Stainless Works Mustang 1-7/8 in. Long Tube Headers & High Flow Catted X-Pipe Kit M11HDRCATX (11-14 GT)

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

11 Reviews 12 Answers

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Item 101825

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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 High-Flow Catted Shorty X-Pipe Included
Intended for Off-Road, Track Use Only
Designed and Manufactured in the USA
Fits 2011-2014 GT Mustangs

Product Resources

Customer Photos (2) Customer Reviews (11) Questions (11) & Answers (12)

Review & Installation Video

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 Catted 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 factory 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 high-flow catted 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 Catted 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 Catted 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. This Stainless Works product may not be legal for use on pollution controlled motor vehicles; intended for off road use only.

Fitment: 2011 2012 2013 2014 Details

MPN# M11HDRCATX

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

What's in the Box

Long Tube Headers
Catted X-Pipe

Installation Info

Installation Time: (approx) a Day

Difficulty Level:Mechanical expertise or professional installation required.

Installation Guides:

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:	"Yes"	Fitment:	2011-2014 GT Mustangs

Tech Guides:

Will it fit my Mustang?

GT - 11, 12, 13, 14

Questions & Answers (11)

5 Top Rated Questions

Will I need to purchase o2 extensions for this kit?

This kit comes with an o2 extension and all hardware needed for the install!

Helpful (0)

Would these pass emissions in Pennsylvania?

This Stainless Works 1-7/8 in. Long Tube Headers & High Flow Catted X-Pipe Kit may not be legal for use on pollution controlled motor vehicles as it is designed for off-road/track use only. We would recommend speaking with local authorities regarding specific emissions regulations in your area.

Helpful (0)

Installing these. Can I still use my stock front sway bar?

This Stainless Works Long Tube Headers & High Flow Catted X-Pipe will still allow the use for the factory front sway bar.

Helpful (0)

Will I be able to use the Flowmaster Outlaw AxelBacks with this setup?

The MP Concepts GT350 Style Front Bumper Kit would be compatible with the Stainless Works 1-7/8 in. Long Tube Headers & High Flow Catted X-Pipe Kit.

Helpful (0)

I'm looking at putting these on my daily, the description says off-road use in most cases even though you'd still have cats on, so my question is after a tune would these be able to pass inspection in say Texas?

The Stainless Works Long Tube Headers and High Flow Catted X-Pipe Kit are designed as an off road product. We cannot say if these would or would not pass Texas emissions, as we do not know all of the laws and regulations. The best bet would be to check with a local emissions inspector.

Helpful (0)

Not finding an answer? Ask your question! Post Your Question

6 More Questions

If I were to purchase would my car throw a check engine light? If I don't get the Bama power flash tuner? 1 answer

Your car will throw a check engine light as you will be changing the size of the headers, the flow rate and the location of the O2 bungs. You will need to have Bama or another tuning specialist retune your vehicle to accommodate the new changes in your exhaust setup.

Helpful (0)

I have Roush Axlebacks on my Mustang, the rest of the exhaust system is stock. Would I have to cut anything or if I just give the pipes and headers to a shop would they be able to put them on without problem? 1 answer

You should not need to cut anything in order to install these headers and x-pipe. They will clamp on to the factory over axle pipe. We do recommend getting a tune for this set up. If you already have a Bama tuner, you can simply request a new tune. Though, if you do not, you may be interested in the Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (11-14 GT, 12-13 BOSS), item # 101200G11, (http://www.americanmuscle.com/x4-custom-tuner-2011gt.html). The tunes will adjust the car to the increased airflow, thus creating more power.

Helpful (0)

What's is the difference between this one and the stainless power ones (Item 390793-A 390793-A)? 1 answer

The only difference between the two kits would be that item # 101825 comes with a natural finish while item # 390793-A is simply a stainless steel construction. They are both made from 1-7/8" mandrel bent 302 stainless steel tubing with a 3/8" thick header flange. Both also include an x-pipe. Though, Stainless Power Long Tube Headers w/Factory Connect gives you the option of having an off-road or catted x-pipe while the other does not.

Helpful (0)

Will these hook up to a flowmaster outlaw catback exhaust? 2 answers

Hi, This Stainless Works Long Tube Headers and High Flow Catted X-Pipe Kit should be used with a catback that does not come with a X-pipe the flowmaster outlaw catback exhaust for both the 11-12 and 13-14 come with preinstalled X-Pipes.
The Flowmaster Outlaw Cat-Back Exhaust w/ X-Pipe - Stainless Steel (13-14 GT), item # 18444, (http://www.americanmuscle.com/flowmaster-ss-outlaw-catback-13gt.html) comes with an X-Pipe. In order to make the Headers and this Cat-Back work together, you can only use one X-Pipe. Also, they will not be a direct bolt on to each other. This installation will require you to do some modifications. We recommend professional installation of these parts.

Helpful (0) Show 1 more answer

How will these work with a VMP stage 2 super charge? For some reason it won't let me pick a sub model... 2013 GT 1 answer

Yes, these headers will fit with a supercharger as the supercharger does not modify the exhaust. They will require a re-tune.

Helpful (0)

Just wondering does this system also fit the 12-13 Boss? I would assume it would seeing as how they are both 5.0's and of the same design. Just curious if these do not then what headers do fit the Boss 302? Also looking at catbacks as well I see models for the GT but not the Boss is this the same case as well. Thanks for the help. 1 answer

These headers will work with the Boss 302 model as well. The only problem you will face is the Boss 302 is equipped with the specific H pipe with that will have the cut outs that come out the side of the car as well as different diameter piping. You will either need to have that mid pipe adapted to fit the headers or purchase the matching mid pipe and have it mounted to the car.

Helpful (0)

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Customer Reviews (11) Write a Review

Overall Rating

4.9

out of 5 stars

Installation Time:Full Day

Installation Cost:$250-$500

Loudness / Volume 4.818182 4.8
Exhaust Note 4.909091 4.9
Fit & Finish 4.909091 4.9
Bang For Your Buck 4.545455 4.5

no one in the world ever gets what they want, and that is beautiful

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5/5

Installation Time: Afternoon

November 27, 2017

Awesome sound

Really woke up the car , highly recommend had zero fitment issues. These paired with roush mufflers are amazing

Stevenw

Year: 2011 Submodel: GT

Helpful (6) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
5/5

Installation Time: Full Day

September 12, 2017

Incredible!

These long tubes make the car sound insane! I have it paired to the Borla Atak and the car screams! There's no drone cruising around town or even on the highway at 70-75. It's only loud when you crack the gas. The car pulls much harder now (thank you to Bama with the tune). They are worth every penny. The install is a pain, didn't do it myself and paid for it but I know it's in there and done properly. Shop said the fit and finish on them is incredible so definitely worth the money for power as well as fit.

DomC

Year: 2014 Submodel: GT

Helpful (5) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
5/5

Installation Time: Shop Install

Installation Cost: $500-$1000

May 30, 2017

Great product

Great fit and finish, you get what you pay for. The sound with these is great. Power gains were noticable

ZaideD

Year: 2014 Submodel: GT

Helpful (7) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
5/5

Installation Time: Full Day

April 25, 2017

Great headers overall

If you want to avoid the possibility of dealing with any fitment issues, you can't go wrong with spending a few extra bucks on these headers. The x-pipe it comes with bolts on perfectly to the stock exhaust that connects to your axle-back/mufflers. If you want to keep your cats, there aren't many options on the market right now; this kit does an awesome job of letting me pass inspection while not restricting airflow. I felt a noticeable gain in power in 2nd and 3rd gear especially. They're so incredibly loud when you get on it and I personally love it. At cruising speed it's like all you have is an axleback, no drone whatsoever. Install was not easy on jack stands, took a full day, but most of the time was spent removing the old headers. I couldn't get the downpipe separated from the stock headers; spent about 2 hours working on the bolts and then decided to cut the old exhaust at the h-pipe and just pull the entire header/downpipe off at once (this is a good option if you have rusty bolts and don't need your old exhaust, there's plenty of space in the engine bay to wiggle it out in one piece). Overall, well worth it in my opinion, but definitely not something I'd want to do again if I wasn't getting paid and didn't have a lift! As far as sound goes, I have it paired with roush axlebacks and it sort of keeps the raspy roush tone, but much much angrier :)

Z

Year: 2014 Submodel: GT

Helpful (13) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 4
  4
5/5

Installation Time: Full Day

February 24, 2017

stainless works headers

my mustang sounds incredible noticed the front end lift more on the first hit of the gas car is screaming!!!! cant wait for track to open to get a time slip

BobB

Year: 2013 Submodel: GT

Helpful (7) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
5/5

Installation Time: Full Day

February 15, 2017

Happy with my purchase

They made a noticeable difference in power and love the way that my car sounds now .

KirkM

Year: 2012 Submodel: GT

Helpful (10) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
5/5

Installation Time: Shop Install

Installation Cost: $100-$250

September 29, 2016

Stainless Works Long Tube Header 2013 Mustang GT

I had them installed by a professional. I could notice the added HP and torque, how much don't know but it's noticeable. The sound is deep and rumbly exactly what I was looking for. All in all a good product and definitely worth it.

jimaki141

Year: 2013 Submodel: GT

Helpful (7) Thanks for your input!
- Loudness (Volume) 4
  4
- Exhaust Note 4
  4
- Fit & Finish 4
  4
- Bang for your Buck 4
  4
4/5

Installation Time: Full Day

May 12, 2016

Loud and pricey

My 2012 had Roush axlebacks on it, holy s*** is it loud now. As far as performance, i cant say it justifies $1600, but the sound, thats worth a good amount. Install wasnt for beginners, pay somebody if u dont have a lift. Necks are snapping when i drive by, that part is fun. If its sound you want buy it, if it's power you want, keep saving for the supercharger.

BlackedOutRacing

Year: 2012 Submodel: GT

Helpful (7) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 3
  3
5/5

Installation Time: Full Day

December 23, 2015

perfect fit, wicked sound

Took six hours on lift with an extra hand, fit, finish and sound are spot on. Tons of clearance around steering, great ground clearance as well. Instructions were useless, and the o2 extension is garbage and won't make a connection, so I got a cel. Would recommend buying a new o2 sensor,from the raptor that is 18 inches long. But overall product is awesome!

zghsvt

Year: 2014 Submodel: GT indian trail nc

Helpful (9) Thanks for your input!
- Loudness (Volume) 4
  4
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 4
  4
5/5

Installation Time: Weekend

August 30, 2015

Best headers out there

Very loud! Nice hp gains. Definitely get a lot of head turning while I'm driving down the road. Nothing compares to stainless works

Mustang219

Year: 2014 Submodel: GT Crown Point, IN

Helpful (5) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
5/5

Installation Time: Full Day

June 09, 2014

Best investment!

The installation was rough, took almost a full 24 hours of work. High recommend following the instructions provided by Stainless Works, but be prepared they are very vague and we ran into some minor issues. Absolutely worth the work! The car just sounds unreal! I can definitely feel a big difference in HP gains, also some minor MPG gains as well.

Phoenix0823

Year: 2013 Submodel: GT

Helpful (5) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5

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

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