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Moroso Air/Oil Separator (96-04 GT)

Market Price $162.99 You Save 12% ($19.35)
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  • Item 14447
  • MPN# 85486

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Features & Details

  • Reduces Engine Sludge
  • Polished Billet Aluminum Housing
  • Includes 54" Rubber Hose and Fittings
  • Easy Installation
  • Fits 1996-2004 Mustang GT
Reduce Sludge. Reduce engine sludge in your 4.6 by diverting nasty "blow-by" (a combination of exhaust gases and oil) into a Moroso Air/Oil Separator a.k.a. "catch can" where the contaminated oil is separated out from the exhaust gases before being recycled back into the intake to be re-burned, thus preventing the used oil from re-enter the system to gum up your engine.

Superior Quality Materials. The body of this Moroso Air/Oil Catch is constructed from billet aluminum for strength and has a polished finished to complement your Mustangs engine compartment. The Moroso separator features 1/2" inlet and outlet fittings, and includes a 54" length of 1/2" rubber hose.

Application. This Moroso Air Oil Separator is specifically designed to fit the 1996 to 2004 GT and Bullitt Mustangs with the 2 valve 4.6L modular engine.

Fitment: 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (1) Tank
  • (2) Brackets
  • (4) Fittings
  • Hose
  • Hardware
Installation Info
Tech Specs
Will it fit my Mustang?
  • Bullitt - 01
  • GT - 96, 97, 98, 99, 00, 01, 02, 03, 04

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Most Helpful Reviews

Great product does what it says

I bought the moroso air separator because its a direct fit for the engine and it looks great in the engine bay. I was very shocked on how well it's made. Very easy to install and well worth the price. ...

Read More
Helpful (4)

Stop Burning oil

Called in to learn more about the product. Knew I needed it after taking my intake out and seeing oil pooling at the bottom of the manifold. Moroso's oil air separator has a release valve to release oil ...

Read More
Helpful (4)

Overall Rating 4.6 out of 5 stars
Read All 20 Reviews

Customer Photos (21) Submit Your Photo

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5 Questions / 6 Answers

Ask a Question

Wouldnt you need two of these, one for each side of valve cover pcv since this will only cover 1 side at a time? Or is one enough?


I have a 96 GT with a SR CAI. Do I connect one of the hoses to the CAI or the to the plenum/manifold intake?


  • The Moroso Air/Oil Separator (96-04 GT) will connect to the PCV on the intake tube. If you follow the link below, it will have detailed instructions on how to install this Air/Oil Separator.


Helpful (0)

Which side of the engine should this be used on? Seems like most of these photos have the separator attached to the passenger PCV, does that side tend to vent more vapor? I have no intention of buying 2 of these


  • The Moroso Air/Oil Separator (96-04 GT) can be installed on either the driver side or passenger side. One side will not vent more than the other. Some Customer Submitted Photo's feature a Mustang with a centrifugal supercharger on the passenger side. This is taking up space for the Air/Oil Separator, so it must be moved to the driver's side. You can install this Air/Oil Separator on whatever side you like.


Helpful (0)

Can I use this? I dont have an EGR on my mustang. Do I need this still? I understand that it uses the exhaust but since I don't have an EGR anymore I shouldn't need it right?


  • This air/oil separator does not involve the exhaust at all. This goes inline between the PCV valve and intake plenum. You could definitely use this air/oil separator.


Helpful (0)

what is the purpose of the bottom outlet? I installed this on my 00 GT this morning, just wondering what that piece is for.


  • The bottom portion of this air/oil separator is actually the draining elbow and opening valve. Hope this helps!


Show 2 more answers Helpful (0)

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Customer Reviews (20) Write a Review

Overall Rating 4.6

out of 5 stars

  • 5/5

    March 23, 2012

    Great product does what it says

    I bought the moroso air separator because its a direct fit for the engine and it looks great in the engine bay. I was very shocked on how well it's made. Very easy to install and well worth the price. A must for any turbo or supercharger mustang.


    Year: 2002 Submodel: GT LONG ISLAND

    Helpful (4)

  • 5/5

    March 23, 2012

    Stop Burning oil

    Called in to learn more about the product. Knew I needed it after taking my intake out and seeing oil pooling at the bottom of the manifold. Moroso's oil air separator has a release valve to release oil in the catch can and avoids messes. Took about 30 minutes to plug everything in place. Car runs smooth and after removing plenum 2 weeks later no oil in the intake. Moroso makes a great product and American Muscle delivers it fast.


    Year: 2003 Submodel: GT Independence, KY

    Helpful (4)

  • 5/5

    January 27, 2012

    Quality product with an easy install that does exactly what it says.

    I have a 2002 Mustang 4.6L 2V. I wanted to reduce the amount of blow by and gunk in the upper intake and decided that I would try the Moroso Air/Oil Separator as they had just released a bracket to fit my year and make. When I received the package it was very well put together, the quality of the air/oil separator as well as all hoses and mounting accessories is excellent. Furthermore, the install was a very simple and did not require any special tools other than a screwdriver and wrench with attachments. The install took about 45 minutes and looks extremely clean in the engine bay. As for the actual functionality of the with almost everything else from this company it does what it says. After about 400-600km of driving I decided to empty it and sure enough out came a thick, foul smelling, black oil. Additionally, there is almost no gunk or oil buildup where the hose from the separator enters the intake meaning that the air/oil separator is effectively doing its job. This product will be even more useful to me once I have completed my forced induction setup.


    Year: 2002 Submodel: Other Ottawa, ON

    Helpful (3)

  • 5/5

    February 25, 2017

    No more blow by!!

    I am very pleased and satisfied with Moroso separator. It looks good under my engine bay. And I feel more at eased knowing that I have it installed on my car to catch any blow by. Due to having the sn95 1998 mustang gt I had to have it installed on the side in front of my strut tower but I still have room to install the strut tower brace. Thank you again American Muscle for another quality product


    Year: 1998 Submodel: GT

    Helpful (2)

  • 3/5

    June 19, 2016

    Didn't fit

    Does not fit 96 gt because of the coils. Need to find another spot. Seems like a well made product though.


    Year: 1996 Submodel: GT

    Helpful (2)

  • 5/5

    April 19, 2013

    works very well

    had to change some of the parts on this to make it work for my cobra but its working great now! very happy with this product. less smoke out the tail pipes.


    Year: 1996 Submodel: Cobra PA

    Helpful (2)

  • 5/5

    March 09, 2013

    Keep it clean

    Great product! The fit and finish is very nice. Installation instructions are straight forward. I would recommend this product for all mustang owners, including all supercharged mustangs. It will help to keep oil from contaminating your intercooler and Intake manifold. It helps to reduce engine oil sludge and keeps your engine clean. I used A/N hose fittings to complete the installation. Best of all this product is made in the USA.


    Year: 2002 Submodel: Other Honolulu, HI, USA

    Helpful (2)

  • 5/5

    July 27, 2012

    Great Quality, Great fit

    First off, This is a really nice product. Quality and all. It fit in the engine bay and really looks good. It took me roughly an hour to install but that was due to a couple slight issues I came across. I have an '04 GT, and I don't know if it makes much of a difference but I think it did. I had to route the tubes much differently than showed in the directions to install this into the car. Also, I believe they made a mistake with the amount of 1/2"-5/8" couplings included. There should be 2 of them included. I had to reuse the stock pcv tube as a coupling because there was no other coupling included. Another thing is that the lengths to the tubing were way too long no matter how you bent them so I had to wing the cuts to the tubes to my own lengths to fit properly. To me, these weren't major issues because now my air/oil separator looks a bit cleaner and different than other people's. Overall I still give it 5 stars, the only thing I would add is another coupling to only use the tubing included in the box rather than reuse the pcv tube. Also, Thank you American Muscle for the one day shipping. I ordered it yesterday morning and got it the next day.


    Year: 2004 Submodel: GT

    Helpful (2)

  • 4/5

    May 20, 2017

    Great Idea

    Any time you pull an intake, you'll see lots of oil clinging to the inside surfaces. Anything that reduces this buildup has to be a good idea.


    Year: 2004 Submodel: GT

    Helpful (1)

  • 5/5

    March 17, 2017

    97,mustang gt build

    the air/oil separator works great easy to install took about 30 minutes thanks am.


    Year: 1997 Submodel: GT

    Helpful (1)

  • 4/5

    March 15, 2015

    Keep blow-by out of your engine

    Great product looks great under hood and cleans up your motor.


    Year: 2003 Submodel: GT Victoria, TX

    Helpful (1)

  • 5/5

    June 06, 2013


    The quality of the product is apparent as soon as it is out of the box. Installation is simple enough, and this product functions just as promised. Very please and I would certainly purchase this part again.


    Year: 2002 Submodel: GT Wilmington, NC

    Helpful (1)

  • 5/5

    July 27, 2012

    Quality Air/Oil seperator

    Bought this Air/Oil seperator for my custom 3.8 L Supercharged Mustang. This unit will look exceptional in the engine bay and eliminate the Oil collection issue in the supercharger plumbing.


    Year: 1995 Submodel: V6 Grapevine TX

    Helpful (1)

  • 5/5

    January 11, 2012

    Very nice

    Looks and fits perfect, looks like it came stock with it. Would buy again


    Year: 2003 Submodel: GT Acworth

    Helpful (1)

  • 4/5

    December 11, 2011

    Good craftsmanship

    Moroso makes it easy to add a catch can to your PVC system with this piece. Good place to mount the can and better than a vented setup to keep the engine bay cleaner.


    Year: 2001 Submodel: GT Kansas

    Helpful (1)

  • 4/5

    September 22, 2017

    Product works as advertised

    The reason I'm giving this a 4 out of 5 is because there was a lack of parts needed for a 1996 Mustang Gt. Not only did I have to make up my own locstion, but the stock hoses did not fit on any of the corresponding hoses. I needed to buy 2 fittings to downsize hose size in order to work. I first had this product on the passenger fender side barely able to fit with cold air intake. Once I switched over to SR intake, it no longer fit over there so I was able to find a spot underneath my ignition coils. It is no longer on top to see easily but it functions just fine. If there was an easier way to install out of box, this would be a 5 out of 5 as the product itself is very appealing and works as asvertised. Also, Moroso apologized for inconvenience and I hope they can work on getting a full out of box bolt on kit. Recommend to anyone and if you have a sn95 like me, probably 96-98, then I would suggest getting a couple of the fittings beforehand. I used downsize adapter for pcv valve and for the vacuum line next to IAC valve.


    Year: 1996 Submodel: GT

    Helpful (0)

  • 3/5

    September 03, 2017


    Is a good product easy to install and gives a better view of the engine


    Year: 2001 Submodel: GT

    Helpful (0)

  • 5/5

    July 27, 2017

    LOVE IT!

    Had to find my own spot to place it in my GT, but once I did, it looks great!


    Year: 1996 Submodel: GT

    Helpful (0)

  • 5/5

    March 10, 2017

    Helpful part

    Easy install and seems to have significantly reduced the dreaded silver smoke.....a bit pricey but moroso always gives you your money's worth........


    Year: 2003 Submodel: GT

    Helpful (0)

  • 5/5

    August 18, 2011

    great product

    very high quality product, the only problem that I saw with it is that while it is sold to cover 96-04 cars, it only comes with hoses & fittings for the later cars (ie. 1/2" hose & fittings as opposed to the early cars which take 3/8" hose for their pcv system). other than that, nice part.

    Larry Fitzsimmons

    Year: 2000 Submodel: GT

    Helpful (0)

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