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Stainless Power 1-7/8 in. Long Tube Catted Headers (15-17 GT)

Market Price $1,408.97 You Save 12% ($162.09)
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  • Item 390796-A

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    Features, Video & Details

    • Increases Horsepower and Torque
    • Long Tube Header Design
    • High-Flow Catalytic Converters Included
    • 1-7/8" Primary Tubes with 3" Collector
    • 3" Catted Connection Pipes (Steps Down to 2.5")
    • Free Flowing Mandrel-Bent Tubing
    • 304 Stainless Steel Construction - Natural Finish
    • Intended for Off-Road, Track Use Only
    • 24-Month Guarantee on Material and Workmanship
    • Designed by Stainless Works
    • Fits Left Hand Drive Models Only
    • Fits 2015-2017 GT Mustangs with Factory 2.5" Exhaust

    Review & Installation Video

    Review & Install Video

    Hey guys, Stephanie with, here with a review of the Stainless Power Long Tube Catted Headers 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 these headers. We're going to talk about the materials and construction of the headers themselves and the install, too. I'll talk more about this later on, 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. The Stainless Power Catted Long Tube Headers are going to be a good option for someone looking for a natural finish stainless steel long tube that's going to maintain the use of cats and maintain three-inch connection pipes, but that'll step down to two-and-a-half inches for a cat-back. The connection pipes that come with these headers are three-inch catted pipes that have a step down which means that you'll need a two-and-a-half inch cat-back. 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-eighths inch which is slightly different than the one-and-three-quarter inch offering. Traditionally you see forced induction cars running larger runners and NA cars running smaller runners, but I wouldn't really say that that's a hard and fast rule especially with the new Coyotes. So you don't have to have a power adder to run a one-and-seven-eighths inch diameter. You just need to keep in mind your current mods and the goals you have for your car when you're looking around as well as what going with this size runner will do to your power band with the mods that you have. If you have some bolt-ons and you're still NA, you might see a hit on your low-end torque. Once you spin the Coyote motor up the larger diameter is going to help keep things moving, so what you're going to see are top end gains. Getting into specifics here, these are a 304 stainless steel header that has a natural or 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 do not have a ceramic coating either, they are made from that 304 stainless steel tubing, so you won't have to worry about corrosion. This is mandrel bent tubing which is going to help with smoother air delivery. The header flanges here are also laser cut, and they do that to prevent leaks and create a good fit. The primary tubes then merge down to a three-inch collector with Venturi style merge spikes that are going to optimize exhaust flow. Then, you have your connection pipes here. Like I said earlier they're three-inch and they are catted, and they're going to step down to two-and-a-half inches. That means you can bolt up your factory cat-back or an aftermarket two-and-a-half inch one, so you have some flexibility there.If we move on to price, as we all pretty much know, or you'd know if you've been shopping for long tubes, that they're pretty much going to be a solid investment. They're pricy, and they're difficult to install. This option from Stainless Power since they are a higher quality item made from great materials are going to be on the more expensive side. Not to mention the one and seven-eighths inch option that we have here is going to be slightly more expensive, which isn't unusual to see when you compare it to a smaller runner. You do tend to see that the larger runners cost more than the smaller runners, but not usually by very much at all. You're looking at spending just over $1100 for a set of these right here, but you do have to keep in mind all the benefits and power that you'll be getting from this setup. And to put things in perspective, it's not just these headers are going to be expensive. You're going to be looking at headers costing very close to or over $1000 anyway no matter what brand you go with. 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 to just 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. 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 tricky which is why you need to pull a 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 Stainless Power Long Tube Catted Headers, these are 304 stainless steel headers with one-and-seven-eighths inch runners and three-inch collectors that run down to three-inch connection pipes that'll step down to two-and-a-half inches. As usual, you can check them out more online for yourself right here at

    More Horsepower And Torque. Does your GT Mustang spend equal time on the street, strip and track? Then you really need to replace those restrictive cast factory manifolds with a set of Stainless Power Long Tube Headers for the power you need to defeat your competition. Stainless Power Headers feature a pair of high flow catalytic converters and venturi style merge spikes to optimize exhaust flow as well as improve exhaust scavenging. As a result, these Long Tube Headers will dramatically increase the rear wheel horsepower and torque of your Pony throughout the entire RPM range. Stainless Power's Long Tube Catted Headers are perfect for those GT owners who are on a quest for more power and better performance, without the need of breaking their piggy banks.

    High Flow Catalytic Converters. Stainless Power's high flowing catalytic converters are engineered to outperform the restrictive stock cats. The included high flow catalytic converters provide a significant increase in exhaust flow for a measured improvement in horsepower and torque at the rear wheels.

    Superior Construction. Stainless Power Headers are manufactured to Stainless Works exact design specifications. Stainless Power Headers are CNC mandrel bent from 1-7/8" diameter, 304 stainless steel tubing for excellent exhaust flow and long lasting corrosion resistance. These Long Tube Headers feature TIG welded construction, as well as laser cut 3/8" header flanges for additional strength and leak-free performance.

    24-Month Guarantee. Stainless Power is Stainless Works value-line brand of exhaust products designed for the cost conscious consumer that wants a high-quality product at a reasonable price. Stainless Power is so confident in the quality of their Long Tube Headers that they are backed by a 24-Month guarantee on material and workmanship.

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

    Application. These Stainless Power Long Tube Catted Headers are specifically designed to fit the 2015 to 2017 GT Mustang equipped with the Coyote 5.0L DOHC V8 engine. These headers and connector pipes are a direct bolt on to the stock 2.5" exhaust system.

    Technical Note. Not legal for use on pollution controlled motor vehicles; intended for off road use only.These Headers are intended for left hand drive applications only.

    Fitment: 2015 2016 2017 Details

    What's in the Box
    • (1) Driver Side Header
    • (1) Passenger Side Header
    • (1) Driver Side Connection Pipe
    • (1) Passenger Connection Pipe
    • (2) High-Flow Catalytic Converters
    • (4) Clamps
    • (2) O2 Extensions
    • Hardware
    Installation Info
    Tech Specs
    Header Specifications
    Header Type: Long Tube Type Mid Pipe Required: Stock Factory
    Material: Stainless Steel Finish: Natural
    Catalytic Converter: "Yes" - For off-road use only Fitment: 2015-2017 GT Mustangs
    Will it fit my Mustang?

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    14 Questions / 13 Answers

    Ask a Question

    Will this fit 2016 GT with Borla Quad-Tip Catback exhaust by Ford Performance? Any other needed parts for install?


    • Yes, these headers will work with the Ford Performance by Borla exhausts that are 2.5" and will be a bolt on installation.


    Helpful (0)

    Will these headers fit my 2018 Mustang GT W/ X-pipe and factory Active exhaust?


    Will these headers fit the AWE Touring cat-back system since it also reduces to 2.5" to mate with factory cats. Also would there need to be a shorter mid pipe if connecting to AWE system?


    • Yes, these headers are compatible with aftermarket exhausts that are 2.5" like the factory exhaust sytem.


    Helpful (0)

    i have the Borla Sport 2.5" cat back quad exhausts on my car, will these headers fit OK. cheers,


    • Yes, these headers are compatible with the Borla Sport 2.5" cat-back exhaust.


    Helpful (0)

    Will this fit my ford racing Xpipe??


    • The Stainless Power 1-7/8 in. Long Tube Catted Headers will work with a Ford Performance X Pipe.


    Helpful (0)

    I already have a tune on my GT, will I have to get another tune when I add these Headers?


    • Yes, after adding the Stainless Power 1-7/8 in. Long Tube Catted Headers, your stang will require a new tune.


    Helpful (0)

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    Customer Reviews (8) Write a Review

    Overall Rating 5

    out of 5 stars

    Installation Time:Weekend

    Installation Cost:$250-$500

    • Loudness / Volume 4.75 4.8
    • Exhaust Note 4.75 4.8
    • Fit & Finish 4.5 4.5
    • Bang For Your Buck 4.75 4.8

    • 5/5

      Installation Time: Full Day

      June 21, 2018


      Fitment was perfect. No issues on the install. Sounds amazing. Definitely a must have.


      Year: 2016 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      April 26, 2018

      Good value and bang for the buck.

      Stainless Works did the design and materials and the cost is less. Look to be of really good quality I will be installing soon.


      Year: 2016 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Weekend

      March 19, 2018

      Stainless Power

      I think these headers are a good bang for the buck.. sounds amazing, I was going to get the Kooks, however I am very happy with these.


      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Full Day

      March 04, 2018

      loud as can be

      I absolutly love this product! I have these headers paired with bola attak 3'' exhaust and man does it scream! these headers made the difference in sound. if you want everybody and there mother to hear you, these are what you need. my neihbors now hate me but its worth it for these headers. only down side is I did notice a slight loss in low end tq


      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      June 07, 2017

      creates great power, sound is so great.

      if you know your way around the garage you can put these on, fit is great and looks great under the hood. everything went together really well. Stainless Works - works!! they created a great kit.


      Year: 2015 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Weekend

      December 10, 2016


      Me and a friend installed them in my garage over a weekend. The difference between the stock headers and these are absolutely massive. I thought my Mustang was loud before but I sure was proven wrong when I fired it up after the install. Just idling you can hear the power coming from the exhaust. My cold starts where so beautifully loud that BAMA had to dial them back because apparently my Home Owners Association doesn't appreciate it like I do at 5AM every morning. Besides the sound, the power and results just blew me away. It's an entirely different car and I was not prepared for what I was going to witness. You can feel the massive increase immediately. It's not a small increase either, it's noticeably large and I love it. Like my buddy always said regarding performance parts... There's your bolt ons, there's your tune, then there is headers. Buckle up.


      Year: 2016 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Full Day

      September 14, 2016

      Great power gains.

      The headers come out with very good quality in all points. I would not even notice they are manufacture overseas. I can feel an increase in power together with a tune from Bama. The engine is more responsive and also my Borla Stype catback is a bit louder at WOT only but still sounds fantastic, like a race car. I have received lots of compliments about the sound. My only issue is that the passenger side header is slightly touching the frame when I turn left causing small vibrations. But I'm pretty sure I will be able to fix it.


      Year: 2015 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      June 15, 2016

      Quality at a reasonable price

      I had a local shop install the headers which did take longer than anticipated. Considering the cost and the gain in performance these are a must have. My 2015 GT put down 427hp and 408tq to the tire with a combo of cold air intake, headers and catback exhaust, all of this on 91 pump gas and cutom tune.


      Year: 2015 Submodel: GT

      Helpful (3)

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