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Flowmaster Outlaw Cat-Back Exhaust - Stainless Steel (11-12 GT)

Flowmaster Outlaw Cat-Back Exhaust - Stainless Steel (11-12 GT)
23 Reviews 6 Answers
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  • Item 18430

  • MPN# 817560

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    Features, Video & Details

    • Super Aggressive Flowmaster Outlaw Sound
    • 409 Stainless Steel Construction
    • 3" Mandrel-Bent Tubing
    • 4" Polished Stainless Steel Tips
    • Includes Scavenger X-Pipe and (2) Outlaw Mufflers
    • Fits 2011-2012 GT Mustangs

    Product Resources

    Customer Photos (3) Customer Reviews (23) Questions (13) & Answers (6)

    Review & Installation Video

    Review & Install Video

    Hey I’m Justin with AmericanMuscle.com, and I’m going to be breaking down the Flowmaster stainless steel Outlaw series catback exhaust, fitting all 2011 and 2012 Mustang GTs. This system gets its name from the two race orientated outlaw series straight through mufflers, which are going to be a lot more aggressive than the majority of Flowmaster’s other street offerings, such as the super 44 or delta flow for example. In fact, Flowmaster claims the outlaw series is the most aggressive system available for your coyote Mustang. This exhaust also features 3” mandrel bent tubing throughout and a full 409 grade stainless steel construction. It is worth mentioning that Flowmaster includes what they refer to as their scavenger style crossover pipe, which does take the place of a traditional X or H pipe. Flowmaster claims that this design actually makes a little more torque than those other traditional mid pipes, and it’s something they use in all of their catback designs. Finally everything exits out those 4” polished tips, embossed with that sick Flowmaster logo. Since this is a Cat-Back, you can expect a slightly more involved install that should take you roughly 2 hours from start to finish using basic hand tools. Now let’s hear how the Flowmaster Outlaw series catback sounds compared to our factory exhaust.

    Super Aggressive Flowmaster Sound. Give your coyote powered Mustang that unmistakable Flowmaster sound with the Outlaw Series Cat-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.

    Race Car Growl. The included Scavenger X-Pipe not only helps increase power, but it also adds a loud raspy, race car growl to the sound of your exhaust with its modern "X" crossover pipe design.

    Reuses Stock Cats. The X-Pipe bolts up directly behind the factory catalytic converters with no cutting required saving you time and money. By reusing your stock catalytic converters, you ensure that your Mustang is smog-legal.

    Stainless Steel Construction. Constructed from durable 3" diameter 16 gauge 409 stainless steel tubing for it's corrosion resistant properties, the Flowmaster Outlaw Cat-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 Stainless Steel Cat-Back Exhaust System is designed to fit the 2011 to 2012 GT Mustangs equipped with either aftermarket shorty headers or the factory manifolds.

    Fitment: 2011 2012 Details

    What's in the Box
    • (1) Right muffler assembly
    • (1) Left muffler assembly
    • (1) Scavenger X pipe assembly
    • (1) Right intermediate pipe
    • (1) Left intermediate pipe
    • (4) Band clamps
    • (2) Hanger keepers
    Installation Info
    Tech Specs
    Axle-Back Exhaust Specifications
    Piping Material: 409 Stainless Steel Tip Material : Polished Stainless Steel
    Piping Size: 3" Tip Size: 4.0"
    Muffler Type: Straight-through Fitment: 2011-2012 GT
    Will it fit my Mustang?

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    Customer Photos (3) Submit Your Photo

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    13 Questions / 6 Answers

    Ask a Question

    How would this exhaust compare to the Roush axle-back, I currently have installed on my 2012 tone/loudness wise?

    Hessian5k

    • Hi,This Flowmaster Outlaw Cat-Back Exhaust is louder than the Roush Axle back i suggest taking a look at the video we have on this items page to listen to it.

      Chris J

    Helpful (1)

    would these fit even tho i already have bbk long tubes and o/r x-pipe

    Earl

    • The Flowmaster Outlaw Cat-Back Exhaust is designed to fit with stock manifolds or aftermarket shorty headers.

      AshleyK

    Helpful (0)

    Will I be able to swap out the x pipe for an H pipe, such as item number 69200. Will any cutting or welding be required or would it bolt up as it would with a stock exhaust?

    WilsonJ

    • The Flowmaster Outlaw Cat-Back Exhaust will work with part number 69200 no problem since they are both 3" exhaust.

      Ricky36

    Helpful (0)

    Hi, just from my expierence, there are not a lot of real loud sounding exhaust for the 2010 v6. This exhuast gives off a real mean, loud sound and is there any way, even if it means to spend a couple more bucks, to put this exhuast on a 2010?

    AllisonB

    • Unfortunately there is no way to fit the Flowmaster Outlaw Cat-Back Exhaust on your 2010 V6

      VincentV

    Helpful (0)

    I have this system and it sounds great but the drone at 70 mph is terrible whay would solve this?

    BradenA

    • The only way to solve a drone issue would be to change a component on the exhaust, such as the addition of a resonator or the use of a different muffler.

      AMjordan

    Helpful (0)

    I read if you buy the mufflers by themselves that they're 2.75 inch inlet. This description says 3 omg but is it referring to the mid-pipe being 3 inches in diameter or are they both 3 inches in diameter?

    Eric

    • Hello! The Flowmaster Outlaw Cat-Back Exhaust has a 3 inch diameter from the mid pipe to the exhaust tips which are 4 inches in diameter.

      VincentV

    Helpful (0)

    Customer Reviews (23) Write a Review

    Overall Rating 4.8

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$100-$250

    • Loudness / Volume 5 5
    • Exhaust Note 4.863636 4.9
    • Fit & Finish 4.545455 4.5
    • Bang For Your Buck 4.727273 4.7



    • 5/5

      May 24, 2018

      Beast Mode!

      Very, very happy with this setup! This exhaust brings out the inner beast in your stang. Definitely a head turner when your rippin down the street... I've gotten tons of positive feedback from my friends and randoms that give you the thumbs up when you drive by! Would definitely recommend this to the next buyer, I also passed emissions with flying colors :)

      DanteE

      Year: 2011 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      October 19, 2017

      Why aren't you getting this already!!!

      To put it in simple words, this was my best purchase I have ever done so happy with the final outcome of my car sounds mean and aggressive how mustangs should sound like

      Rigoberto

      Year: 2012 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      September 01, 2017

      Great sound!

      Definitely turns heads! Deep and wonderful sound. Looks good installed as well.

      ScottM

      Year: 2012 Submodel: GT

      Helpful (1)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      June 26, 2017

      Toooooooooooooooo loud but lovely

      Maaaaaaaaaaan these are loud. The exact reason you love the Mustang makes you believe that you can challenge any vehicle that approaches. Wooooow just awesome. It channels that inner child OMG CAN'T RESIST WIDE OPEN THROTTLE. sounds like God telling you to keep going

      RickFavor

      Year: 2011 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      June 23, 2017

      Great product

      Exactly what I was looking for great sound videos don't do it justice

      MarlonT

      Year: 2012 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      February 27, 2017

      LOUD

      I wanted the loudest exhaust I could find with an aggressive note and I found what I believe to be the best choice for a mustang driver who wants his car to sound like Godzilla and King Kong had a baby and hopped him up on roids. Great buy, 25/10

      AdamF

      Year: 2012 Submodel: GT

      Helpful (2)

    • 5/5

      December 05, 2016

      Great

      Very loud! Gives you the desired rumble that mustangs should come with

      Speed

      Year: 2012 Submodel: GT

      Helpful (3)

    • 5/5

      October 07, 2016

      Legit!!!

      I had ProDyno in SC install the outlaw kit and it only took about an hour. No issues with install due to fitment and that these guys are legit pro's. You won't regret buying this kit! I had the outlaw mufflers on my 08 GT/CS and it sounded awesome so I had to get the x-pipe and muffler kit for my 2011 GT. It's a real quality kind of loud past 2000 rpm's. It's a semi-mild growl at idle unless it's a cold start lol. There is a noticeable difference in power but nothing spectacular(without a tune). I've done all kinds of research and THIS IS THE KIT TO GET!!

      Eric

      Year: 2011 Submodel: GT

      Helpful (3)

    • 5/5

      September 12, 2016

      Better than expected

      Love the new sound. Cold starts sound amazing, cabin drone around 2000rpm but while cruising it's a low growl. Very happy.

      cdub360

      Year: 2011 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      February 17, 2016

      Best purchase I have made so far!

      I had researched multiple catback systems. I was looking for an aggressive system that wasn't full of drone or popping and cracking. I could not have made a Better decision going with the outlaw. I had a local shop install took about 2 hrs and was done for 80$ plus tax. Thank you American Muscle as their customer service is second to none. and their products come in perfect condition within a couple of days in the east coast.

      Coyote50

      Year: 2011 Submodel: GT Huber heights ohio

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      September 11, 2014

      Unbelievable sound!

      This by far has got to be THE best exhaust I've ever heard! Will definitely turn plenty of heads. I had mine installed at a shop and even they were impressed with the sound. There is a very very minor drone at about 2100-2200 rpm but I personally love it! Worth every penny! Highly recommended if you want your 'stang to sound like nothing else out there.

      ChrisGTCS

      Year: 2011 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      August 27, 2014

      Louder then i thought

      Took some time getting the stock exhaust off and needed plenty of room to put the new one on, sounds really good almost like not having a exhaust at all

      Cruiserlevi2005

      Year: 2011 Submodel: GT Perryville, MO 63775, USA

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      February 23, 2014

      Amazing sound!!

      This exhaust makes the mustang sound mean and aggressive! It's what every mustang should sound like! Definitely worth every penny!

      Keith13

      Year: 2012 Submodel: GT San Antonio TX

      Helpful (3)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      November 19, 2013

      Looks awesome, sounds loud, and worth the $

      Went from GT500 axlebacks to this system and its much louder at startup and thru all rpm ranges. There's drone around 2k rpm as most other people noted. If you want a system without drone then this isn't for you. It's a very solid product and worth the money for what you get.

      jaxmustang2013

      Year: 2012 Submodel: GT Jacksonville, FL, USA

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      November 07, 2013

      Installed on my 2012 Mustang GT

      Just as your site stated, the fit and finish are superb. I was blown away by the quality of the pipes. The installation went off with out a hitch, everything is beyond reproach . A excellent and quality product. I love my Outlaw Cat back Exhaust!

      Brian1987

      Year: 2012 Submodel: GT Pasco,WA

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      August 26, 2013

      Stupid LOUD!!

      These exhaust are really loud. I get asked all the time if i have straight pipes and they're surprised when i tell them i still have stock headers and cats. If you're looking for loud and raspy this is the exhaust to get. As for installation you will most likely need a lift to get the stock over axle pipes off and the new ones on.

      WillyWonka08

      Year: 2011 Submodel: GT MD

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      August 26, 2013

      BEST EXHAUST HANDS DOWN!

      When i bought my 11' GT first stop was exhaust! I was first going to mismatch mufflers and x-pipes but decided to just take the guess work out and buy the complete Flowmaster catback. Fitment was no issue (car lift highly recommended). Took me and my friend about an hour or so. Muffler tips were centered with bumper cutouts & everything tightened down perfectly. Now lets get to the best part... THE SOUND. This exhaust is the perfect tone anyone would ever need. This is the loudest and most aggressive tone while still keeping your cats in place. I can have the monsterously loud sound while still keeping my cats in place. No check engine lights, no worries! This is one of the most affordable catbacks on the market right now. For anyone thinking of buying it... DO IT! You will love it!!

      Kpurdz

      Year: 2011 Submodel: GT West Chester, NY

      Helpful (3)

    • 4/5

      Installation Time: Afternoon

      July 24, 2013

      Amazing sound!!

      Was going to get a Borla exhaust until I heard the flowmaster on a youtube video and then saw How much cheaper it was. Exhaust came in about a week after ordering with no issues thanks to American muscle. Stock exhaust was a pain to remove but eventually managed it. After that it was relatively smooth sailing fitting the flowmaster on. First start up with the flowmaster in blew my mind. It was making the whole shop my car was in shake it was so loud. The video in the Internet doesn't even do this exhaust justice. I definitely recommend this product.

      Evolution

      Year: 2012 Submodel: GT Edmonton, AB, Canada

      Helpful (6)

    • 5/5

      Installation Time: Less than 1 Hour

      July 01, 2013

      Totally different car now'

      Shipping wast fast! Day I got it bad boy went on lift and was installed " get a friend because it just makes the installation a breeze" sounds is amazing all the guys at work love it buddy of mine has the outlaw mufflers not the cat back big difference absolutely amazed with product

      MikeGT124

      Year: 2011 Submodel: GT Corpus Christi, TX, USA

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      March 23, 2013

      Outlaw Catback System

      This is definitely an aggressive sounding system. Bought this system for my brother's 2011 GT and it has improved the exhaust sound tremendously. If you're looking for a better sounding Mustang without deleting the cats, then this is the system to have.

      J35Lew

      Year: 2011 Submodel: GT

      Helpful (4)

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