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Ford Performance Boss Style X-Pipe and Side Exhaust (15-19 GT Fastback)

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  • Item 384704

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    Features, Video & Details

    • Boss Style True Quad Exhaust
    • Distinctive "Trans-Am" Racing Sound
    • 409 Stainless Steel X-Pipe
    • Left and Right Side Pipes
    • 304 Stainless Steel Tips
    • Fits 2015-2019 Mustang GT Fastbacks

    Review & Installation Video

    Review & Install Video

    Hey, guys, Justin with AmericanMuscle.com here with my detailed review of the Ford Racing Boss Style X-pipe with side-exit Exhaust available for your 2015 and up Fastback GT. So obviously, Ford hasn't released a 2015/16 Boss 302 as of yet, but what they have done is released one of the coolest parts from the S197 Boss and now made it available for all you S550 owners out there. And that is the Ford Racing mid-pipe equipped with the very awesome side-exit exhaust. Now, before we get any further, guys, this is definitely more of a sound modification as opposed to an appearance mod. Some of you might hear side-exit exhaust and think maybe 427 Cobra or SN95 Roush, definitely not the case here with this part. These side pipes get tucked way underneath under the rocker there, pretty unassuming when installed. Now, the big difference, though, between the two systems, the S550 and the S197, is they went with an X-pipe here. Ford Racing decided to go X with the S550 as opposed to the H-pipe found on the S197 Boss, and traditionally, that tells us this thing is gonna have a little bit more rasp to it and it does. It's not out of hand. I heard it, of course, in person. It's a lot louder than I thought this thing was gonna be. Honestly, I feel like it's louder than the S197 Boss System, and it offers some good bark. And as a matter of fact, guys, I actually think this thing installed with the factory can still in place, it's almost the perfect sound. I mean, you'll get a lot of bark, a lot of presence, cruising down the street. You get up next to a Jersey barrier on the highway, this thing is screaming in your ear. It is just an awesome system. Now, for that reason alone, it's an easy three out of five. I'm even willing to give that a slight nudge up to a four out of five on our one to five "we're gonna wake the neighbor" scale, which is pretty much uncalled for for a mid-pipe only, but this thing definitely delivers. Now, we also installed the Ford Racing by Borla Sport Axle-back in conjunction with this mid-pipe, and obviously, as you would expect, that knocked it up a few notches, and at that point, all bets are off, everybody knows you're coming. Standard X-pipe here from Ford Racing for your S550 sells on AmericanMuscle.com for around $200 without the side-exit exhaust. Add in these pipes here on the side, and that's gonna add in another $800 onto the final price, but with that said, this is a quality system as you would expect from Ford Racing. 409 grade stainless steel throughout, mandrel bends, good welds, the tips here are 304 grade stainless steel, and of course, this thing does include all the hardware and everything else needed to get it installed. Let's talk about installation, because you're probably wondering how this thing gets bolted up underneath your ride. Well, as for the mid-pipe guys pretty standard stuff there, right? Cut and clamp resonator to leak, so obviously you're gonna have to cut out that factory resonator, not a big deal whatsoever. Get yourself a fresh Sawzall blade, Sawzall, some eye protection, and that's gonna be a standard two out of three wrench job on my overall difficulty meter. As for these side pipes here, guys, whether you know it or not, there's actually a few threaded holes underneath the chassis on your S550, and that's where these little holes here are going to mount to. So again, Ford Racing does include all the hardware gaskets needed for this installation. Again, a solid two out of three wrenches on my difficulty meter. It's not exactly hard, but because you have to cut, I'll knock it up to two. And maybe about an hour or two from start to finish before you're all said and done. All right, guys, in my opinion, the Ford Racing Boss Style Mid-pipe for your S550 is just an awesome product from conception down to delivery. It's gonna give you a tone that's unmatched by any other aftermarket exhaust system out there for your ride, although it does come at a price. So be sure to check out a Ford Racing Boss Style Mid-pipe for your S550 GT right here at AmericanMuscle.com.

    Sound Like a Boss. Give your S550 GT Fastback that distinctive "Trans-Am" racing sound with a Ford Racing Boss Style Side Exhaust Kit. This Boss Exhaust Kit retains the use of the rear exit factory exhaust while adding Trans-Am style side exhaust pipes for a "true" quad exhaust system.

    Reuses Stock Cats. The installation of the Ford Racing Boss Style Quad Exhaust System requires cutting and removing the factory resonator and replacing it with the supplied 409 Stainless Steel X-pipe. Best of all, it reuses the factory catalytic converters, saving you money, and comes complete with polished 304 Stainless Steel Tips.

    Legendary Ford Racing Quality. When you're adding new parts to your Pony, you can't go wrong by installing parts from the folks that know it best. Ford Racing's legendary quality ensures a perfect fit and years of hassle-free use.

    Application. This Ford Racing Boss Style X-pipe and Side Exhaust is a specifically designed for use on the 2015-2019 GT Mustang Fastbacks equipped with the Coyote 5.0L DOHC V8 engine. Does not fit convertible models.

    Fitment: 2015 2016 2017 2018 2019 Details

    MPN# M-5220-M8

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

    What's in the Box
    • (1) X-Pipe
    • (1) Driver Side Exhaust Pipe
    • (1) Passenger Side Exhaust Pipe
    • (1) Hardware Pack
    Installation Info
    Tech Specs
    Mid Pipe Specifications
    Style Mid Pipe: "X" Type Headers Required: Shorty or Stock Manifolds
    Piping Material: Stainless Steel Piping Size: 2.75"
    Catalytic Converter: Reuses stock Catalytic Converters Fitment: 2015-2017 GT Mustangs - Coupe
    Will it fit my Mustang?

      Customer Photos (8) Submit Your Photo

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        Questions & Answers (25)

        5 Top Rated Questions

        Will this be compatible with the Kooks Muffler Delete Axle-Back Exhaust without active exhaust?

        • We, unfortunately, cannot guarantee fitment when mixing aftermarket exhaust items and accessories.

        Helpful (1)

        What’s the weight difference between this and the standard Ford Performance X-pipe?

        • The Ford Performance Boss Style X-Pipe and Side Exhaust will weigh in at 25lbs compared to the Standard Ford Performance Cut and Clamp Resonator Delete X-Pipe weighing in at 12lbs.

        Helpful (1)

        Will this work with Eibach Sportline Lowering Springs? Will there be any clearance issues?

        • This system will work with the Eibach sportline springs yes. Now you will have less ground clearance so you will want to be careful when going over bumps.

        Helpful (1)

        Will this fit with the BMR Chassis Jacking Rails installed?

        • The Ford Performance Boss Style X-Pipe and Side Exhaust will not fit properly with the BMR Chassis Jacking Rails installed.

        Helpful (1)

        Will this fit with Kooks long tube off road headers with 1-7/8 in piping and roush axle-back mufflers?

        • The Ford Performance Boss Style X-Pipe and Side Exhaust - Fastback (15-17 GT) will work with the Kooks Long Tube Off-Road Headers - 1-7/8 in (15-17 GT) item #386635 (www.americanmuscle.com/kooks-or-lt-headers-2015gt.html) and Roush Axle-Back Exhaust (15-17 GT) item #387039 (www.americanmuscle.com/roush-axleback-2015gt.html) as the piping on all three will be the same size.

        Helpful (1)
        Post Your Question
        10 More Questions
        Will this system fit with the Roush Axle-Back Exhaust? Or does it have to be Ford performance axle back exhaust? Thanks. 1 answer
        Other than diameter size, is there anything else that would prevent this from going on a 2015 Mustang v6? 1 answer
        Could this fit a 2018 GT with some minor mods? I'd like to use this with the stock 2018 catback active exhaust coupled with long-tube headers and new cats/midpipe up front. What is different on the 2018 vs. a 2017 that this would not fit on a 2018 and what other mod would be needed to overcome it? 1 answer
        Will this fit a AWE track edition cat-back exhaust? 1 answer
        Will this fit an 18 gt? 1 answer
        is this CA. Legal? 1 answer
        Will this x-pipe fit with bbl long tube headers? 1 answer
        I currently have the Roush cut and clamp x-pipe installed on my 2017 GT. Will this work by replacing that x-pipe or will the pipe already have been cut too far? 1 answer
        What exactly restrict me on putting this system on a convertible s550? 1 answer
        Does this system have restrictor plates, like the OE on the '12-'13 Boss, which could be removed with two screws. It looked there were no plates on this system in the video. I have a Roush axle back currently, will this fit with this? How loud do you expect? I am considering a flowmaster outlaw axle back in its place, will that be much louder than the Roush? 1 answer

          Customer Reviews (43) Write a Review

          Overall Rating 4.7

          out of 5 stars

          Installation Time:Full Day

          Installation Cost:$100-$250

          • Loudness / Volume 4.666667 4.7
          • Exhaust Note 4.833333 4.8
          • Fit & Finish 4.547619 4.5
          • Bang For Your Buck 4.166667 4.2



          • 5/5

            Installation Time: Afternoon

            February 05, 2019

            15 boss style x-pipe (AMAZING)

            I wasn't sure if this system would deliver the sound I was expecting, boy am I impressed. this sucker is loud AF, paired up with a LUND Racing cam tune, My god! I love driving my car more so now than ever before.

            JoseG

            Year: 2015 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Afternoon

            January 02, 2019

            Makes sure no one thinks your Bullitt isn't a V8

            This is the second S550 that I have installed this system on. My first was a 2015 Roush that was supercharged. I felt the system was a bit too loud on that car with the Roush axle backs, but on my 2019 Bullitt, the sound is just right. I believe the factory active exhaust helps quiet it down a bit. However, you will lose the ability to really do "quiet" mode with this system (closing the valves really just seems to push more sound out the side pipes), which I was fine with, but you may want to consider if you want to not always be on the loud side or plan to install the included baffles in the side pipes (I did not). The burbles and crackles with this system are awesome and the side exhaust is in an idle spot to hear it all given its location to your ears. This isn't a cheap system for sure, but worth it in my opinion. I get an even bigger grin when I drive my Bullitt now. One installation note to mention, the included Ford Performance directions say to cut 4 inches in back of the factory resonator, but it actually required cutting closer to 5.5 inches. I had to do a second cut as a result.

            Jason29

            Year: 2019 Submodel: Bullitt

            Helpful (3)

          • 3/5

            Installation Time: Afternoon

            December 28, 2018

            Best sound if you're willing to put in the work.

            First off, the sound is amazing! Absolutely what I was going for when I wanted to old school Trans-Am racer tone. It gives a great cold start bark, then settles out to a mild burble until you give it gas. I love the sound and tone that it brought to my car. What I didn't love was the install. The directions provided by Ford are completely inadequate and will actually steer you wrong if you follow them to the letter. The adage of measure twice, cut once is crucial to the install of this x-pipe and do not trust the measurements in the instructions. Keep in mind when fitting onto the car the location of the x-pipe is determined by the bolt locations for the side pipes. Bolt the assembly together to figure out your cuts and fitment from there. My install was done on jackstands in the garage. If you have access to a lift it would be easier to mock up the assembly and minimize the number of cuts to the factory exhaust. If you do it on jackstands, I would expect to make at least an additional two final fitment cuts before you're able to bolt the tail pipes to the x-pipe. Would give the exhaust 5-stars if the instructions and installation had been given a little more thought from Ford.

            Kris

            Year: 2015 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Afternoon

            November 23, 2018

            From Boring to Bad@ss Sound!!

            Expensive, yes, but definitely worth it if you want to wake up the neighbors with a meaty exhaust note, even with the stock catbacks.

            Timothy

            Year: 2015 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: 0-$100

            November 03, 2018

            nice sound

            install took a little more than expected because I had 3 inch tailpipes so had to get it installed at a shop to custom to make the connection to these 2 1/2 inch pipes. other than that it is awesome and loud.

            RandyF

            Year: 2017 Submodel: GT

            Helpful (6)

          • 3/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            October 09, 2018

            Great sound poor fitment

            A few things, the instruction sheet included is for a generic midpipe part, the side pipes bolt alignment was way off resulting in a much shallower connection into the header sleeve, and cutting 4 inches from the resonator ended up being closer to six. Ended up having to take it to a shop to finish the install, they were nice enough to weld it for me though. The sound is great! The cold starts are a little rough and a bit on the lower side, but aren't a great indicator of what to expect once it's moving. It roars, purs, barks and without drone. I kept the stock mufflers.

            Verkruk

            Year: 2015 Submodel: GT

            Helpful (7)

          • 5/5

            October 02, 2018

            THIS IS THE ONE...

            If you've been looking for "THE ONE" this is it. Sounds like a true beast when you punch it and just the right amount of rumble at idle. So glad I spent the extra couple hundred bucks to get exactly what I was hoping for.

            CraigS

            Year: 2017 Submodel: GT

            Helpful (6)

          • 4/5

            Installation Time: Afternoon

            September 18, 2018

            Fits ‘18, great sound

            Installed on my wife’s 2018 GT with active exhaust, fits perfectly. Does add some rasp at high rpm, will probably install some small resonators. The side pipes add a lot of great sounds into the cabin.

            Dezertnut

            Year: 2018 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Less than 1 Hour

            June 04, 2018

            Beautiful sound

            Very easy to install, took under an hour. The sound is incredible, pairs well with muffler deletes if you want it really loud. At 60 MPH you can hear the exhaust, not too loud that you cant talk to the person next to you.

            JustinM

            Year: 2017 Submodel: GT

            Helpful (9)

          • 5/5

            Installation Time: Afternoon

            May 27, 2018

            Great Sounding

            X pipe with side exhaust is awesome. It sounds mean and is louder to the driver. The welds on my x pipe were not the greatest. Installation was fairly easy.

            LightingBlue

            Year: 2017 Submodel: GT

            Helpful (9)

          • 5/5

            Installation Time: Afternoon

            April 03, 2018

            Boss styling

            This is how the mustang should've have outta the factory! Gives that aggressive sound! highly recommend this!

            JackM

            Year: 2017 Submodel: GT

            Helpful (9)

          • 4/5

            Installation Time: Shop Install

            March 30, 2018

            Louder than you expect--but GLORIOUS

            No online video does this justice. This is a LOT louder than a midpipe/resonator delete alone has any business being. Cold starts are absolutely thunderous. Slow idle and parking-lot speeds give you a low, menacing rumble. This exhaust is really something when you get going under load, though. Sounds like a Trans-Am race car. Blips on downshifts are equally thrilling. You will definitely notice this cruising on the freeway. The AM video understates how loud this is at about 2000 RPM in sixth gear--it's definitely louder than stock. It's not too obnoxious, and, if you're considering this, you probably won't mind, anyway. All that said: this sounds fantastic. This is what you imagined the Coyote motor would sound like. Every time I drive my Mustang, it puts a huge grin on my face. Despite the cost, it's worth it because of the unique sound.

            Luigi

            Year: 2017 Submodel: GT

            Helpful (9)

          • 5/5

            Installation Time: Less than 1 Hour

            March 27, 2018

            GLORIOUS !!!

            It took about an hour to get it installed, the first start up, sound like glory. When I drove her down the street, GLORIOUS !!!!

            DavidK

            Year: 2017 Submodel: GT

            Helpful (9)

          • 4/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            March 16, 2018

            as advertised

            First of all, I didn't like the way the item is packed without foam to cover the components. Also there was a little complication with the cutting since I have to cut 5inch on one side and 4inch on the other side, but somehow the tips line up perfectly at the end (weird). Anyway, the xpipe sounds AMAZING! The best part is they're pretty quiet when the engine is idling, but as soon as I put my foot on the gas...it's a different story! Good buy.

            DannyPhony

            Year: 2015 Submodel: GT

            Helpful (10)

          • 5/5

            Installation Time: Less than 1 Hour

            March 11, 2018

            Above and beyond expectations!

            There really is no way to describe this product! In all honesty if you’re looking for a loud x pipe, this is the one. I also have kooks headers and flow master outlaws and I highly recommended a tune from Alex at vmp! It’s a night and day difference between a stock mustang and a tuned mustang! With the addition of some simple suspension upgrades I can attest to the claims made by primium aftermarket part makers that the car plants all the power to the ground now and eliminates Wheel hop. In all if you're a true muscle car enthusiast, there’s no substitute for the sound and performance this part provides!

            Mike

            Year: 2015 Submodel: GT

            Helpful (11)

          • 5/5

            February 10, 2018

            Perfection at its best

            For anyone looking for the best sound...in my opinion, get it. The sound clip just doesnt do this system justice. We will never be able to get the old school sound we all know and love, but this is really close. This will give your stang the attitude adjustment for the guy who wants that good rumble. Hats off to Ford Performance.

            DarrenH

            Year: 2017 Submodel: GT

            Helpful (11)

          • 5/5

            January 03, 2018

            Perfect Sound

            Almost can't put it in words. Videos don't do it justice. Sound is amazing. Idles quiet and then the beast awakes.

            ChrisC

            Year: 2016 Submodel: GT

            Helpful (12)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: 0-$100

            December 23, 2017

            Quality piece that adds that extra roar you need

            I’ve owned this item for about 6 months now and have run it with and without catalytic converters. When catted it’s subtle but noticeable there’s something else there, but when it wasn’t catted it’s arguably one of the loudest system you can have. Only downside is my mustang is lowered on the eibach sport line springs and it’s enough to scrape on quite a few bumps and driveways.

            RandyA

            Year: 2016 Submodel: GT

            Helpful (14)

          • 5/5

            Installation Time: Afternoon

            November 28, 2017

            Great sound, not subtle above idle.

            I installed this system with a set of electric cutouts from QTP. With the QTP cutouts closed, it sounds good and is a modest improvement over the muted sound of the stock exhaust. With the QTP cutouts open, it's pretty loud when you're getting on it. Idle is also noticably louder, but not too loud. Initial cold startup with the cutouts open is pretty loud. I love it. This is exactly what I wanted: basically stock to rowdy at the flip of a switch. Mission accomplished.

            WW

            Year: 2016 Submodel: GT

            Helpful (11)

          • 5/5

            Installation Time: Less than 1 Hour

            November 16, 2017

            Superb

            Amazing. Best exhaust hands down, you can stand outside talking like normal while it isles and when you cruise no one thinks you have exhaust, then when you accelerate it sounds like you have a nascar. You won’t regret it, expensive but worth it, also i get better gas mileage so that’s cool!

            Cebow6

            Year: 2017 Submodel: GT

            Helpful (13)