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Moroso Air/Oil Separator (96-04 GT)

AmericanMuscle no longer carries the Moroso Air/Oil Separator (96-04 GT). Please check out Mustang Air, Oil, and Fuel Filters for an updated selection.

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: Details

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Tank
  • (2) Brackets
  • (4) Fittings
  • Hose
  • Hardware
Installation Info
Tech Specs
Will it fit my Mustang?

    Customer Photos (22) Submit Your Photo

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      Questions & Answers (6)

      5 Top Rated Questions

      Why can't this be used on a Mach 1?

      • Due to the Mach 1's 4V motor, this Moroso Air/Oil Separator will not fit. This is only intended for installation on the 96'-04' Mustang GT's due to the 2V motors.

      Helpful (0)

      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?

      • The Moroso Air/Oil Separator will install in line with the PCV valve to catch any oil pushed through. On vehicles with two PCV valves, its is recommended, but not necessary to install this on both sides.

      Helpful (0)

      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)
      Post Your Question
      1 More Question
      what is the purpose of the bottom outlet? I installed this on my 00 GT this morning, just wondering what that piece is for. 3 answers

        Customer Reviews (27) Write a Review

        Overall Rating 4.6

        out of 5 stars

        • 5/5

          May 20, 2019

          Worth having a quality piece

          I bought a cheap oil can off eBay and I started to have idle problems. After screwing around changing throttle botties, sensors IAC. I thought the cheap catch can might be leaking, I always had spot's of oil that leaked wherever I parked, so I thought maybe it was a vacuum leak. Replace with this and the car runs perfect. I spent a ridiculous amount of money just because of a 20.00 catch can. Quality matters!!!!


          Year: 1996 Submodel: GT

          Helpful (0)

        • 4/5

          October 15, 2018

          Badass mustang

          Building a pro charged show car. This part was exceptional. Perfect


          Year: 2000 Submodel: GT

          Helpful (1)

        • 5/5

          September 23, 2018

          No sludge

          This is just what you need to keep the sludge from your engine it is well made and easy to install five star rating from me


          Year: 2004 Submodel: GT

          Helpful (2)

        • 5/5

          August 22, 2018


          What you expect from a morose product, precision and quality. I would suggest buying this product


          Year: 2003 Submodel: GT

          Helpful (2)

        • 5/5

          August 08, 2018


          Omg I got another one of these somewhere wasnt the best quality but once I got mine from ur shop wow amazing no problems @ all any more thank you


          Year: 2002 Submodel: GT

          Helpful (2)

        • 5/5

          July 10, 2018


          Was getting oil blow....this air/oil separater worked extremely good.


          Year: 2000 Submodel: GT

          Helpful (3)

        • 2/5

          May 06, 2018

          Great Product but needs extra lines and fittings

          I seen a couple other reviews say this but I wanna say it too. Im giving this product 2 stars only because its made for 96-04 and on the older models you need a 3/8 hose and a 3/8 to 1/2 adaptor for the hoses. Don't advertise this for the older models if you don't send the right parts to install it. Overall it looks great and is a great product. Get it right Moroso.


          Year: 1996 Submodel: GT

          Helpful (5)

        • 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 (8)

        • 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 (7)

        • 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 (7)

        • 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 (8)

        • 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 (8)

        • 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 (7)

        • 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 (7)

        • 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 (8)

        • 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 (6)

        • 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 (8)

        • 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 (8)

        • 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 (9)

        • 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 (8)

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