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Mishimoto Down Pipe - Catted (15-19 EcoBoost)

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    Features, Video & Details

    • Mishimoto Catted Down Pipe
    • Increases of 65 RWHP and 108 RWTQ with a Tune
    • Aggressive Exhaust Note
    • Free Flowing 3" Diameter Mandrel-Bent Tubing
    • 304 Stainless Steel Construction
    • High Flow Catalytic Converter
    • Additional O2 Bung - Ideal for Adding a Wideband Sensor
    • Includes 3" to 2.25" Step Down Adapter
    • Computer Tune is Required for Operation
    • Intended For Off-Road, Track Use Only
    • Is NOT CARB Certified
    • Compatible with Factory or Aftermarket Cat-Back Systems
    • Fits 2015-2019 2.3L EcoBoost Mustangs

    Review & Installation Video

    Review & Install Video

    Hey guys, Stephanie with AmericanMuscle.com here with this Mishimoto downpipe that's available for all 2015 and up EcoBoost Mustangs. The Mishimoto downpipe is going to be for the EcoBoost owners who are looking for a stainless steel downpipe to replace the restrictive factory downpipe. This is a catted downpipe that allows for a factory or factory-like catback setup. The whole point of an aftermarket downpipe is to relieve some of the restriction around the turbo, because from factory it's pretty constricting. Opening up some of the air flow from the turbo can give some nice performance improvements. Basically when it comes to the turbo, if you're looking for performance, you're pretty much going to want air flow as unrestricted as possible so the turbo can spool quickly. The faster the turbo can spool, the more gains that you'll see. Taking a closer look at this downpipe here, it's a full three inch 304 stainless steel mandrel bent pipe with an optional step down. To break that down some, stainless steel is always going to be nice for exhaust components. You won't have to worry about corrosion with the Mishimoto downpipe. The idea behind mandrel bending is to get smoother exhaust flow. Smoother exhaust flow means more power and better performance. The step down is optional, which is great. If you run the adaptor, it's going to reduce the three inch down to a two and a quarter inch which leaves the option of keeping a stock catback or running an aftermarket two and a quarter inch one. Or, you can pair the downpipe with a three inch catback now or even down the road some. That means you can pick up the downpipe for some performance gains without having to purchase a complete new catback while you're at it unless you want to. Then you have some room to grow and the ability to upgrade in stages. A three inch downpipe is definitely going to be larger than the factory downpipe, which means that you are upgrading here. You're going to notice a difference when you compare the factory downpipe to this one here. This particular downpipe has a high flow cat, but if you're looking to get around that cat, Mishimoto does offer a downpipe that comes noncatted which is going to cost a little less than the catted version here which is typical to see in all exhausts. If you pick up the uncatted version of this downpipe then it's going to be even less restrictive than the catted version. Like I said, this is a high flow cat which means that it is more free flowing than the factory cat is. Even though the main idea behind an aftermarket downpipe is to help give the turbo unhindered air flow, swapping out your factory downpipe is also going to give you more sound, too, especially if you're running the uncatted version. You'll hear a lot more turbo noise and get more of that turbo four cylinder sound. Also, be sure to keep in mind that a computer tune will be required to run either the catted or the off road version of this downpipe, so it is going to be necessary to tune for this downpipe. Even if you are going with the catted version of any downpipe, it's always recommended to run a tune, especially if you want to be able to realize the full power potential behind upgrading your downpipe. Another nice thing about this downpipe is that it actually has the 302 bungs. This gives you room for the two O2 sensors and then another spot for a wide band as well which is always going to be a good idea when you start playing around with custom tunes and additional boost. This is a two piece design that comes with a floating two bolt flange, a slip joint connector, and a V band flange. It doesn't get any nicer than a good old V band. If you take a look here, you'll see that Mishimoto designed the downpipe to put the flex pipe in more of a horizontal position instead of a vertical one like some other brands do. What I've noticed with the downpipe offerings across all brands, at least at this point in time, is that generally speaking the higher end players like Kooks and CPE share the same ideas Mishimoto does here, while the less expensive options like BBK have the flex pipe vertically positioned. This is just a little food for thought. Pair that with the knowledge of the two three and it's firing order. When we look at price, the catted Mishimoto downpipe is pretty much right in the middle of the pack. It costs between $500 and $550 which is less expensive than Kooks, Stainless Works and CPE, but a little bit higher price than BBK. The offroad version is about $100 less. There are more options as far as brands with offroad downpipes. Mishimoto is still right around the middle of the pack there, too. When it comes to the install, luckily this isn't a bad one. You're probably looking at a few hours to get everything done. I'm going to call it a one out of three wrenches on the scale. This is obviously going to be easier to do on a lift, but of course you can get the job done using a jack and stands if you don't have access to one. You won't need anything out of the ordinary, just a few sockets, wrenches and a short extension. You're going to be removing the front and rear O2s for the install and swapping them over to the new downpipe. I'd just unclip and leave them in the factory downpipe and switch them after you get the old pipe out. This way you won't be twisting wires and it'll make for a faster install. You're going to be reusing the gasket from the turbo outlet, so don't forget to make sure to grab the factory downpipe gasket before installing the new downpipe, since sometimes the gasket can stick to the turbo. The third bung comes plugged, so if you're going to use it just remove the plug and put in your wideband sensor. If you're not ready for this yet, then just make sure that the plug is tight before you install the pipe. It's going to be easier to install the pipe in sections starting with the first section with the O2 sensors. Then, move on to the second section and insert the adapter, if you're going to use it, and through your reband on. The only other thing I'd say is to line the new downpipe up first before tightening everything down, but that's about it. So, only a few bolts and about two hours time for the install. Overall, the Mishimoto downpipe is a three inch stainless steel downpipe that can work with either a three inch catback or it can step down to work with a two and a quarter inch catback. You have a choice between either catted or noncatted depending on what you're looking for. Not only is this going to increase performance, but it's also going to open up some sound on the EcoBoost as well. You can check this out more online for yourself and see what you think. I'm Stephanie, and for all things Mustang keep it right here at AmericanMuscle.com.

    More Power And Performance. Release all the hidden horse power and torque your Turbocharged 2.3L EcoBoost Mustang has to offer with a Mishimoto 3" Performance Catted Down Pipe. Mishitmoto has seen dyno proven power gains of 65 horse power and 108 foot pounds of torque at the rear wheels with a custom tune.

    More Aggressive Sound. A Mishimoto Down Pipe not only helps improve power and performance of your S550 EcoBoost Mustang, but it also adds a much more aggressive exhaust note when compared to the factory down pipe.

    Stainless Steel Construction. Manufactured from high quality 3" diameter 304 stainless steel tubing for superior strength and corrosion resistance, this Mishimoto Down Pipe features smooth mandrel bends throughout the entire piping to improve exhaust flow for more power and better performance.

    High Flow Cat. Mishimoto includes a high flowing catalytic converter that features a 200 cell spun metallic core that is specifically engineered for maximum flow and surface area, perfect for force inducted applications such as the turbocharged EcoBoost Mustang.

    Three O2 Bungs Built-in. Mishimoto designed their Down Pipe with three O2 bungs to accommodate the two stock O2 sensors as well as to give you the ability to easily add a wideband sensor if so desired.

    Required Upgrade. For proper operation and maximum power potential this Down Pipe will require reprogramming the vehicles computer. AmericanMuscle recommends a Bama custom tune with a Mustang Handheld Tuner to reprogram the vehicles computer (ECU) for proper operation.

    3" to 2.25" Adaptor Included. This Mishimoto Down Pipe can be installed onto an aftermarket 3" catback as well as the factory or an aftermarket 2.25" catback exhaust with the use of the included 3" to 2.25" step-down adapter. This adapter allows you to upgrade your EcoBoost Mustang in stages saving you money.

    Application. This Mishimoto Catted Down Pipe is designed to fit both automatic and manual 2015-2019 EcoBoost Mustang models equipped with the turbocharged 2.3L in-line 4-cylinder engine.

    Technical Note: This Mishimoto product is intended for off road use, and is not legal for use in emission restrictive states.

    Fitment: 2015 2016 2017 2018 2019 Details

    MPN# MMDP-MUS4-15CAT

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    What's in the Box
    • (1) 2-Piece Downpipe
    • (1) High-Flow Catalytic Converter
    • (1) 3.0" Slip Joint Clamp
    • (1) 3.0" V-Band Clamp
    • (1) 3.0" to 2.25" Exhaust Adapter
    Installation Info
    Tech Specs
    Down Pipe Specifications
    Piping Material: 304 Stainless Steel Piping Size: 3" (includes 2.25" step down adapter)
    Catalytic Converter: "Yes" - Intended for off-road use only Type Cat-Back Required: Stock, 2.25" or 3" aftermarket 
    Tune Required  Yes Fitment: 2015-2017 EcoBoost
    Will it fit my Mustang?

      Customer Photos (4) Submit Your Photo

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        Questions & Answers (22)

        5 Top Rated Questions

        Will this downpipe pass Maryland emission inspection?

        • The Mishimoto Down Pipe - Catted (15-17 Ecoboost) will pass any states that are adopting the California Air Resources Board restrictions.

        Helpful (15)

        Was thinking of this downpipe along with an Unleashed Tuning Rev-X Tuner by SCT, but heard I might have CEL (check engine light) problems that Unleashed cannot address??? Especially with a performance cat. Already have the MBRP cat-Back Race Version system....

        • With a proper tune, you shouldn't have any issues as this will still have cats, however there are occasional situations where even high flows will throw a check engine light. If a check engine light is thrown due to having no cats, or high flow cats, due to recent legislation there is nothing that can be done to turn of that CEL. In both scenarios the proper tune will still allow the vehicle to run properly so if you do experience a CEL due to an install like this, if tuned properly, you should have nothing at all to worry about.

        Helpful (1)

        Will this pass Texas emissions test?

        • In can honestly depend on the state and their emission laws as they vary. We recommend checking with your state ordinances or a local shop to confirm.

        Helpful (1)

        If I already have the ford performance tune and CAI installed, can I install this downpipe and then reinstall the tune from scratch so the tune calibrates to the downpipe already being installed?

        • The Ford Performance tune will not support the addition of the downpipe. You will need a custom tune or have the tune revised for the mod.

        Helpful (1)

        If I already have the ford performance tune and CAI, can I install this downpipe and then reinstall the tune from scratch so the tune calibrates to the downpipe already being installed?

        • The Ford Performance tune will not support the addition of the down pipe. You will need a custom tune or have the tune revised for the mod.  

        Helpful (0)
        Post Your Question
        10 More Questions
        Will this downpipe fit Borla ATAK catback exhaust for ecoboost? 1 answer
        Will this fit the MBRP XP Series Cat-Back Exhaust w/ Y-Pipe - Street Version as I noticed it has the optional taper but is not required 1 answer
        If I get the Catted DownPipe, will i still need to get a tune 1 answer
        Is the Mishimoto Down Pipe CARB-certified? 1 answer
        I purchased the Unleashed Rev-X tuner with a custom tune to go with this down pipe. In the descriptions on the Unleashed Rev-X tuner page, it says to restore the factory settings before going into a dealership for warranty work. What are the dangers of operating my car with this down pipe and no custom tune to go with it? 1 answer
        Does the required tune need to be done before or after install of the down pipe? 1 answer
        Why after I installed Mishimoto Down Pipe,go for 7 days the lights up engine warningg , smoke a lot . 1 answer
        Why after I installed Mishimoto Down Pipe, communal gas alarm system? 1 answer
        Will this attach directly to the MBRP cat-back exhaust? 1 answer
        Will this catted downpipe be able to pair with the Borla Atak exhaust? If So, will it be able to pass through emission tests and is legal/Will not void warranty? I live in California 1 answer

          Customer Reviews (17) Write a Review

          Overall Rating 4.4

          out of 5 stars

          Installation Time:Afternoon

          Installation Cost:$100-$250

          • Loudness / Volume 4.1875 4.2
          • Exhaust Note 4.5625 4.6
          • Fit & Finish 4.5 4.5
          • Bang For Your Buck 4.375 4.4



          • 5/5

            Installation Time: Afternoon

            July 17, 2019

            Sounds great!

            Works great with my Magnaflow street series catback system. You must get a tune with the high flow cat pipe. If not your light will come on. Besides that you want to get all the power performance that you can. With larger intercooler, pipes and a tune I got an extra 110 more torque.

            Travis

            Year: 2016 Submodel: EcoBoost

            Helpful (0)

          • 4/5

            Installation Time: Less than 1 Hour

            June 02, 2019

            Nice product

            The installation was super easy because of the stock location of the downpipe and the amount of room you have to work with. It is literally just unbolt the old one and bolt on the new part. The only part I did not like is that yes it has an adapter that goes to a stock catback exhaust but it does not have the ability to just go straight to 3 inch which is dumb I thought because then you have to buy an additional part or have one made. But overall quality of the part is nice.

            Will162

            Year: 2018 Submodel: EcoBoost

            Helpful (0)

          • 3/5

            Installation Time: Afternoon

            December 18, 2018

            Nice but...

            It's nicely made but the dang thing didn't come with the bolts to bolt onto the turbo. Shop is currently trying to now make custom bolts because the ones on the turbo will not come off apparently. Had to leave my car at the shop and now wonder if I can trust that the connection will be right. Unfortunate but will see how it holds up. Would be so much easier with bolts being supplied to mount onto the turbo.

            JeremyF

            Year: 2015 Submodel: EcoBoost

            Helpful (3)

          • 4/5

            Installation Time: Full Day

            November 13, 2018

            Hardest Install Ever

            This product was manufactured beautifully. But due to ford OEM parts and bolts, your best bet is to try and get this part put in as soon as you can after you purchase the car. I've had my car for about two years now, and having to remove the bolts from the turbo flange broke in half and it was the biggest pain in the butt. I had to take it in to a shop where they spent almost all day to take off the bolts and old downpipes.. they had to basically weld this downpipe onto the turbo because of how the old bolts left the turbo bolted holes. after a little trial and error and exhaust leak fixes, it does what its intended to do. Just sucks when the check engine light comes on and I have to continuously remove it with my tuner (Tuners can no longer block the O2 sensor from coming on for having an aftermarket down pipe). Overall, if done correctly, this delivers some serious power gains.

            Franco

            Year: 2015 Submodel: EcoBoost

            Helpful (2)

          • 5/5

            Installation Time: Afternoon

            November 17, 2017

            AMAZING!

            This catted downpipe is is just what my ecoboost mustang needed! I paired it with a KandN cai and a SCT tune with a custom tune from Unleashed Tuning. I definitely recommend this downpipe to anyone looking for more power!

            OrlondoA

            Year: 2015 Submodel: EcoBoost

            Helpful (5)

          • 1/5

            Installation Time: Afternoon

            October 15, 2017

            Can’t pass emissions test.

            Before warned this down pipe plus Bama Performance will not pass emissions test.

            Dedede69

            Year: 2016 Submodel: EcoBoost

            Helpful (8)

          • 4/5

            Installation Time: Afternoon

            September 12, 2017

            Great Downpipe

            I had a bit of trouble fitting the pipe into the turbo but that was more my own fault since I did the install myself on jack stands but the other than that the install was straight forward, the pipe looked good with not damage and good welds. Once all the bolts and nuts were secured, I put my Unleashed tune into the car and wow did the car feel different. I noticed more power and torque and with all my other mods, I could hear the turbo whistle and exhaust being loud and mean. The fitment was good and after putting over 5K miles on it since the install, it was still working like it should. I recommend this downpipe as a good way to unleash more power from the EcoBoost

            IzzyBlackS550

            Year: 2015 Submodel: GT

            Helpful (5)

          • 5/5

            Installation Time: Afternoon

            July 24, 2017

            Sounds Awesome!

            I love the downpipe! The car sounds much deeper and paired with the MBRP race catback its loud and mean! An issue was some damage when I received the pipe and the lack of support from AM and Mishimoto. Had to get it repaired and then installed.

            BrandonH

            Year: 2016 Submodel: EcoBoost

            Helpful (6)

          • 3/5

            Installation Time: Afternoon

            July 03, 2017

            Excellent except for...

            Went with the Mishimoto downpipe because of a lot of positive experience with their other products. Fit and finish top notch with everything machine perfectly. Exhaust note took on a deep rasp - not in a bad way either. No real exhaust note changes below 2500 rpm; over that and you hear it! Nice. Here comes the rub. The mating point for the downpipe to the catbacks has a flanged end. You can either 1) run as Mishi pipe as designed and have your 3" pipe reduce down to the 2.25" joiner or 2) buy the Mishimoto exhaust adapter so you can run 3" all the way back for another $85. Mishi adapter "may" work with other catbacks but warnings it may not are plentiful. I'm not bashing Mishi but that one proprietary flange put me in a position to have to drop another hundred to get 3" exhaust. Sort of like buying a car and being told afterwards the windshield wasn't included. Mishi quality is excellent but if I had it to do over, I would have gone with the Corsa or the Kooks downpipe.

            DeanBarker

            Year: 2016 Submodel: EcoBoost

            Helpful (7)

          • 5/5

            Installation Time: Afternoon

            March 01, 2017

            Excellent product.

            I purchased this for my ecoboost, with an SCT tune. Brought out a really nice note with muffler deletes, and left resonator in place. HP is considerably greater. Giving the GT's a run for the money. Keep right up with the GT stock. Install took approximately 2 hrs.

            Fig

            Year: 2016 Submodel: EcoBoost

            Helpful (4)

          • 5/5

            Installation Time: Afternoon

            February 10, 2017

            Good sound

            I like the sound which is not loud but deep and noticeable. To gain the maximum power of this part you need a tune. Without a tune, you won't gain much HP but still the sound is different

            Talaat

            Year: 2015 Submodel: EcoBoost

            Helpful (5)

          • 5/5

            Installation Time: Less than 1 Hour

            September 30, 2016

            Mishimoto Catted Down Pipe AMAZING!!!!!!

            Install took about 40 mins. Very easy if you have the right tools. I previously put the MBRP Race exhaust on and it had the bass but i wanted the aggressive sound with it. Started it up and wow right away i noticed the volume change and girthy explosive sound.

            Greg

            Year: 2016 Submodel: Ecoboost

            Helpful (6)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: 0-$100

            September 19, 2016

            amazing results

            I researched this downpipe very thoroughly then decided to purchase it and have a muffler shop install it. Before this downpipe i had a jlt intake and unleashed tune on my 2016 ecoboost mustang. They woke up the car pretty good. After the downpipe installation and tunes from unleahed the car is a beast. It really pulls hard at bottom end and at highway speeds which it hits in a hurry, it opens up hard even at half throttle. This is a great product. It is almost as fast as my 2013 5.0 now.

            Changofeo

            Year: 2016 Submodel: Ecoboost

            Helpful (5)

          • 5/5

            September 05, 2016

            Power!!

            Instant notice power gains. Noticeable change in the loudness.

            OG

            Year: 2015 Submodel: Ecoboost

            Helpful (5)

          • 5/5

            Installation Time: Afternoon

            June 09, 2016

            A must for your mustang

            This product provides a dramatic increase in performance, plus gives your car some extra growl. It's not gonna fix the exhaust notes but is still a noticeable improvement. I very much recommend it.

            Timothy

            Year: 2016 Submodel: Ecoboost

            Helpful (5)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            June 08, 2016

            Mishimoto Downpipes - Ecoboost

            Tremendous performance! I am impressed with the combination of my Rousch Cold Air Intake, MBRP Street Catback Exhaust and Mishimoto Catted Downpipe!! Unbelievable sound and aggressive performance with the Bama X4 Tuner.

            Rookie

            Year: 2015 Submodel: Ecoboost

            Helpful (7)

          • 5/5

            Installation Time: Afternoon

            March 03, 2016

            More power

            Easy to install, you can tell the difference in power and sound, the car is much more aggressive and with Bama performance tune it's a blast, highly recommended!

            Stangcr

            Year: 2015 Submodel: Ecoboost

            Helpful (5)

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