2015-2023 Mustang EcoBoost Mishimoto Downpipe 3" High-Flow Catted Stainless Steel Installation

Bill shows you how to install a Mishimoto 3" stainless steel high-flow catted downpipe on your 2015-2023 EcoBoost Mustang. This two-piece downpipe features stainless steel tubing that's mandrel-bent to mount to your 2015-2023 EcoBoost Mustang.
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Check out our how-to guide for written instructions:
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If it's only for 2015-16(per video, why is the ad showing 15-23

[@kameroni636]

I'm not a mechanic nor am I close but I did with the help of your videos install my exhaust and cold air intake myself so you think it would be smart to install this downpipe myself as well? Or should I get a professional?

[@Zerogivengarage]

+Kameroni If you can handle the exhaust I think you will be ok. Making sure the pipe is seated properly on the turbo is the hardest part.

[@amarbesic_]

This is the last mod i need before I am Fbo Stage 3

[@franziskogonzalez1789]

Bruh ts is one of my first mods and I can’t pass smog now so I gotta go back to stock then back again😵‍💫

[@amarbesic_]

@@franziskogonzalez1789 Shit I copped a Bmw m340 I got rid of my eco😭

[@williamhiers6328]

How was the eco when you had it what year?

[@amarbesic_]

@@williamhiers6328 It was a 2020 10 speed and I don’t recommend tuning it I say just go Bmw or get a 5.0 10 speed because once I started making mine pretty quick it started having issues frequently

[@jakeebsen6954]

Would this work with the cobb stage 2 tune?

[@StevenNeidlein]

Good god bill get rid of that resonator :)

[@Keflynn63]

No check engine light?

[@Austin_Powa]

If you ever feel useless just know people use the hanger removal tool 😂

[@CROW_BH11]

what tuner do you recommend thanks

[@kingcalero1088]

Hey was in the middle of installing when I noticed my old pipes are welded onto the mid pipes, is there a solution for this or would I have to go to a professional ?

[@cjponyparts]

I would recommend an exhaust shop at that point.

[@adalucecampos9400]

What’s the best tuner/tuning for this kind of setup. Everything stock j a catted down pipe. I’m thinking of getting it but I don’t want a bad tune or anything

[@goldentaco8251]

Will this affect the remote start

[@nickridley7223]

will this fit on a 2019 with active exhaust?

[@andrewmccolpin5495]

Lol I’m here too with that question

[@graymustang]

have you found out anything just got a hpp Ecoboost with active exhaust

[@deivisv8183]

Yes it will

[@loganjones3172]

I have been wondering this for such a long time now please tell me what that square box looking thing is right before the resonator and what does it do?

[@Sigrafix]

If you're referring to the mesh looking thing on the stock downpipe, I'm pretty sure that's a flex pipe. Just allows the exhaust a little bit of movement between the engine and chassis so that nothing breaks.

[@Starhopper6]

Would it pass smog?

[@parkerduim3282]

will this downpipe work with the mbrp race? I'm having trouble on which downpipes to get. the catback went into the stock clamp connecting the catback and downpipe.

[@3bdl7meddroby10]

Parker Duim did you find an answer ? 3 years later i am the one with the same question you asked lol

[@andyl7899]

The mbrp kit comes with adapter to go from 2.25"-3". Where is yours?

[@yokonovich]

I have the street MBRP and it fits well . The only thing is that rattles I’m trying to find a solution .

[@D33P_4K]

anyone have a part number for the bracket attached to the transmission and downpipe? or where id be able to find one?

[@MyNenii]

I have an aftermarket Exhaust with 3". Will the Mishimoto Downpipe fit to the 3" or only for factory Exhaust ?

[@Zerogivengarage]

+Razedzz If it is a true 3 in you can install without the adapter if it has a flange on the front

[@deanbarker3860]

If you don't have the Mishi type flange thought, I'm assuming you will have to use the adapter and cut it back a bit to get close to the 3". Correct. (Doing install here tomorrow Bill and I appreciate CJ's prices and your videos!)

[@thefuturetellsourpast4570]

I’m looking to install a Catted down pipe and have not thought about a tune for it, I’m looking for slightly more sound more than performance needs. Im wondering if running a downpipe without a tune is dangerous or harmful to the car in any way?

[@yokonovich]

I did that but check engine light comes on That’s why you need a pro tune I don’t know if is harmful to the engine !!

[@thefuturetellsourpast4570]

@@yokonovich I actually ended up putting the catted downpipe on a couple months ago and it gave me a check engine light but it runs fine and honestly probably won’t do anything bad to the engine , id only worry if it doesn’t start 🤷‍♂️ but if anything it made it sound better , I plan on getting a whole new exhaust before getting a tune anyways , I’ve read a lot about mods and it’s seems like some after market parts need tunes and others don’t , also my mechanic friends say it straight 🤷‍♂️

[@yokonovich]

Ok cool because I was like that with the down pipe catted and check engine light on. But I didn’t use the car until I got it tuned on July 8 . So far so good !!!

[@thefuturetellsourpast4570]

@@yokonovich nice!! Definitely a tune in the long run with mods is always probably better ! Just helps everything run smooth with better performance

[@mmonkeyman1403]

No point installing a bigger downpipe if you're not slapping a tune on there.

[@Averlus]

It rattles a lot on the exhaust hanger on mine.

[@yokonovich]

Mine too That’s why I’m reading Did you find a solution?

[@Averlus]

@@yokonovich Yes, actually. I was just thinking about this. I had the fit of the piping adjusted until I got the clearance I needed.

[@yokonovich]

Ok I will try

[@igker]

Installing a downpipe, doesn’t remove the machine from the factory warranty?

[@cjponyparts]

Check with your dealer before adding any performance parts.

[@flacko2x231]

Will it fit with any cat back exhaust ?

[@sedicibrah2025]

Yeah fr I wanna out this shit on my MBRP cat back

[@CoyoteDAworld]

@@sedicibrah2025 yeah , just bought , Im getting it by Tuesday this week. I'll do an video intalls at my brother's shop , also got the mbrp exhaust

[@sedicibrah2025]

@@CoyoteDAworld Sweet man, I have liked my exhaust so far, its not as loud as I wish it was but its good for a little engine like the I4 lol.

[@CoyoteDAworld]

@@sedicibrah2025 yeah bro , my brother has it on his and its nice , videos really don't do justice on this cars exhaust lol but I guess I got an email telling my mishimoto DP it's out of stock from AM , so had to cancel that and order the BBK down pipe , like 60 bucks cheaper too .

[@CoyoteDAworld]

@@sedicibrah2025 also bro I saw this brand JBA in their wedsit wayyyyy cheap like they have some for 180 or even under 120 bucks for some down pipes and tbh I heard they are decent but never did some deep research.

[@mltopvideosworldbest9642]

I guess you don’t need a tuned for this?

[@cjponyparts]

Don't NEED to but you can get more power with a tune.

[@jimmyp3748]

How much does the stock catalytic converter go for a eco boost 2017 ?

[@Am1neee]

alot

[@Titus.S]

Can anyone tell me, please, the code for that gasket between downpipe and turbo housing? Thank you!

[@Jboneice7]

My car is literally in the shop for this right now. After using my friend’s obm2 reader before bringing the car to the dealer, the code for my car that came up was ‘P1070’ which described an ‘air/fuel leak’. Since bringing it to the dealership and running a $205 diagnostic they found out that the gasket connecting the turbo to the engine block had been blown out, hence making my bill $450 after parts and labor. I thought this was quite a bit but after calling my personal mechanic that has worked on my car for years, he quoted me between $580 - $800. After considering the work the dealer mechanic will have to do in terms of taking off the entire turbo replacing the $30 gasket and still only charging me for half the time he put into the car, I considered my bill pretty lenient. Not sure obviously if your car has the same blown gasket that mine does but if so expect a similar price. Hope this helps.

[@Titus.S]

@@Jboneice7 Thank you so much for sharing this to me. In the meantime i've found the part number for the gasket, i bought it (22.5 dollars here in Romania), and tomorrow i'm gonna change it, hopefully for 20-25 dollars in labour. If anyone needs the code for that gasket, here it is: FR3Z5C226A If your mustang is louder than before, if you can hear the turbine much louder, and if exhaust gases escape into the car, than you might need to change this donut gasket.

[@mannya6687]

Do you HAVE to do a tune??

[@cjponyparts]

You do not have to but it is recommended.

[@aarontodor6416]

What spoiler you got on there?

[@slimeslatt5207]

stock

[@nickoliver3223]

What kind of tune is needed?

[@yokonovich]

Pro tune

[@joshpierce0599]

Is this legal? Also I thought it was a carted down pipe but he took the cat out. I’m confused someone help lol

[@E52O4]

It isn’t legal for street use. Installation of non-catted down pipe usually makes car only legal for off street use (race track, drag strip). Check with your state laws.

[@hashimal.7017]

I keep getting the P0240 code. Even after the tune. Any ideas?

[@Zerogivengarage]

+Hashim Al. That's common for high flow cats. I would ask you tuner what changes were made for the downpipe.

[@FreeForAllFreak]

Tune required right?

[@Zerogivengarage]

+Adam Cooper I would highly suggest it

[@treevans-dumaran8136]

Bill Tumas hey Bill what happens if I don’t get a tune? Can I run the cat less downpipe for a month or two and then tune it?

[@socalecos550]

I installed a cat less downpipe on my 2017 ecoboost and it has a engine check light?

[@orbitcurve_227]

All Catless downpipe do that unfortunately if you still have the stock downpipe you can put it on for emissions

[@bobbob-hz5je]

Or just get a tune that eleminates the cel

[@drsauce2574]

cuz its catless and dont have a catalyc converter on it , until you get a tune its gon keep saying cel or you can get the cvfab catless downpipes which solved that issue with a built it defouler so you want need a tune and get CEL code

[@socalecos550]

@@orbitcurve_227 yeah, I saved the stock one just in case

[@socalecos550]

@@bobbob-hz5je yeah, thats exactly, what I did, im protune now lol

[@fernjr108]

What kind of tune does it need

[@Ezduztube]

Hello! Would this fit on a 2018 Ecoboost? Thanks

[@cjponyparts]

Yes it will

[@Ezduztube]

Thanks!

[@AlphaMegaOmega]

Does this require tuning?

[@Austin_Powa]

I have the same question cause I heard it doesn’t but he said it does in this video in the beginning.

[@Dayfloss]

A high-performance single 2.5 inch exhaust system will sound better than a dual exhaust 3.0 inch system on a four-cylinder engine a single exhaust system will make more power and weigh less

[@M16xDr0pSh0tz]

not on a turbo engine... more flow is always better. sound is subjective. The 3 inch will give the deepest sound while 2.5 will give a louder raspier sound

[@MCasti222]

Can I put this on a 2016 mustang gt?

[@SaSouthSide210]

No , get headers

[@akrs6398]

Sounds like a Tesla doing 100mph lol

[@TheAlexBradley]

Stock exhaust is VERY quiet

[@inker337]

hey I need an estimated bill from the downpipe to the exhaust outlet ecoboost 2016 I recommend have a budget you promote what you offer good quality thank u for ur video I already subscribe I want to open an account with you

[@CarlosChavez-fj7cm]

All the mustang eco boost drivers trying to get more power😅🤣

[@slimeslatt5207]

just like anybody who owns a car...

[@yokonovich]

To unleash the power

[@Bassh3ctor]

What's the problem?

[@SaSouthSide210]

It frees it up , now go ride your bicycle 🤣

[@E52O4]

All Mustang (and other pony/muscle car owners) want to get the most out of their car. That’s why we don’t drive boring sedans.