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American Racing Headers 1-7/8 x 3-Inch Long Tube Headers with X-Pipe -Catted; Bottle-Neck Eliminator (15-20 GT)

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

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      Video Review & Installation

      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

      Product Information

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


      • 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


      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.

      Please Note.These Headers are intended for left hand drive applications only.

      Fitment: 2015 2016 2017 2018 2019 2020 Details

      American Racing Headers MTC5-15178300BEXWC

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      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

      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

      Customer Reviews (7)

        Reviews of American Racing Headers Exhaust products have an average rating of 4.9 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

          • Bullitt - 19, 20
          • GT - 15, 16, 17, 18, 19, 20

          These Headers are intended for left hand drive applications only.

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