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Stainless Works 1-7/8 in. Long Tube Headers & Off-Road X-Pipe Kit (11-14 GT)

Market Price $1,635.00 You Save 5% ($81.75)
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  • Item 101824

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Features, Video & Details

  • Increases Horsepower and Torque
  • Raspy Race Car Growl
  • Long Tube Header Design
  • Free Flowing 1-7/8" Mandrel-Bent Tubing
  • Stainless Steel Construction - Natural Finish
  • Matching Off-Road Shorty X-Pipe Included
  • For Off-Road, Track Use Only
  • Designed and Manufactured in the USA
  • Fits 2011-2014 GT Mustangs

Review & Installation Video

Review & Install Video

Hey, guys, Stephanie with, here with a review of the Stainless Works long tube headers that come with an off-road X-pipe, available for 2011 to 2014 GT Mustangs. In this video we're going to be looking at a few different things in regards to this kit. We're gonna talk about the materials and construction of the headers and the mid-pipe, and the install, too. We'll talk more about this later, but I can tell you right now that long tube headers make for a difficult install, so I'm gonna call this one a three out of three wrenches in the difficulty meter. This kit from Stainless Works that includes long tube headers and a matching mid-pipe are going to be a good option for someone looking for a natural finish, off-road long tube header for both performance and sound gains. This kit comes with a matching shorty mid-pipe and makes way for a continuing three-inch catback. If we start with the heart of this kit, we'll be looking at the headers. Long tube headers are gonna 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 a larger runner and NA cars running a smaller runner, but I wouldn't really say that that's a hard and fast rule, especially with the Coyotes. So 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 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. But once you spin the Coyote motor up, the larger diameter is gonna help keep things moving, so what you're gonna see are top end gains. Getting into the specifics here, these are a 304 stainless steel header that have a natural or raw finish, which is gonna 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 a 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 do get to see the beautiful welds since these have that raw finish. This is mandrel bent tubing, which is gonna help with smoother air delivery. The primary tubes then merge down into a three-inch collector, and then you have your mid-pipe right here which is an X-pipe. Typically speaking, we see X-pipes producing more of a louder, raspier sound than a deeper sound, especially when you compare it to the sound of an H-pipe. This mid-pipe is a three-inch mid-pipe, so just keep that in mind, too. If you guys didn't know already, when you change your header setup to a long tube setup, you also need to change your mid-pipe to a shorty mid-pipe to work with the long tubes. It's nice to see that these are already paired for you. It takes the guesswork out of the equation. If we move on to price, as we all pretty much know, or you'd know if you'd been shopping for long tubes, that they're pretty much gonna be a solid investment. They're pricey and they're difficult to install. This option from Stainless Works, since they are a higher quality item that's more at the top of the food chain, are gonna be on the more expensive side. The one and seven-eighths inch option that we have here are all gonna be slightly more expensive, which isn't unusual to see. You do tend to see larger runners costing more than smaller runners, but not usually by very much at all. You're looking at spending right about $1,400 for this kit, which does give you a little bit of a price break than if you were to buy these two pieces individually. But do keep in mind that you won't have to buy a shorty mid-pipe in order to install these since it already comes with the kit. This price tag is why I called long tube headers an investment earlier. 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 Stainless Works that's gonna be expensive. You'll be looking at headers costing over $1,000 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 gonna be a full three out of three wrenches on the scale and a day in the garage, especially considering that you're gonna be installing this mid-pipe with the headers. You can do this on a jack and stands but a lift would make this easier, for sure. You're gonna 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 a little bit more room. Having a helping hand in this case is really gonna benefit you. 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 Works long tube off-road headers, these are a 304 stainless steel header that comes with a matching X-pipe for a mid-pipe, and both pieces are a full three-inch. The headers have one and seven-eighths inch runners. As usual, you can check them out more online for yourself right here at

More Horsepower And Torque. Improve the performance of your 5.0L coyote powered Mustang throughout the entire RPM range with a Stainless Works Long Tube Header and Off-Road Shorty X-Pipe combo kit from AmericanMuscle. This Stainless Works Header and X-Pipe kit will greatly improve your 5.0L Mustangs exhaust flow over the restrictive stock manifolds and Mid Pipe to significantly increase your Pony's horsepower and torque.

Superior Construction. Manufactured in the USA from 1-7/8" mandrel bent 304 stainless steel tubing for superior airflow, Stainless Works Long Tube Exhaust Headers are TIG welded and feature a one piece 3/8" thick header flange for added strength and optimal leak-free performance.

Race Car Growl. The included Stainless Works 3" diameter 304 stainless steel off-road X-Pipe not only improves exhaust flow to increase power, but it also adds a crisp raspy, race car growl to the sound of your Mustangs exhaust with its modern merged "X" crossover design.

Recommended Upgrade. To realize the full power potential that this Long Tube Header and Off-Road Shorty X-Pipe combo kit has to offer, AmericanMuscle highly recommends a Bama custom tune with a Mustang Handheld Tuner to reprogram the vehicles computer (ECU) for proper operation.

Application. This Stainless Works Long Tube Header and Off-Road X-Pipe combo kit is specifically designed to fit the 2011 to 2014 GT Mustangs equipped with the 32-valve DOHC coyote 5.0L V8 engine.

Technical notes. Not legal for use on pollution controlled motor vehicles; intended for off road use only.

Fitment: 2011 2012 2013 2014 Details

What's in the Box
  • Long Tube Headers
  • Off-road X-Pipe
Installation Info
Tech Specs
Header Specifications
Header Type: Long Tube Finish: Natural
Type Mid Pipe Required: Shorty - Included Fitment: 2011-2014 GT Mustangs

Mid Pipe Specifications
Style Mid Pipe: Shorty "X" Type Headers Required: Long Tube - Included
Piping Material: Stainless Steel Piping Size: 3"
Catalytic Converter: "No" - For off-road use only Fitment: 2011-2014 GT Mustangs
Will it fit my Mustang?
  • GT - 11, 12, 13, 14

Most Helpful Reviews

loud and proud!!!

After a long time of research I finally bit the bullet and bought some headers I decided to go with stainless works because I couldn't find anything negative on them and now I see why. Right out of the ...

Read More
Helpful (2)

nice headers

The headers are pricey but are very well made. I have a 2012 GT with a custom dyno tune, BOSS 302 intake and a Steeda CAI. The headers and off-road X pipe added 17.8rwhp.

Helpful (1)

Overall Rating 4.4 out of 5 stars
Read All 5 Reviews

Customer Photos

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7 Questions / 6 Answers

Ask a Question

After the Mid pipe? What will I need to connect the rest of my exhaust, I want this to bolt up to my GT500 Axle backs


  • Yes, this uses the OEM slip fit mid-pipe so any axleback system, roush, GT500, or other should work so long as it keeps the stock design. the OEM exhaust should even work with it as well.


Helpful (1)

Will this fit the Boss 302?


  • These Stainless Works Long Tube Headers & Off-Road X-Pipe combination kit were specifically designed to work with GT's only.


Helpful (0)

Any ground clearance issues for lowered cars?


  • This would all depend on how low your car is to the ground now. Doing long tube headers will sit lower then the factory manifolds and will cause less clearance.


Helpful (0)

will this fit my mbrp cat back


  • The MBRP catbacks have a piping size of 3" in diameter which will mate up to the shorty X-pipe that is in this header and mid-pipe combo.


Helpful (0)

Will the mid pipe included with these headers match up to my outlaw car back


  • If you have Flowmaster Outlaw axle back then yes it will. But if you have the cat back then it will not.


Helpful (0)

Will this fit with my borla Atak catback


  • These exhaust kit comes with both the headers and x-pipe while the Borla ATAK cat-back comes with the x-pipe and mufflers. You may just want to get the headers alone if you already purchased the cat-back.


Helpful (0)

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Customer Reviews (5) Write a Review

Overall Rating 4.4

out of 5 stars

Installation Time:Full Day

Installation Cost:$500-$1000

  • Loudness / Volume 4.8 4.8
  • Exhaust Note 4.8 4.8
  • Fit & Finish 4.6 4.6
  • Bang For Your Buck 4 4

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $500-$1000

    October 18, 2014

    loud and proud!!!

    After a long time of research I finally bit the bullet and bought some headers I decided to go with stainless works because I couldn't find anything negative on them and now I see why. Right out of the box the headers and pipes were In excellent condition with perfect welds stamped with the sw badge. I decided to have a local shop do the install because of time and its my daily. The shop installed the headers in a day (about 10 hours) and charged me 790 after taxes which seems to be the price for reputable good quality shops. I asked the tech who installed them if they caused him any trouble and he said it was a factory fit with no issues at all, he said you get what you pay for and these were great quality. I have the roush axle backs also and no resonators and man is it loud! Not the bad kind of loud though, IF you can stay out of the throttle you can keep it quiet (below 2500 rpms) but who wants to do that?! When you hit the throttle it screams and heads turn. I've received numerous compliments from people every day I take it out. As far as performance goes you can definitely feel gains. I have other bolt one as well and a SCT tuner with tunes from Bama. The headers added that extra power I needed to be satisfied for a while, I recommend anyone who likes a loud mustang that will pack a punch to invest in these they are worth every penny. Remember you get what you pay for these are worth spending the extra money for the quality fitment and performance.


    Year: 2011 Submodel: GT Knoxville, TN, USA

    Helpful (2)

  • 4/5

    March 21, 2017

    nice headers

    The headers are pricey but are very well made. I have a 2012 GT with a custom dyno tune, BOSS 302 intake and a Steeda CAI. The headers and off-road X pipe added 17.8rwhp.


    Year: 2012 Submodel: GT

    Helpful (1)

  • 3/5

    Installation Time: Afternoon

    February 09, 2017

    Headers fit great, Xpipe 8" too short!!!

    Headers fit really nice, Xpipe was about 8" too short. Had to go to a muffler shop and spend another $100 for them to make a piece for them to fit to exhaust properly.


    Year: 2012 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    July 17, 2015

    Excellent headers

    Out of the box excellent good looking headers little pricey but u get wht u paid for for installation took about 4 hours on a lift driver side was done in about 1 hour passenger side took longer cause of the first bolt was a pain to get to. But once we got it we cruise on the installation. Fitment was perfect and clean no issues and the sound is excellent I got with an off road x pipe I love it even more now. Shipping was extremely fast for such a big item I got in 2 days .


    Year: 2013 Submodel: GT Miami

    Helpful (0)

  • 5/5

    Installation Time: Full Day

    May 30, 2014

    Awesome product! Good fit, perfect sound, great power

    These installed like a breeze compared to other long tube headers, they sound amazing and it is definitely a noticeable power increase. Can't wait to strap the car to the dyno now!


    Year: 2014 Submodel: GT Philadelphia, PA, USA

    Helpful (0)

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