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MBRP XP Series Cat-Back Exhaust w/ Y-Pipe; Street Version (15-20 EcoBoost Fastback w/o Active Exhaust)

Item 389211
Market Price $758.99 You Save 12% ($89.00)
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      Review & Installation Video

      What's up guys? Stephanie with, 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

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • 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
      • Not Compatible with Active Exhaust
      • Fits 2015-2020 EcoBoost Fastback Mustangs


      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 2015-2020 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 2015-2020 EcoBoost Fastback Mustangs without the Active Valve Exhaust.

      Fitment: 2015 2016 2017 2018 2019 2020 Details

      MPN# S7274409

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (35)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 35 customers

      Installation Time: Afternoon

      Installation Cost: $100-$250

      • January 20, 2020

        5 2015 EcoBoost - MarshallG Installation Time: Afternoon

        Perfect Tone

        Knowing a 4 cylinder will never have that Coyote sound, I was concerned about what this system would sound like on my 2015 Ecoboost. I have heard the raspy systems that in my mind, are not what a Mustang should sound like. Additionally, my Mustang is a daily driver. I really enjoy time on the highway with my car. I was really concerned about droning sounds at highway speed. The MBRP XP Street system is exactly what I was looking for. Great quality and fit. Absolutely zero drone, and a respectable low rumble that is not obnoxiously loud. I believe it’s the system Ford should have put on the performance pack car to begin with. On the highway at cruising speeds, you know it’s there, but it’s a tone that won’t stay in your head for hours after the drive. My only complaint is; in the American Muscle photos, the muffler is polished. The unit I received was not. At first, I thought they sent my the wrong system. I’m okay with the raw stainless look. This was not a deal breaker. In summary, this is a great system at a great price. Awesome for the Ecoboost! I recommend if you want to stay away from raspy, over the top loud exhaust sound.

        Helpful (0)
      • June 14, 2019

        4 2019 EcoBoost - Moomyoung Installation Time: Less than 1 Hour

        For the money...

        I purchased the MBRP street catback and for the most part I am happy with it. For the price it’s not breaking your wallet like the other exhaust companies. The fitment was 4 out of 5. The sound is a little louder than stock but much deeper n cleaner. I chose this set up since I’ll go with a down pipe later and I don’t want my exhaust screaming loud. Thanks again American Muscle!

        Helpful (0)
      • May 30, 2019

        5 2018 EcoBoost - AdamK Installation Time: Less than 1 Hour

        MBRP XP Series Cat-Back Exhaust on 2018 Ecoboost

        Second exhaust MBRP XP Series Cat-Back Exhaust I have owned. Had one previously on 2015. On the 2018 it sounds a little different because the 10 speed gearbox keeps the revs down in most driving and that keeps it in the peak deep sound range more..... which sounds great...

        Helpful (1)
      • May 16, 2019

        5 2015 EcoBoost - BrianK Installation Time: Less than 1 Hour

        Great Exhaust...

        This exhaust came in on time. It was SUPER easy to install, I only had 2 ramps -backed the rear wheels up on them and went to town... it took less than 30 minutes to install. The materials are great, the hardware is great... The sound is great... not too loud and not too silent... you can hear it when you get on the pedal for sure, but idling at temp its practically silent. Has a little growl at idle though... I recommend this exhaust for an Ecoboost Mustang.

        Helpful (1)
      • May 09, 2019

        5 2018 EcoBoost - Guineabear Installation Time: Shop Install Installation Cost: $100-$250


        Love it...Perfect sound. Not too loud and not too quiet. Arrived promptly and everything was as advertised. The 3 inch pipes are perfect and the ends look great. Had it installed by our Ford dealer.

        Helpful (0)
      • April 24, 2019

        4 2017 EcoBoost - Hunterh Installation Time: Shop Install Installation Cost: $100-$250

        MBRP XP Street

        Took my mechanic a few hours, you can tell there is a difference in sound. I wish it was a little bit louder though. This was my first mod. Plan on doing a CAI and tuner next. Overall, pretty pleased.

        Helpful (0)
      • April 21, 2019

        5 2018 EcoBoost - Samscha4 Installation Time: Less than 1 Hour

        MBRP Street

        Overall, an excellent exhaust. Was looking for something with a deep tone that wouldn’t drone with normal driving. With the windows up, the exhaust is hardly noticeable with normal driving. There is slight drone at highway speeds (60-80 mph), but it is only equivalent to having the stereo volume at about 4. Once you get up to around 3K RPM, the exhaust suddenly comes to life. Fitment was perfect.

        Helpful (0)
      • February 27, 2019

        5 2018 EcoBoost - PaulM Installation Time: Less than 1 Hour

        Great Sound

        Exhaust is great! The sound is deep, and at idle it’s subtle but noticeable. When you open it up it has a really unique sound for a 4 cyl with a little Crackle Pop. I work at a German import dealer and all the techs really like it. Fit wise it’s not the greatest because it’s big. It gets nervously close to the subframe, and had to manipulate the hangers to get it to hang evenly. Overall very satisfied.

        Helpful (1)
      • February 22, 2019

        5 2018 EcoBoost - Joe Installation Time: Less than 1 Hour

        Just Enough

        Just Enough Sound .. not overwhelming on the road.

        Helpful (2)
      • December 11, 2018

        5 2015 EcoBoost - jehn Installation Time: Afternoon

        Great Exhaust

        I've been wanting to put a new exhaust on my '15 ecoboost but didn't want to spend over $1000 to do it. I read the reviews about the mbrp exhaust and loved the price. It took my husband less than 2 hours to install, he said it was much easier than the pypes exhausthe put on my '06 Mustang. Just looking at the 2 exhausts sisde by side, you can see how much better the mbrp one is. Goodbye to the resinator and the huge mufflers. I love the new sound and can't wait to drive it again in the spring when I take my Mustang out of storage.

        Helpful (3)

      Questions & Answers (12 answers)

      5 Top Rated Questions

      Trying to decide between a few exhaust options, including MBRP Street vs Race. Is this system more raspy than the Race version? I understand that it is quieter, but through the videos it does sound different - not just quieter - than the MBRP Race

      • The MBRP XP series will have less rasp then the race series does and will have more of a deeper sound to them.

      Helpful (4)

      Will this fit a 2017 convertible?

      • Unfortunately this cat-back exhaust will not fit a convertible model due to the different bracing.

      Helpful (2)

      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, ( is made of an aluminized steel construction. The MBRP Street Cat-Back Exhaust w/ Y-Pipe - Black Tips - Fastback (15-17 EcoBoost), item # 389213, ( 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.

      Helpful (1)

      Does this exhaust pop/crackle as much as the race? The video of the race version doesn’t do that and is also much quieter.

      • This exhaust really shouldn't pop and crackle too much, as it is more of a classic muscle car sound versus being loud just to be the loudest exhaust on the block like some of the race versions. I hope this helps!

      Helpful (0)

      Is this cat-back legal in NY?

      • You would need to reach out directly to your local state emissions in order to verify.

      Helpful (0)
      Post Your Question
      7 More Questions
      Will this fit a convertible? 1 answer
      Will I have to get the ECU recalibrated after installing this? 1 answer
      Anyway I could get this in dual tips instead of single? I have a Roush. 1 answer
      Okay my question is how can this connect to an aftermarket 3" downpipe? 1 answer
      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 1 answer
      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. 1 answer
      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. 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Extension Y-Pipe
      • (2) Muffler Assemblies
      • (2) Tips
      • Clamps

      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-throughFitment:2015-2017 EcoBoost Fastback

      Will It Fit My Mustang

      • EcoBoost - 15, 16, 17, 18, 19, 20

      Not compatible with Convertibles due to different bracing

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