due to the Throttle Body stack up/alignment.

      Technical Note. This part has been designed and is intended for off-highway application only. Installation of this part on a vehicle that is driven on public roads may violate U.S. and Canadian laws and regulations relating to emission requirements and motor vehicle safety standards.

      Fitment: 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

      MPN# M-6766-A50

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (100+)

      Write a Review

      Ratings Summary

      4.7 out of 5 overall rating from 100+ customers

      Installation Time: Less than 1 Hour

      • February 29, 2020

        5 2017 GT350 - SuperMark Installation Time: Less than 1 Hour

        Factory Looks and Works

        Fit perfectly looks like it belongs keep the nanny state from not letting you pass smog

        Helpful (0)
      • February 27, 2020

        4 2012 GT - BruceG Installation Time: Less than 1 Hour

        2012 gt

        Just had it installed so far so good I like the looks of it

        Helpful (0)
      • February 13, 2020

        5 2017 GT350 - Hotchkiss Installation Time: Less than 1 Hour

        Oil/air separator

        Great product, easy to install, works like a champ

        Helpful (0)
      • February 03, 2020

        5 2017 GT350 - JasonBelt Installation Time: Less than 1 Hour

        Great product must have for any Voodo

        Great product easy install and a great insurance mechanism to protect your car.

        Helpful (0)
      • January 31, 2020

        5 2011 GT - Mike Installation Time: Less than 1 Hour

        OEM Quality

        Install of this part went as expected. OEM fit/finish. I did have to remove my strut tower brace to get the engine cover off to complete the installation. It is mounted very solid in place; with one minor concern. The coolant reservoir hose is tight against the body of the oil/air separator. I moved the factory coolant hose protective sleeve to give a layer of protection. I'm not worried about it, but will keep an eye on it for possible wear. Overall; good part, good fit; should do the job as advertised.

        Helpful (0)
      • January 23, 2020

        5 2014 GT - PedroL Installation Time: Less than 1 Hour

        Excellent product

        This oil catch can fit perfect and was very easy to install. The install took less than 5 minutes and it looks like an oem part. I highly recommend this product.

        Helpful (0)
      • January 07, 2020

        5 2017 GT - Brad082781 Installation Time: Less than 1 Hour


        Easy install, looks clean. Glad I went with the FP catch can.

        Helpful (0)
      • January 01, 2020

        5 2014 GT - Dan Installation Time: Less than 1 Hour

        We have separation!

        The Ford Performance oil seperator looks like a stock piece when installed. The fit was great and it took less than 5 minutes to install. I been wanting one for a long time and got this for Christmas. Very nice piece and I know I can trust performance from Ford Performance!

        Helpful (0)
      • December 31, 2019

        5 2012 GT - Geoff01 Installation Time: Less than 1 Hour

        Looks factory

        Item arrived quickly. Good price and looks factory. Great.

        Helpful (0)
      • December 30, 2019

        5 2017 GT - DanielB Installation Time: Less than 1 Hour

        Slick Piece, well madd

        Install couldn’t have been easier (10mins). Only thing I didn’t like was it doesn’t account for the plastic wire holder that you originally cut. I added a zip tie to hold it but this is a minor gripe. Guys, it easily drains. There’s tons of videos on this as you can disconnect the tubes or unbolt the top cap and use a plastic syringe.

        Helpful (0)

      Questions & Answers (27 answers)

      5 Top Rated Questions

      I see some manufacturers have a separator for passenger and drivers side, and some like the Ford Performance have only for passenger side. To truly get the benefit on Oil separation, don't you need to have one for each side? Thanks in advance.

      • The Ford Performance Oil-Air Separator and many others are designed for the Passenger side, as this is where the majority of oil is pulled through. Some manufacturers offer a driver side separator as well for a complete setup, however the driver side will collect less oil.

      Helpful (6)

      Does this fit with the Ford Performance Power Pack 2 installed? On fords website it says it will not fit properly due to the larger throttle body, just wanted to see if you tried it.

      • No, this would have clearance issues when coupled with the larger throttle body and would require modification to work.

      Helpful (3)

      Once this separator is filled with oil, do you empty it or dispose the entire separator? Also, why can't this be used on public highways and the other aftermarket (JLT) separators are allowed on public roads? Thanks.

      • It alters the way the engine, which has been emissions tested, processes something the affects emissions. In this case, it removes oil which no longer burns in the engine and so, one would assume, actually makes the engine burn cleaner, not dirtier. But the way testing works, they need to get the whole thing recertified. Which is expensive. So they don't bother and then declare it's for off highway use only... knowing full well that most people will buy it for on highway use. Why do Ford call theirs out as for Off Highway Use while others don't? Because Ford have lawyers who scrutinize such things and make them while the smaller after market makers either don't have the lawyers, don't know to ask the lawyers or don't think it's a big enough issue to worry about. Being Ford's size makes you a lot more of a target.

      Helpful (3) Show 1 more answer

      I have and RS3 will this work with the supercharger and will it still pass state testing?

      • The Ford Performance Oil-Air Separator will not work with a Roush Supercharger. Legality for your state emissions program will depend on the individual state.

      Helpful (2)

      How often do you have to change the filter part of this separator?

      • Maintenance on the Ford Performance Oil-Air Separator is based on the type of driving the vehicle is subjected to, track type driving will require more frequent checks for an accumulation of oil in the separator but it is recommended to empty it every oil change with normal highway driving. The filter doesn't need to be changed just emptied. Simply remove separator and tilt so to empty oil out from the lower fitting. Do not empty from upper fitting!

      Helpful (2)
      10 More Questions
      I installed a Vortech V3 kit on my Mustang GT 13. Does this oil separator fit on my Mustang or is there an alternative for example driver's side? 0 answer
      Can this be used on a stock 2012 5.0? 1 answer
      Since this won’t for a 2018-2019, When will you have the M-6766-A50A for the 2018-2019 mustang? Can you modify this to fit the ‘18-‘19. 0 answer
      what push pin does this use? 1 answer
      Will this and the driver's side oil separator fit my 2018 GT350? Also, I see people commenting the driver's side oil separator is not necessary due to the low volume of oil flow. Do you know the truth on this? 0 answer
      Will this fit on a 2019 Mustang GT Performance Package 1? 1 answer
      What sort of modification is required to make this fit with the Power Pack 2? 1 answer
      Do they make one for the driver side on a 2013 GT? I would like to install both. 1 answer
      Regarding the "offroad" disclaimer and to others asking inspection questions. What's the verdict? I want to protect my car from "dirtier" combustion overtime, but why wouldn't it pass inspection? A "your engine burns too clean" fine or something? Or more like "this piece over here, even if it makes combustion cleaner, didn't come with the engine" fine. 1 answer
      It appears this catch can will not work if you have a blower on it. Can you recommend one that will fit? I have a 15GT with a Whipple on it. The benefits of a catch can are great. Too bad all Mfgs. don't include one as standard equipment 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Oil Separator
      • (2) Hoses
      • (2) Push Pins

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