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Borla 1-3/4 in. XR-1 Long Tube Headers (11-14 GT; 12-13 BOSS 302)

AmericanMuscle no longer carries the Borla 1-3/4 in. XR-1 Long Tube Headers (11-14 GT; 12-13 BOSS 302). Please check out 2010-2014 Mustang Headers for an updated selection.

Features, Video & Details

  • Increases Horsepower and Torque
  • Long Tube Header Design
  • Free Flowing 1-3/4" Mandrel-Bent Tubing
  • Stainless Steel Construction
  • Natural Finish
  • For Off-Road, Track Use
  • Fits 2011-2014 5.0L GT and BOSS Mustangs

Review & Installation Video

Review & Install Video

So the Borla 1-3/4 inch Long Tube Headers will be for the S197 GT or BOSS 302 owners out there looking to go with a high-quality long tube to use in conjunction with a Borla cat-back exhaust system or a corresponding Borla X-pipe. Now these catless or off-road long tubes will fall right around a thousand-dollar price point, while that knuckle-busting install will get a full three outta three wrenches on the difficulty meter from me, with a little bit more detail to come later in the video. So when most people hear the name Borla, you probably think cat-back exhaust system, axlebacks, things like that. The headers are another one of the company's specialties and it makes sense because you're still in the exhaust realm. And just like the company's popular exhaust systems, the headers are extremely high-quality, both in materials and craftsmanship, along with that fitment as well, and that's something a lot of our customers have pointed out in that customer review section. But why go with a set of long tube headers in the first place? Well, simple, right, to get more power and more sound out of your naturally aspirated or blown Coyote engine. Now the final power numbers will depend on a few different factors such as your tune, your supporting mods, the dyno conditions, things like that. However, I would say that anywhere from 15 to 20-wheel at least to the tire would be a safe guess, along with a quality tune, maybe even a little bit more for those bigger supporting mods like forced induction. And along with the increased power, another big plus when adding a set of long tubes like the XR-1s from Borla here, is the noticeable increase in volume and growl to your exhaust system, whether it be a Borla Touring, the S-Type, or ATAK. And that does lead me to my next very important point. In order to run these long tubes without modification, you're gonna need to run either a complete Borla cat-back, which does include an X-pipe, or just simply grab the X-pipe by itself, which is Borla part number 60513. Now, if you do grab that X-pipe without the corresponding Borla cat-back exhaust system, there will no doubt be modification needed to get everything hooked up correctly. On the other hand, if you just simply buy the complete Borla cat-back system, again, whether it's the Touring, the S-Type, or the ATAK, there is going to be no modification needed to get everything up and running with the headers. And I just wanna make that perfectly clear here, guys, so there are no surprises when buying and, ultimately, installing. But I did briefly mention that Borla quality has been carried over from their cat-back exhaust systems to the XR-1 long tubes here, and that is certainly another huge plus when considering these particular long tubes. And what does that mean to you? Well, quality materials is a biggie. Sixteen gauge, 304-grade stainless steel throughout, including your laser cut 3/8 inch flange, the 1 3/4 inch primaries here which are gonna be your runners, and they have been left in that raw or natural finish, if you will, which should bronze up nicely after a few heat cycles. I also like how the XR-1s from Borla don't include a number of different pieces to make up each primary. Instead, most, if not all, with the exception of this guy right here, do feature a one-piece primary, from the flange all the way down to your 2 3/4 inch collector. And why do I like this? Well, any time you add a weld on a part that heats up and cools down frequently, like a header, it's just another area that is prone to cracking over time. So Borla and their one-piece primaries tend to alleviate that concern, in addition to the welds just being very smooth and very nice throughout. Great penetration and nice and smooth here at the head side, which is what you want. Listen, you don't want a rough weld to create a bunch of turbulence, especially this close to the head, because the key to a good exhaust system is maintaining exhaust velocity, and it seems like the welds here shouldn't introduce any extra turbulence to your exhaust flow. And then you have that 1 3/4 inch primary size or diameter, which will be one of your most common offerings or diameters in the Coyote aftermarket, along with your slightly larger 1 7/8 inch diameter. And look, guys, they're both gonna make great power over the factory manifolds you are replacing. But conventional wisdom might tell you that the smaller diameter primary will make slightly better torque at lower RPM levels, but be more of a restriction at the upper RPM level, especially as your power numbers start climbing. And what I will say is, guys, the difference for most setups is going to be pretty negligible. However, if you are leaning towards a forced induction setup, I might steer you towards the 1 7/8 inch primary in addition to a slightly bigger collector overall, but again, that's totally your choice. Speaking of making power, ideally, I would recommend pairing up these long tubes with a custom tune, not only to help you maximize your gains, but more importantly, to take into account the fact that you will be eliminating the cats with the off-road headers that we have here. Now if you don't, your secondary O2 sensors will probably trigger that "Check Engine" light once they realize the cats are no longer there. But let's move into the install briefly here, gang. And let me just tell you, this one most certainly will not be fun. Listen, long tube headers are always going to peg the difficulty scale, and the Borla's are no exception there. So expect a full-blown three outta three wrenches on the difficulty meter and at least a day or two in the shop or garage, depending on your expertise and your setup. Definitely recommend a big old set of tools for this one, along with doing this on a lift to make your life a whole lot easier. Now typically, you'll find three different schools of thought here. Number one, drop that to gain access. Number two, support the trans and the motor and drop the motor mounts. Or number three, just take it to a shop. But in all seriousness, guys, if you're not comfortable at tackling this in depth of an install, you might wanna contact your local speed shop. I'm sure they'll be happy to help you out with this job. So in closing, the Borla XR-1 Long Tube Headers are going to be an extremely nice albeit a tad expensive option that will work best with a Borla cat-back of your choice. Be sure to check out a set for your ride right here at

More Horsepower And Torque. Improve the performance of your 5.0L coyote Mustang throughout the entire RPM band with a set of Borla Long Tube Headers. These Borla Headers will greatly improve your 5.0 Mustangs exhaust flow over the restrictive factory manifolds to increase your Pony's horsepower and torque. Significant increases in rear wheel horsepower have been seen when installed with a matching Borla ATAK Cat-Back System.

Quality Construction. Borla Long Tube Exhaust headers are CNC mandrel bent from 1-3/4" 16 gauge aircraft-quality T-304 stainless steel tubing for unrestricted airflow. They feature one piece 3/8" header flanges for added strength, leak-free performance and an OEM style fit.

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

Required Upgrade. The Borla XR-1 Long Tube Mustang Headers will require the use of a Borla ATAK, Borla 'S' Type, or Borla Touring system with included X-Pipe for proper installation (See drop down option above).

Application. These Borla XR-1 Long Tube Headers are specifically designed to fit the 2011 to 2014 GT and BOSS 302 Mustangs equipped with the 4 valve 5.0L coyote engine.

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

Fitment: 2011 2012 2013 2014 Details

MPN# 17263

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Driver side header
  • (1) Passenger side header
Installation Info
Tech Specs
Header Specifications
Header Type: Long Tube Finish: Natural
Type Mid Pipe Required: ATAK Cat-Back with X-Pipe Fitment: 2011-2014 5.0 GT Mustangs
Will it fit my Mustang?

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      Questions & Answers (18)

      5 Top Rated Questions

      Oh okay! Is there anything to turn off the rear O2 sensor then to turn off the Cat Code? Thanks!

      • You will need a tuner to disable the rear O2 sensors.

      Helpful (1)

      What would be your recommended brand of header gaskets to go along with the header install? My Borla headers didnt come with gaskets. 2014 Gt is my pony btw

      I currently have the borla ATAK catback system. Can I run these LTH and have cat deletes? If not, is there a set of LTH I can have cat deletes with?

      • Yes, the Borla 1-3/4 in. XR-1 Long Tube Headers will work with the ATAK catback system you will just need to install a compatible catless x or h pipe.

      Helpful (0)

      Hello, I bought this headers for my 2013 Mustang GT, now I have 2016 Mustang GT and will this headers fit it? Maybe with Borla Long Tube Header Adapter or it will not fit at all? Thank you in advance.

      • No, unfortunately these headers will only fit the 2011 - 2014 Mustang GT and 2012 - 2013 BOSS 302.

      Helpful (0)

      Do these require oxygen sensor extensions?

      • The Borla 1-3/4 in. XR-1 Long Tube Headers will not require O2 Sensor extensions, however you will need to disconnect 1 clip on each side of the harness to allow enough free play in the wires to reach the headers.

      Helpful (0)
      Post Your Question
      10 More Questions
      If I want to replace the sensors for these, do I need 1 back and 1 front sensor? Or 2 of the same(if so which)? Is it best to just keep one sensor and disable the other?(per a pipe/side). 1 answer
      Would the borla attachment fit my ford performance x-pipe? 1 answer
      How do these headers match up with other exhaust brands? Or is just the x-pipe that depends on fitment? 1 answer
      I have a 2012 GT with Borla Touring, Borla over axle pipes, and Borla mid-pipe. Are these a direct bolt-on with the parts above? 1 answer
      So I currently have the Borla atak catback exhaust system, I am curious to know if there is any way of passing emissions with these Headers? I live in Nevada and they do computer tests here. I really want these paired of with what I have now! 1 answer
      Which X pipe would fit these long tube headers? I don't want the full cat back system just want a X pipe that will fit. 1 answer
      Will these headers bolt up to the borla atak gt500 cat back 1 answer
      Borla Exhaust I already have the Borla ATAK, axel back exhaust. I want to upgrade to the Borla long tube headers. What components do I need to complete the Borla exhaust system? 1 answer
      O2 senor extension when installing these with the Borla x-pipe and removing the cats, will you need an O2 Extension plug? 1 answer
      Do I need to buy the gaskets seperately from this purchase? 1 answer

        Customer Reviews (11) Write a Review

        Overall Rating 4.9

        out of 5 stars

        Installation Time:Weekend

        Installation Cost:$500-$1000

        • Performance Gain 4.909091 4.9
        • Fit 4.818182 4.8

        • 4/5

          Installation Time: Full Day

          March 26, 2018

          Great fitment. Nice power gain.

          Made the car sound incredible. They look great. Everything fit perfectly. They were much easier to install than the old headers were to remove. That being said.. There were some issues The supplied header bolts were the wrong thread pitch and we almost had an issue where the block was damaged. Luckily we didn't force the issue and reused the factory header bolts. I was a bit disappointed because I expected more from Borla. That being said, I found out that Ford had a design change somewhere during the year mine was built and there are two different thread pitches. I won't completely blame Borla for this, but that is just a warning for others before trying to force the supplied header bolts in. This one is more of me being picky. I was disappointed that no where on the headers is the Borla brand name. I know it isn't needed or anything, but I was hoping that would be welded or something on the header like other big brands. Just found it odd that someone like Borla wouldn't make sure their products had their name brand on it somewhere.


          Year: 2011 Submodel: GT

          Helpful (12)

        • 5/5

          Installation Time: Full Day

          July 03, 2017

          Great product

          Overall awesome product, great welds nice even bends. Does not come with manifold gaskets, it suggests you reuse old ones so depending on your mileage I suggest that you get some new ones before starting to prevent leaks. You wont need o2 extentions they will reach you just need to disconnect the little retainer at the top of the transmission. Comes with all new hardware but you only need to use some of it on pass side. This is a difficult install my friend and I are experienced technicians and it still took us about ten hrs. Well worth it all in the end, the sound is incredible with the Borla S-type cat back. So loud it set off car alarms as we were leaving the shop.


          Year: 2014 Submodel: GT

          Helpful (9)

        • 5/5

          June 18, 2017

          Borla XR-1 longtubes

          These headers are incredibly loud!! I have these and borla ATAK catback and geez is it loud!! Everywhere I go someone always compliments how great it sounds!


          Year: 2014 Submodel: GT

          Helpful (9)

        • 5/5

          Installation Time: Shop Install

          Installation Cost: $250-$500

          June 08, 2017

          Nasty Indeed

          I am running these headers with the matching Borla off-road X-pipe, LTH over-axles, into Corsa Extreme axle backs. VICIOUS and MENACING!!! The power is there and the setup breaks necks left and right 24/7, so make sure you want to wake the dead.


          Year: 2014 Submodel: GT

          Helpful (8)

        • 5/5

          Installation Time: Shop Install

          Installation Cost: $500-$1000

          April 05, 2016

          All I can say is, WOW!!

          These headers along with the 3" cat back exhaust system from Borla make one heck of an upgrade. I took these to the shop to have them installed due to not having access to a lift. It is a very intensive install and unless you are very savvy and have all the right gear, this should be done by professionals. That being said, I picked my baby up and as soon as I started her up, I knew that I had my monies worth. The sound is just great, nothing compares to Borla's quality and they have proven once again that they know how to make a Mustang sound mean. Also, these are a bit pricey, but the guys at the shop said that due to the excellent fitment, I was saved about 200 dollars in labor. The price is well worth it in my opinion.


          Year: 2014 Submodel: GT

          Helpful (8)

        • 5/5

          Installation Time: Full Day

          November 19, 2015

          Borla xr-1 longtubes

          Took about 8hrs total to install. I did mine by removing the k member. Gives you alot more room to work. Instruction well there might as well be none. If you've wrenched on cars before this should be no problem. Tuned on the dyno with hp tuners netted 414.4 whp and 395 foot pounds of torque. Only mods is the longtubes and full borla catback.


          Year: 2013 Submodel: GT Zanesville ohio

          Helpful (10)

        • 5/5

          Installation Time: Full Day

          June 01, 2015


          I had my mechanic install the headers for me as well as the catback borla atak exhaust system. It took a full day to install everything. So I had a full day full of suspense of hearing and driving my mustang GT 2014. But all I needed was to start the car and hear my Stang ROAR and I loved it. Driving back home I loved my exhaust even more. Getting looks and people cheering my car on. Thanks American Muscle, this is a great product.


          Year: 2014 Submodel: GT Miami, FL

          Helpful (10)

        • 5/5

          Installation Time: Shop Install

          Installation Cost: $500-$1000

          July 18, 2014

          Great quality and great performance

          Although these headers are more expensive than most brands, the build quality and fit more than make up for it. Unless you have the patience and the tools (i.e. lift), I recommend that you have these installed by a pro. They had to drop the k-member to do the install properly. I installed these with the Borla x-pipe (cat delete) and the Borla catback system with s-type mufflers. The sound at idle is fairly loud, but aggressive. The sound at full throttle will make the ground shake. The headers, x-pipe and catback system with tune definately added power. I have not had a chance to dyno the car yet, but will shortly in the future. Great product!


          Year: 2011 Submodel: GT Cincinnati, OH, USA

          Helpful (9)

        • 5/5

          Installation Time: Weekend

          April 25, 2014

          Loud, Proud, and WOWED!

          Oh boy. These babies are LOUD. I already had a Borla S-Type catback but these bad boys just scream. Cruising on the highway they sound about the same but a little deeper... but as soon as you touch the throttle is sounds the gates of h*** are opening. Needless to say, I'm a fan. I don't currently have cats anymore, my county doesn't require emissions as of now so if you go that route, it will smell a little different without the cats and backfire here and there... which I get a little chuckle out of.. and did I mention it's loud? Now, on to installation. Hubbah! These took me and a buddy about 2 8hour days in my garage. I used jack stands and a few man powered wrenches and sockets. Getting to some of the bolts on the stock headers were a pain in the butt. The "instructions" that Borla included were a joke to say the least (it basically tells you to go to a shop), and they sent me the wrong bolts for the new headers... the threads weren't the same to bolt to the engine. I had to remove the battery, the starter, cross member, my airbox, the steering shaft, both motor mounts, and jack the engine up. The driver side went in without any issues, the passenger side was a pain in the but because of the air conditioning unit. But nothing that someone with a bit of know-how can't tackle. I will say that bolting these on vs taking the stock ones off are WAY easier. Do I recommend? Yes. Just make sure you leave yourself plenty of time and get a tune.


          Year: 2011 Submodel: GT Brigham City, UT

          Helpful (12)

        • 5/5

          Installation Time: Weekend

          October 23, 2013

          Xr-1 LT Headers

          Ordered these headers one thursday morning and had them delivered the following thursday. Delivery took longer than expected but as always, im very satisfied with my purchase. I am no mechanic and installing these was a pain! Overall, the fit was great and as always the cars performance was greatly increased. waiting to put her on the dyno next month. Thanks A.M


          Year: 2013 Submodel: GT Pilot point, tx, USA

          Helpful (10)

        • 5/5

          Installation Time: Full Day

          September 22, 2013

          Borla Long tubes!!! Amazing!!!

          Very costy but it is worth it!!!!!! Changed from shorties to long tubes and I won't go back. This long tubes werent as hard to install pretty simple all the way if you also have the cat back exhaust. It made my car much lighter and much louder and what can I say much faster!!!! Recommend this item to anyone with a stang:)


          Year: 2012 Submodel: GT Houston, TX, USA

          Helpful (11)