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American Racing Headers 1-7/8 x 3 in. Long Tube Catted Headers w/ X-Pipe - Bottle-Neck Eliminator (15-20 GT)

Item 389162
Market Price $2,065.99 You Save 13% ($269.54)
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$1,796.45 (kit)

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    Features, Video & Details

    • American Racing Headers Bottle-Neck Eliminator System
    • Increases Rear Wheel Horsepower and Torque
    • Long Tube Header Design - 1-7/8"
    • High-Flow Catalytic Converters
    • X-Pipe Included - Eliminates Factory Resonator
    • 3" Mandrel-Bent Tubing
    • 304 Stainless Steel Construction
    • Intended for Off-Road, Track Use Only
    • Made in the USA
    • Fits Left Hand Drive Models Only
    • Fits 2015-2020 GT Mustangs with a 3" Aftermarket Cat-Back

    Review & Installation Video

    Review & Install Video

    Hey guys, Stephanie with, here with a review of these American Racing Headers long tube headers that come with an X-pipe available for 2015 and up S550 GT Mustangs. In this video we're going to be looking at a few different things in regards to this kit. We're going to talk about the materials and construction of the headers and the midpipe as well and the install, too. We'll talk more about those later, but I can tell you right now that long tube headers make for a difficult install, so I'm going to call this one a three out of three wrenches on the difficulty meter. This kit from American Racing Headers includes long tube headers and a matching midpipe, and it's going to be a good option for someone looking for a natural finish catted long tube header for both performance and sound gains that comes with a matching X-pipe midpipe and that makes way for a continuing three-inch exhaust.If we start with the heart of this kit, we'll be looking at the headers. Long tube headers are going to offer both performance and sound gains, but the end result of your headers will depend on the rest of your setup. The runners on these particular headers are one and seven-eighth inch, which is slightly different than the one and three-quarter inch offering. Traditionally you see forced induction cars running the larger runners and NA cars running the one and three-fourths runners, but I wouldn't really say that that's a hard and fast rule, especially with the new Coyotes. You don't have to have a blower to run a one and seven-eighths inch diameter. You just need to keep in mind your current mods and the goals that you have for your car when you're looking around as well as what this size runner will do to your power band with the mods that you have. If you have some bolt-ons but you're still NA, you might see a hit on your low end torque, but once you spin the Coyote motor up, the larger diameter's going to help keep things moving, so what you're going to see are top end gains.Getting into the specifics here, these are a 304 stainless steel headers that have a natural or a raw finish which is going to be different than a chrome or ceramic coated header. It obviously doesn't have the polished appearance that a chrome header would have. While these don't have the ceramic coating either, they are made from that 304 stainless steel tubing, so you won't have to worry about corrosion. Not to mention you get to see the beautiful welds since these have that raw finish.This is mandrel bent tubing, which is going to help with smoother air delivery. The primary tubes then merge down to a three-inch collector with scavenger spikes to help with exhaust flow. At the top here the headers then have these header flanges that are one piece, and they're one piece to prevent leaks and create a good fit. Then you have your connection pipes here. They are three-inch pipes and those are going to connect down to your midpipe. These are three-inch, like I mentioned earlier, and they are catted pipes. Then the connecting pipes will meet with the included X-pipe, and I like this for a few different reasons. First of all, American Racing Headers is the only company that's currently offering a full long tube and full midpipe kit right now. Second of all, this midpipe keeps a three-inch diameter all the way out, so you're going to need to get a three-inch system to bolt up to this. Then there's also the fact that this is going to eliminate your factory resonator. You have all these other long tube options out there that don't include midpipes and then you have step downs so you can run your factory exhaust, but then you're still keeping your factory resonator, which is a big power and sound robber. This kit gets rid of the factory resonator, so you're going to have huge sound and performance gains, and you are going to drop a little bit of weight too since that resonator isn't light.If we move on to price, as we all pretty much know or you'd know if you'd been shopping for long tubes, they're pretty much going to be a solid investment. They're pricy and they're difficult to install. The option from American Racing Headers, since this is a full midpipe and stainless steel header kit, is going to be on the more expensive side. Also, the one and seven-eighths inch runners that we have here are going to be slightly more expensive than a smaller runner would be, which isn't unusual. And this is the catted version as well, so that's also going to drive up the price. You're looking at spending between $1600 and $1700 for this kit. But do keep in mind that you'll be getting your X-pipe with this kit, so this setup's going to give you more performance and sound gains than you'd normally get from just long tubes alone. This price tag is exactly why I called long tube headers an investment earlier, but you do have to keep in mind all the benefits and power that you'll be getting from this setup. To put things in perspective, it's not just American Racing Headers that are going to be expensive. You're going to be looking at headers costing over a grand anyways.As for the install on this one, long tubes are always going to be a difficult install. I don't say this often, but if you don't have a helping hand or you don't have much experience, it might be better just to take the car to a shop for the install. If you do tackle this yourself, it's going to be a full three out of three wrenches on the scale and a day in the garage, especially considering that you'll be installing this midpipe along with the headers. You can do this on a jack and stands but a lift would make it easier for sure. You're going to need your toolbox for this one with an assortment of different sockets, wrenches and extensions. You're looking at things like disconnecting the steering shaft, dropping the starter and removing a motor mount. A lot of this install obviously requires working in some pretty tight areas. So while everything is straightforward, getting access and maneuverability in these areas is actually pretty tricky, which is why you need to pull the motor mount on one side so you can raise the motor slightly with a jack to give you some more room. Having a helping hand in this case is really going to benefit you, but a day of wrestling and some pretty pennies spent on these mods is totally worth it in my opinion.Wrapping things up with the American Racing Headers long tube catted headers that come with an X-pipe, these are 304 stainless steel headers that come with catted midpipe connection pipes and a matching X-pipe that are all 3-inch. These headers have one and seven-eighth inch runners, and this kit is going to come with everything that you'll need for the install. As usual, you can check it out more online for yourself right here at

    More Horsepower And Torque. Improve the power and performance of your S550 GT Mustang with an American Racing Headers Catted 1-7/8" Long Tube Header and X-Pipe Bottle-Neck Eliminator System. This American Racing Headers and X-Pipe combo will greatly improve your 5.0L coyote S550 Mustangs exhaust flow, compared to the restrictive factory manifolds and resonator Mid Pipe, to considerably increase rear wheel horsepower and torque.

    Race Car Growl. The included X-Pipe not only eliminates the factory resonator to help increase power, but it also adds a loud raspy, race car growl to the sound of your exhaust with its modern "X" crossover pipe design.

    Quality Construction. American Racing Headers are manufactured in the USA from mandrel-bent 1-7/8" diameter 304 stainless steel tubing that merges into 3" collectors with scavenger spikes for superior exhaust flow. These long tube headers feature a one piece 3/8" header flange for additional strength, leak-free performance and an OEM style fit.

    Required Upgrade. To realize the full power potential that these Long Tube Headers have to offer, AmericanMuscle highly recommends a custom tune with a Mustang Handheld Tuner to reprogram the vehicles computer (ECU) for proper operation.

    Cut & Clamp Installation. American Racing Headers designed their 3" Bottle-Neck Eliminator System to work in conjunction with most aftermarket 3" catbacks to eliminate the 3" to 2.5" step down restriction created by other 3 inch exhaust systems. Installation will require cutting and clamping the aftermarket 3" catback to fit into the included Mid Pipe. Clamps and detailed instructions are provided.

    Application. This American Racing Headers 1-7/8 x 3 in. Catted Long Tube Header with X-Pipe Bottle-Neck Eliminator System is designed to fit both Fastback and Convertible 2015-2020GT Mustangs equipped with the coyote 5.0L DOHC V8 engine. Requires the use a 3" aftermarket catback exhaust for proper installation.

    Technical Note. Long tube headers are not legal for use on pollution controlled motor vehicles; they are intended for off road use only.These Headers are intended for left hand drive applications only.

    Fitment: 2015 2016 2017 2018 2019 2020 Details

    MPN# MTC5-15178300BEXWC

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Driver side header
    • (1) Passenger side header
    • (2) Catted connection pipes
    • (1) X-pipe
    • (2) Header gaskets
    • (4) Oxygen sensor extension
    • (6) Clamps
    • (1) Bracket
    • (16) Bolts
    Installation Info
    Tech Specs
    Header Specifications
    Header Type:Long TubeType Mid Pipe Required:Included
    Material:304 Stainless SteelFinish:Natural
    Catalytic Converter:"Yes" - For off-road use onlyFitment:2015-2017 GT Mustangs
    Will it fit my Mustang?

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        Questions & Answers (6)

        5 Top Rated Questions

        Will this system work with the MBRP Street catback exhaust which already comes with a h pipe?

        • This will work with the MBRP Street catback, you will however need to replace the H-Pipe from the MBRP catback to ensure proper fitment.

        Helpful (1)

        Do these hook up directly to Corsa cat back Xtreme without any modifications?

        • As long as it's a 3 inch cat-back exhaust system, these headers will work.

        Helpful (0)

        What would I have to do to hook up a Corsa cat back?

        • As long as you have a 3" diameter tubing catback exhaust it will fit.

        Helpful (0)

        Will this work with Roush axle back and Roush x pipe? In other words could I just buy the headers without the American racing x pipe?

        • To purchase just the headers, this is the item you will need: American Racing Headers 1-7/8 in. Long Tube Catted Headers - Direct Connection (15-17 GT) (

        Helpful (0)

        I already have American Racing Headers 3 in. Pure Thunder Cat-Back Exhaust w/ H-Pipe on my GT now. Will this system work with what I have w/o any modification?

        • The American Racing Headers 1-7/8 x 3 in. Long Tube Catted Headers and X pipe will have no issues working with your American Racing Headers 3" exhaust.

        Helpful (0)
        Post Your Question
        1 More Question
        With stock exhaust, will these headers give more old school muscle car rumble or are they more raspy? 1 answer

          Customer Reviews (7) Write a Review

          Overall Rating 5

          out of 5 stars

          Installation Time:Weekend

          Installation Cost:$1000+

          • Loudness / Volume 4.333333 4.3
          • Exhaust Note 4.666667 4.7
          • Fit & Finish 5 5
          • Bang For Your Buck 4.833333 4.8

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $1000+

            March 27, 2019


            Got these headers installed along with my roush mufflers and it SCREAMS when you want it to, :)


            Year: 2016 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Full Day

            April 11, 2018

            Best headers ever!!

            Thank you American Muscle for making the process so easy. Didn't fit my 3" cat back Borla Attak. But making 2 pieces to fit took 9hrs to fully install! 5 star service thank you. I will put pic and video soon.


            Year: 2016 Submodel: GT

            Helpful (9)

          • 5/5

            Installation Time: Full Day

            October 12, 2017


            Fits perfectly, sounds great, a little raspy with the Ark J pipe exhaust system I have on it but overall def worth it! Much easier to install if you remove the K member, a lift is def necessary.


            Year: 2015 Submodel: GT

            Helpful (10)

          • 5/5

            Installation Time: Afternoon

            August 16, 2017

            ARH 1-7/8 Headers w/magnaflow street cat back.

            Finally had a chance to install my ARH long tube headers I had purchased before spring. Took a coworker and I 3 hours from start to finish using a lift and a complex assortment of wrenches and hand tools. (both certified ford techs) the install went very smooth. Only issue I ran into was tapping all of the threads that I decided to use a bolt instead of the factory stud. Passenger side, I was able to use all the factory studs and nuts. On the driver side, I replaced 4 studs with the supplied bolts. Be sure to tap the threads to clean and allow for straight bolt installation. One thing to keep an eye out for is the a/c line on the passenger side the bolt that holds it on the frame down near the starter does get a little too close for comfort and also where the hose connects to the hard line was rattling against the primary tube. A simple zip tied kept that from happening. The long tubes with the combination of the street series exhaust gave it a perfect street friendly growl with a very throaty sound. This car is race track only.


            Year: 2017 Submodel: GT

            Helpful (12)

          • 5/5

            Installation Time: Full Day

            May 06, 2017

            Amazing sound

            These headers sound amazing. The fit and finish are perfect. I paired them with MBRP street cat back and cut out the H-pipe and used the X-pipe that came with the the headers. The install took a little longer then expected but it is long tubes so no surprise there. Overall very happy with thes headers.


            Year: 2017 Submodel: GT

            Helpful (12)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $1000+

            December 07, 2016

            Power you can feel.

            This system adds sound but also power you can feel. I am running this with supercharger.


            Year: 2016 Submodel: GT

            Helpful (12)

          • 5/5

            July 05, 2016


            I just got this installed and all I can say is wow. I have these headers paired with the borla ATAK cat back exhaust. It's very loud but in my opinion a good loud. It has a noticeable deeper sound to it and I can feel the power deference. I would recommend these headers to anyone who is looking for a performance adder that is affordable and works!


            Year: 2015 Submodel: GT

            Helpful (12)

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