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MBRP XP Series Cat-Back Exhaust w/ Y-Pipe - Street Version (15-17 EcoBoost Fastback)

Market Price $804.99 You Save 13% ($105.00)
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  • Item 389211
  • MPN# S7274409

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Features, Video & Details

  • Classic Muscle Car Sound
  • Improves Exhaust Flow for More Power
  • Street Mufflers and Y-Pipe Included
  • 409 Stainless Steel Construction
  • 3" Mandrel-Bent Tubing
  • 4.5" Polished Slant Cut Tips
  • Direct Bolt-On Installation
  • Fits 2015-2017 EcoBoost Fastback Mustangs

Review & Installation Video

Review & Install Video

What's up guys? Stephanie with AmericanMuscle.com, and this is my review of the MBRP Street Catback Exhaust, fitting 2015 and up Fastback Ecoboost Mustangs. The MBRP Street Catback is going to be a great option for the S550 Ecoboost owners out there that are looking for a deep sounding system that isn't over the top or too loud. This system gives the closest thing to what I'd call a muscle car sound from an Ecoboost. It's a deep sounding catback that doesn't have any raspiness to it, and it sounds different than a lot of the other catbacks for the Ecoboost that are out there right now. Like most setups, this catback's going to eliminate the factory resonator and replace it with just a Y-pipe. MBRP has included their street mufflers and this setup's going to give a sound that's like the MBRP Race Catback but with less volume, as you guys already heard from the sound clips. So MBRP has a few options for the Ecoboost Mustang and they're all hitting that lower price range, which is nice to see. MBRP gives you some options as far as material, which we'll talk about in a minute here, but you also have the option of the Street Catback, which is this one right here, or the Race Catback, and the difference is going to be in the sound. The Street and Race Catback are similar in sound, but the Street Catback is quieter than the Race Catback is. But I wouldn't really say that the Race Catback is quiet in the grand scheme of things; it has some volume to it, for sure. Like I said before - and this is in line with what we're typically seeing with after-market catbacks from the Ecoboost - this catback's going to eliminate the factory resonator and replace it with a standard Y-pipe. Removing this resonator's going to have a bunch of performance benefits. You're looking at sound and power improvements and, as Ford Racing has reminded us, even some weight benefits. Dropping that resonator and replacing it with a Y-pipe is going to drop some easy weight, and that's just a nice little bonus you get from swapping over to this system. This is a three-inch system that can work with both the stock or an after-market down pipe, so you're seeing a bump up in size here with the MBRP system, and this is one of the only catbacks that's a three-inch. Most of what's out there right now is either going to be stock size, so two and a quarter, or two and a half-inch. So it's nice to see a three-inch system here, especially for a turbo car. This system that we have here is the full, stainless steel catback. MBRP also offers a Street Catback with aluminized piping instead, and within that they give you two options: either powder-coated from the muffler assembly portion back, or polished. Just keep in mind that material will have a factor on the price, which I'll break down some more in a minute. So with this type of basic Y-pipe to a muffler setup, all of the sound and what's going to make this catback different from the rest is going to be in the mufflers. Like I said earlier, MBRP has their street mufflers on this system. So the Y-pipe's going to open up exhaust flow for the street mufflers, which are a lot like the Race series mufflers but just more refined. And I'm sure you picked up on this when you heard the sound clips earlier. And so far, from what I've heard, my overall impression of this catback is that it does one of the best jobs of creating an aggressive sound, and this is a definite improvement over stock. I know that you can hear that this catback is deeper than the factory exhaust and, even as the RPMs start climbing, this is able to keep the deepness in the tone and that's a feature that I haven't seen from many other catbacks. I keep mentioning this, but the Street Catback is going to sound along the same lines of the Race Catback but just quieter. So if you really like the Race Catback from MBRP but it's just a little too loud for you, then this is an excellent choice for you. This catback gives a smooth sound, and I didn't hear any sound distortion at all. There is a little popping on decel from the higher RPMs, but I think it just adds to the sound. It doesn't take away from it because it isn't over the top. And even though this catback does have some volume to it, there's no interior drone. You almost don't even notice that there's an after-market exhaust on the car at cruising speeds, so that means you won't have any trouble having a conversation or listening to the radio on the highway, and so you won't have to worry about dealing with droning on trips. So like most after-market catbacks, this one's going to open up some of that nice turbo noise. But I did notice that the deepness of this system drowns out a lot of that noise. I'm not saying this is a bad thing, but it's going to be a little hard to consistently hear the turbo spool throughout the entire RPM range, if that's important to you, but you do hear some of it and you still hear the blow-off. With all of that being said, you have to keep in mind that this is a four-cylinder turbo car. It's not going to sound like a V8. But this catback does have that clean, deep type of sound that's relatable to the sound of a V8, so if that's what you're looking for then you're looking in the right place. Overall, if you're looking for a louder, deep sounding system then this could be a good option for you. This is a powerful sound that does have a deep growl to it. While it's not the loudest of the after-market options, it's still pretty loud and so I'm going to give it a three out of five on the loudness scale. With catbacks, it really all depends on what you're looking for, and luckily there are quite a few options out there. But like I mentioned earlier, MBRP gives you three different options when it comes to the Street Catback. This one is the stainless steel version, which is going to be a complete 409 stainless steel construction, and it's going to be the most expensive of the the three options, costing $700. Then there are two aluminized steel versions of this catback, either in polished or powder-coated black, and while both of these options are less expensive than the stainless steel option, the black powder-coated one is more pricy and only costs a few dollars less than the stainless steel. The regular aluminized steel catback, on the other hand, is going to cost just over $600. But there are benefits of going with a powder-coated or, better yet, the stainless steel version, especially if your car's a daily driver. These are going to give you some corrosion resistance. And even if you go for the most expensive option, these are still the least expensive catback options for the Ecoboost that are available right now. When it comes to the install, you're going to be looking at an easy one out of three wrenches on the scale when we look at difficulty. This is considered a direct bolt-on item, so you won't need to cut anything or modify anything to get it installed. All that you're really going to need is a socket set, and a lift would certainly make things easier but the job can be done on stands as well. You're going to be removing your exhaust from the resonator back, and an extra set of hands can make things easier for you here. You'll be moving over your hangers to the new catback, so I'd recommend taking them off of the factory exhaust when you drop that. It'll only make the swap a little easier. The only other thing you'll reuse is the front clamp off of the resonator for the front of the new catback. The whole catback can be dropped as one big piece, which is why an extra set of hands can really help here. And when you go to install your new setup, it'll probably be easiest to start from the front and move back. So install the Y mid-pipe area first, then the intermediate pipes and the muffler assemblies, and I'd leave everything loose until you have it all lined up and then tighten it down. The catback does come with four new clamps, so you won't have to worry about picking those up, and you can figure on spending about an hour or two, from start to finish, to get all of this done. Overall, the MBRP Catback is a great option for those looking for a deep sound but not wanting a system that's going to be too loud. This catback's going to replace the factory resonator with a Y-pipe that'll ultimately drop some weight and open up both exhaust flow and power. This is also a three-inch catback that comes complete, and is a direct bolt-on install that requires no cutting. You can check this catback out online some more for yourself, and for all things Mustang, keep it right here at AmericanMuscle.com.

Classic Muscle Car Exhaust Note. Now you can give your EcoBoost Mustang the aggressive exhaust note of classic muscle cars with an MBRP Street Cat-Back Exhaust System with Y-Pipe. This Street Cat-Back has been specifically tuned to get the optimal sound from your 2015-2017 EcoBoost Fastback. This catback not only sounds great, but also improves exhaust flow with the help of the included Y-pipe for an increase in RWHP and TQ.

Durable Stainless Steel Construction. Constructed from 3" diameter 409 stainless steel tubing for strength and corrosion resistance, this MBRP Cat-Back Exhaust System features two street mufflers that are completed with 4.5" polished 409 stainless steel slant cut exhaust tips. As an added bonus, the tips are etched with the MBRP logo for true custom styling.

Direct Bolt-On Installation. Engineered to be a direct upgrade replacement for your Mustang's factory exhaust, the MBRP Street Cat-Back Exhaust Kit with Y-Pipe easily bolts up in the stock location with no modifications required.

Application. This MBRP Stainless Steel Street Cat-Back Exhaust is specifically designed to fit all 2015-2017 EcoBoost Fastback Mustangs equipped with the 2.3L EcoBoost engine.

Fitment: 2015 2016 2017 Details

What's in the Box
  • (1) Extension Y-Pipe
  • (2) Muffler Assemblies
  • (2) Tips
  • Clamps
Installation Info
Tech Specs
Cat-Back Exhaust Specifications
Piping Material: 409 Stainless Steel Tip Material : Polished 304 Stainless Steel
Piping Size: 3" Tip Size: 4.5"
Muffler Type: Straight-through Fitment: 2015-2017 EcoBoost Fastback
Will it fit my Mustang?
  • EcoBoost - 15, 16, 17

Not compatible with Convertibles due to different bracing

People Who Bought This Item Also Bought

Most Helpful Reviews

Much Needed Upgrade - Perfect Note

Was looking for something with the deep tone without having to much crackle and pop, this system delivers it. I think this cat-back adds the perfect note needed for the ecoboost. Install was done in home ...

Read More
Helpful (1)

Great Bang For The Buck

Wanted a nice sound without a lot of drone since this is my daily driver and I will be adding a new downpipe and this MBRP exhaust was right on the money. Mellow sounds at idle, real nice, deep sound when ...

Read More
Helpful (1)

Overall Rating 5 out of 5 stars
Read All 6 Reviews

Customer Photos

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5 Questions / 4 Answers

Ask a Question

Okay my question is how can this connect to an aftermarket 3" downpipe?


  • The downpipe will connect directly to the downpipe without the use of the step-down pipe that comes with the downpipe.


Helpful (0)

Just had this installed a couple of weeks ago and I noticed a drop in my mpg without changing driving habits. This catback should be pass the o2 sensor and not affect the ecu right? Or ami I missing something else? Thanks


What's the difference between stainless steel, black, and aluminized? What are the warranty on each of those?


  • The MBRP Street Cat-Back Exhaust w/ Y-Pipe - Stainless Steel is simply made of a 409 stainless steel construction. The MBRP Street Cat-Back Exhaust w/ Y-Pipe - Aluminized - Fastback (15-17 EcoBoost), item # 389212, (http://www.americanmuscle.com/mbrp-street-catback-aluminized-eco.html) is made of an aluminized steel construction. The MBRP Street Cat-Back Exhaust w/ Y-Pipe - Black Tips - Fastback (15-17 EcoBoost), item # 389213, (http://www.americanmuscle.com/mbrp-street-catback-blacktip-eco.html) is made of an aluminized steel construction that is powder coated black. If you have any issues with the exhaust after it has been installed, you can get in contact with one of our Representatives by following the link below. http://www.americanmuscle.com/contact.html


Helpful (0)

You have probably been asked this before but can you get black tips on this stainless system as an option? My 2015 Ecoboost is a black 50 year package and I want black tips.


  • We do not offer the MBRP street cat-back with the black tips in the stainless street option. We do have the black tips on a street cat-back which can be found here in the aluminized steel construction item #389213.


Helpful (0)

Hello.. I got my Mustang Ecoboost recently and I use it for daily commutes. I would like to know if this cat back exhaust is street legal or not. In Ford Performance exhausts, they display a warning for sport exhaust "Installation of this part on a vehicle that is driven on public roads may violate U.S. and Canadian laws". But they do not display that warning for touring exhaust. So I was wondering if installation of this exhaust violates any laws.


  • The MBRP Street Cat-Back Exhaust w/ Y-Pipe - Stainless Steel should be legal in all 50 states. However I will recommend checking with your local inspection station to make sure.


Helpful (0)

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Customer Reviews (6) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Loudness / Volume 3.833333 3.8
  • Exhaust Note 5 5
  • Fit & Finish 4.333333 4.3
  • Bang For Your Buck 5 5

  • 5/5

    Installation Time: Afternoon

    March 26, 2017

    Much Needed Upgrade - Perfect Note

    Was looking for something with the deep tone without having to much crackle and pop, this system delivers it. I think this cat-back adds the perfect note needed for the ecoboost. Install was done in home garage on ramps and stands. Alignment was a bit tough but using a floor jack with some jack stands did help making alignment adjustments before tighten up the joints.


    Year: 2015 Submodel: EcoBoost

    Helpful (1)

  • 5/5

    Installation Time: Full Day

    June 24, 2016

    Great Bang For The Buck

    Wanted a nice sound without a lot of drone since this is my daily driver and I will be adding a new downpipe and this MBRP exhaust was right on the money. Mellow sounds at idle, real nice, deep sound when revving and very minimal drone at cruising speed. And the price is right on as well. You can't go wrong with this exhaust.


    Year: 2016 Submodel: Ecoboost

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    April 19, 2016

    Mbrp street

    A must have exhaust systems for your 2016 Mustang ecoboot dont sound like a Bumblebee


    Year: 2016 Submodel: Ecoboost

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    August 02, 2017

    Nice upgrade from stock exhaust!

    I installed this on my 2016 ecoboost convertible and it is exactly what I was looking for. It is not too loud but does provide a deep tone that makes my car sound much more agressive. Even though is says it is for the fastback it will work on the convertible with some customization to the under car brace to avoid any rattles.


    Year: 2016 Submodel: EcoBoost

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    July 01, 2017

    Great exhaust for a smaller budget

    Great exhaust for the price, took less than an hour to install using a lift. Nice deeper tone.


    Year: 2016 Submodel: EcoBoost

    Helpful (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    January 24, 2017

    Nice tone

    The exhaust has a very good sound. It definitely does not sound like a V8 but it improved the sound of the car a lot. It got rid of the old nasty tips. The new tips are 4" stainless steel and they look great. The car gained a decent amount of power.


    Year: 2015 Submodel: EcoBoost

    Helpful (0)

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