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Flowmaster Outlaw Axle-Back Exhaust (13-14 GT)

Flowmaster Outlaw Axle-Back Exhaust (13-14 GT)

Name: Flowmaster Outlaw Axle-Back Exhaust (13-14 GT)
Brand: Flowmaster
SKU: 18445
Price: 465.95 USD
Availability: InStock
Rating: 4.8 (184 reviews)

100+ Reviews 14 Answers

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Features, Video & Details

Super Aggressive Flowmaster Outlaw Sound
Durable 409 Stainless Steel Construction
2.75" Mandrel-Bent Tubing
4" Polished Stainless Steel Tips
Flowmaster Outlaw Mufflers
Fits 2013-2014 GT and Boss Mustangs

Product Resources

Customer Photos (29) Customer Reviews (100+) Questions (21) & Answers (14)

Review & Installation Video

Review & Install Video

Hey I'm Justin with AmericanMuscle.com, and this is my brief look into the Flowmaster Outlaw series axle back, fitting all 2013 Mustang GTs, and GT500's. If you're looking for a system that will really allow your 5.0 or 5.8L to be heard, then this is it, Flowmaster calls this their most aggressive axle back available for the new V8's, thanks to the two Outlaw series straight through mufflers, that should really help uncork the exhaust flow. Like many other Flowmaster exhaust, the Outlaw series is constructed using durable 409 grade stainless steel, and does feature 2.5" mandrel bent tubing. The exhaust is also finished off in that sleek black finish, which is great at resisting corrosion. Finally, everything exits out these dual 4" tips embossed with that iconic Flowmaster logo. Installation on this axle back is very straightforward and should only take you about an hour in the driveway using basic hand tools. Now let's hear how Flowmaster's Outlaw series axle back sounds compared to our factory exhaust.

Super Aggressive Flowmaster Sound. Give your Coyote powered Mustang that unmistakable Flowmaster sound with the Outlaw Series Axle-Back Exhaust System from AmericanMuscle. This system improves exhaust flow using Flowmaster's race-oriented style Outlaw mufflers for that super, aggressive exhaust note your high powered Pony deserves.

Stainless Steel Construction. Constructed from durable 2.75" 16 gauge 409 stainless steel tubing for it's corrosion resistant properties, the Flowmaster Outlaw Axle-back features two race-oriented mufflers with massive 4.0" diameter polished stainless steel tips for impressive muscle car looks and sound. As an added bonus the tips are embossed with the "Flowmaster" logo for true custom styling.

Application. This Flowmaster Outlaw Series Axle-Back Exhaust System is designed to fit the 2013-2014 GT and BOSS Mustangs for both great looks and great sound. Reuses the factory clamps for installation.

Fitment: 2013 2014 Details

MPN# 817592

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

What's in the Box

(2) Muffler assemblies

Installation Info

Installation Time

(approx) 1 Hour

Difficulty Level:

Light to Moderate mechanical skill required.

Installation Guides

Manufacturer:
How to install a Flowmaster Outlaw Series Axle-Back Exhaust on your 2011-2012 Mustang

Customer Submitted:
How to Install an Axleback Exhaust on your 2011-2012 Mustang GT

Tech Specs

Axle-Back Exhaust Specifications

Piping Material:	409 Stainless Steel	Tip Material :	Polished Stainless Steel
Piping Size:	2.75"	Tip Size:	4.0"
Muffler Type:	Straight-through	Fitment:	2013-2014 GT, BOSS

Tech Guides:

Will it fit my Mustang?

Boss 302 - 13
GT - 13, 14

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Customer Photos (29) Submit Your Photo

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Questions & Answers (21)

5 Top Rated Questions

What do I need to be able to put these on my 2014 V6?

Unfortunately, this Flowmaster Outlaw Series Axle-Back Exhaust is specifically designed for use on 13-14 GT model Mustangs and would not fit properly on 13-14 V6 model Mustangs.

Helpful (1)

I have a 2010 v6mustang I know the piping is 2.5 with stock but can I get a bigger pipe as well so it fits the 2.75 cause these sound so amazing and I really want to run them

Yes you are able to fabricate the exhaust to work together if you do not mind doing a little custom work, however as a heads up these will not sound the same on your V6 as they do on a Mustang GT.

Helpful (1)

I currently have Pypes on my 2013 and one of the mounts have broke off the exhaust, so I'm looking for a new one. Does anybody know how the Outlaw stacks up against the Pype-Bomb's? Loudness? 2.5k rpm drone? And performance?

My brother says he had these for his old car (08’ GT) and got a serious drone while at highway speeds, so much that people wouldn’t ride in the car if they knew it was getting on the highway. Are these exhausts any different from the ones that would go on at 08’ GT? Could they potentially not have the same drone at highway speeds?

Exhaust drones are possible with any aftermarket exhaust. Exhaust drone is primarily the result of sound waves traveling through the air and vibration that is transferred through a vehicle's frame, body and components. Different tips, mufflers, and exhaust pipe size can either create or get rid of exhaust drone. There is some drone associated with theFlowmaster Outlaw Axle-Back Exhaust for a 2013-14 GT, but overall due to the different body and design the drone between the 13-14 GTs and an 08 GT would not be the same.

Helpful (0)

How much of a sound difference is there between the flowmaster outlaw axle back and the cat back?

The cat-back will have more of a complete exhaust tone when compared just an axle-back. You will also benefit from the cat-back more as all the pipes up to the cats will be replaced with stainless steel.

Helpful (0)

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

10 More Questions

Will these fit on 2012? 1 answer

Fitment is slightly different on the 13-14 GT models. For the 11-12 GT, you would want this set: https://www.americanmuscle.com/flowmaster-outlaw-axleback-1112gt.html.

Helpful (0)

Are they legal in California 1 answer

The Flowmaster Outlaw Series Axle-Back Exhaust will be CARB approved yes.

Helpful (0)

Do this come with dual tip, so it can go with my GT500 valance ? 1 answer

We do not have a quad tip option for this exhaust. Yes it would fit your valance.

Helpful (0)

Hi. In the customer reviews there are a lot of comments about the droning sound at approx 2000 revs. Do you have any recommendations to prevent / limit this? I am keen to buy this product but cautious about the droning. 1 answer

Hey Frank, As far as the outlaw system goes there is really no way to avoid the droning. this system is supposed to be as loud as loud gets. If you are looking for that same exhaust note but maybe not as loud i would look at the Flow master Pro series (18459). That system has the same design with a little more restriction in the resonator to produce a tone not as loud as the outlaw which is more of a straight through design.

Helpful (0)

I am installing the Flowmaster axle back on my 2013 GT will this increase my horsepower 1 answer

Unfortunately the Flowmaster Outlaw Series Axle-Back Exhaust will not add any additional horse power to the vehicle. This exhaust will allow the car to breathe easier making acceleration easier and throttle response.

Helpful (0)

Will these bolt up to a pypes catback exhaust 3in tubing? I would like to replace my pypes axleback mufflers for something louder and I'm wondering if these will bolt right up or would I need some adjustment to be done? 1 answer

Hello! The Flowmaster Outlaw Series Axle-Back Exhaust will not bolt right up to the Pypes 3 in Tubing. They are designed to mount up with the factory exhaust and will likely require some modification to work with your Pypes Cat Back

Helpful (0)

Why are clamps not included in this kit? 1 answer

The factory axle-back already has a clamp, and these Flowmaster Outlaw Series Axle-Back Exhaust will re-use those clamps since they are the same style clamp.

Helpful (0)

I have a 2012 gt will it still fit because it says (13-14 gt)before i buy? 1 answer

You will need the Flowmaster Outlaw Series Axle-Back Exhaust (11-12 GT, 11-12 GT500), item # 18422, (http://www.americanmuscle.com/flowmaster-outlaw-axleback-1112gt.html) for your 2012 GT.

Helpful (0)

By any chance could this exhaust fit my 2014 v6 mustang? 1 answer

Hi, This axle back will not fit on a V6 Mustang because the GT uses larger connection piping than the stock V6.

Helpful (0)

Does this fit well with my mustang GT/CS 2014? 1 answer

Yes all though it will depend on how loud you want your exhaust to be, fitment should not be a problem, I had the same exhaust on my 2012 Boss Mustang a long with my side exit exhaust that came with the Boss ( no spacers in my side exhaust as well ) and the car was load very load, I also had the MRT H-Pipe with free flowing cats, all I can say is it sounded great but it was load. So if you like it load and free flowing go for it the Flowmaster Outlaw axle backs are great.

Helpful (0)

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Customer Reviews (100+) Write a Review

Overall Rating

4.8

out of 5 stars

Installation Time:Afternoon

Installation Cost:0-$100

Loudness / Volume 4.788889 4.8
Exhaust Note 4.816667 4.8
Fit & Finish 4.75 4.8
Bang For Your Buck 4.719101 4.7

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

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5/5

Installation Time: Afternoon

March 22, 2019

V8 Power

This is loud and everyone knows whenever I have parked in the driveway, if you're looking for an exhaust that isn't breaking the bank but superior quality this is it!

Juned

Year: 2013 Submodel: GT

Helpful (0) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 4
  4
- Bang for your Buck 5
  5
5/5

Installation Time: Shop Install

Installation Cost: $100-$250

March 13, 2019

Outlaw!

Bought these for my 2014 GT and they do not disappoint ! Loud and sound fantastic when you let the horses out of the barn! I love them. A little droning @ 2200rpm but, I can live with it! Happy about my purchase!

William

Year: 2014 Submodel: GT

Helpful (0) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 4
  4
- Bang for your Buck 5
  5
5/5

Installation Time: Less than 1 Hour

March 08, 2019

Awesome

Awesome sound especially during acceleration so worth the price

Chris12harley

Year: 2014 Submodel: GT

Helpful (0) 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

March 07, 2019

EVERYTHING I HOPED FOR!!!

I could not be happier with my purchase! It feels like a new car all over again!! I had Flowmaster 40 series but they left me wanting more. The Outlaws fixed that!!! The sound is nasty mean and the drone isn't near as bad as I expected!! It's loud but not too uncomfortably loud. I had a conversation with the passenger the whole way no problem! This is a steal of a deal for the price! I 1000 would recommend to mustang owners!!

WalterB

Year: 2013 Submodel: GT

Helpful (0) 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: Less than 1 Hour

February 26, 2019

Perfect muscle car sound

I was hoping to wake up the neighbors and the exhaust did just that.

ColeO

Year: 2013 Submodel: GT

Helpful (0) 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: Less than 1 Hour

February 18, 2019

Amazing sound

American Muscle said it was the loudest Flow Master system and it is. Love it.

BrianH

Year: 2014 Submodel: GT

Helpful (1) 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: Less than 1 Hour

February 12, 2019

Couldn't be happier

Easy to install and sounds absolutely brutal. My car finally sounds as mean as it looks.

CodyB

Year: 2014 Submodel: GT

Helpful (1) 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: Less than 1 Hour

February 06, 2019

Flowmaster Outlaws

It was an excellent cat back for my car definitely very loud with my set up.

AdamS

Year: 2014 Submodel: GT

Helpful (1) 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: Less than 1 Hour

January 18, 2019

2014 gt exhaust

Great sounding exhaust. It Isn’t as loud as everyone says. If you want it to be wake the neighbors loud then I would get the cat back with it. That by far is on a whole another level. But the exhaust looks good and sounds great.

AshO

Year: 2014 Submodel: GT

Helpful (2) Thanks for your input!
- Loudness (Volume) 4
  4
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
5/5

Installation Time: Less than 1 Hour

January 18, 2019

Flowmaster Outlaw 5Star

!!!!!!!!!!!Great product for great price!!!!!!!!!!

EdgarT

Year: 2013 Submodel: GT

Helpful (2) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
5/5
December 21, 2018

So loud

Running these with an offroad x pipe and no resonators. It is insanely loud but still a good sound

cattwin

Year: 2014 Submodel: GT

Helpful (3) 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

November 18, 2018

What a purchase!

I just installed them and I have to tell you no video do them justice, they are awesome, the car sounds so powerfull. If you own a mustang GT and don’t have the flowmaster exhausts installed you are missing out! Worth every penny!!

KACO

Year: 2013 Submodel: GT

Helpful (4) 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: Less than 1 Hour

November 06, 2018

My Outlaw Exhaust

Omg The best thing I have invested into , My 2013 GT was stock and I went on YouTube listen to all exhaust , I knew I did Not have a lot of money to put into the Exhaust. But when my son told me to go listen to the Flowmaster Outlaw he new I would Love the Sound. And he was Right. I Love the Sound . It’s unbelievable and sounds like a Beast. Every where I go every Muscle Car guy is just Staring and keep Staring , I LOVE THE SOUND OF MY 2013 GT. ❤️

AngeliaM

Year: 2013 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
October 22, 2018

So Worth It

They Sound Soo Loud , I Love Them I Get Compliments Everywhere I Gooo....... Totally Recomend Them

EdwinD

Year: 2014 Submodel: GT

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

Installation Time: Less than 1 Hour

October 20, 2018

great sound

Love the deep growl. its loud but not disturbingly loud. and the crackle just makes it even more to love!.

1JarvisNorman

Year: 2014 Submodel: GT

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

Installation Time: Less than 1 Hour

August 27, 2018

Great !

The description the magazine describes these pipes are spot on. Fast delivery ! Good quality stuff !

BrianK

Year: 2014 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: Afternoon

August 02, 2018

Awesome sounding!!

These axle back's are awesome. I'm old school, I love me a loud exhaust with tons of drone. The exhaust note is perfect at 2K and above rpm.

Coyote2014

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: Afternoon

July 21, 2018

Great sound

Very agreasive sound. Alot louder than I expected. There is some drone at 3k - 3.5k rpm if your doing 70-80 just drop it in 5th to avoid the drone. Overall I couldn't be happier

NicholasS

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: Less than 1 Hour

July 19, 2018

Great!

I love them. They give off the loudness and tone I was looking for. There is a slight drone around 2000 rpms, but you get used to it.

ShaneBeecham

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: Less than 1 Hour

June 14, 2018

These Outlaws are going to make me an outlaw

My car is sickeningly loud now! I love drone and I get plenty of it. I've installed Flowmasters on each of my last 3 Mustangs and they never disappoint. I'm going to get thrown in jail for noise pollution one day!

JLJenkins

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

Flowmaster Outlaw Axle-Back Exhaust (13-14 GT)

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$465.95

+$9.99

+$399.00

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