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Flowmaster Outlaw Axle-Back Exhaust (05-10 GT, GT500)

Market Price $516.99 You Save 12% ($61.04)
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$455.95

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  • Item 18423
  • MPN# 817511

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    Features, Video & Details

    • Super Aggressive Flowmaster Outlaw Sound
    • Durable 409 Stainless Steel Construction
    • 2.5" Mandrel-Bent Tubing
    • 4" Polished Stainless Steel Tips
    • Includes Two Flowmaster Outlaw Mufflers
    • Fits 2005-2010 GT, Bullitt, and Shelby GT500

    Review & Installation Video

    Review & Install Video

    Hey everyone I’m Justin with AmericanMuscle.com, and today we’re going to be breaking down the Outlaw series Axle-back from Flowmaster for the 2005-2010 Mustang GT. Flowmaster calls this their most aggressive Axle-back system available for the late model 46 Mustangs. This entire kit centers around these two outlaw series mufflers, which to the casual observer, hardly resemble mufflers at all, but rather highly engineered resonant tubes, which are responsible for that super aggressive tone. Like many other Flowmaster kits the Outlaw series features 409 grade steel construction and 2.5” mandrel bent tubing. It also features this very sleek black finish, which is going to be great at resisting corrosion. Everything exits out of these dual 4” polished tips, embossed with that classic Flowmaster logo. Installation of this Axle-back is very straight forward and should only take you about an hour using some basic hand tools. Now let’s hear how the Outlaw series from Flowmaster sounds compared to your factory exhaust.

    Super Aggressive Flowmaster Sound. Give your 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.

    Quality Construction. Constructed from durable 2.5" 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 2005 to 2010 GT, Bullitt and the 2007-2010 Shelby GT500 Mustangs for both great looks and great sound.

    Technical Note: Americanmuscle recommends adding the 2005+ Mustang 304 Stainless Steel Exhaust Hanger Kit from the drop down option above, to provide more strength, stability and a cleaner installed appearance. If you have a 2007 Mustang you may need the kit for correct installation.

    Fitment: 2005 2006 2007 2008 2009 2010 Details

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

    What's in the Box
    • (2) Muffler assemblies
    • (2) Clamps
    Installation Info
    Tech Specs
    Axle-Back Exhaust Specifications
    Piping Material: 409 Stainless Steel Tip Material : Polished Stainless Steel
    Piping Size: 2.5" Tip Size: 4.0"
    Muffler Type: Straight-through Fitment: 2005-2010 GT, Bullitt and Shelby GT500
    Will it fit my Mustang?

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    Questions & Answers (55)

    5 Top Rated Questions

    SLPLOUNDMOUTH OR FLOWMASTER OUTLAWS DID HE HAVE A BIG DIFFERENCE BETTEWN THE SLP LOUNDMOUTH AND THE OUTLAW. THE FLOWMASTER OUTLAW IS IT REALLY LESS LOUND THAN SLP LOUNDMOUTH I HAVE A GT 2005, AND I REALLY DONT KNOW WITCH ONE BUY. WHICH ONE IS GONNA BE THE BEST FOR SOUND AND PERFORMANCE. WITCH PART I COULD JOIN TO THE OUTLAW FOR INCREASE SOUND AND PERFORMANCE THANKS

    • Outlaw is plenty loud all by itself. If you want to amp it up try some long tube headers paired with an h pipe. But trust me they're good all by themselves

    Helpful (9) Show 3 more answers

    How do these sound on a V6 with true dual? Do you have a sound clip available?? I removed the X brand because of cabin drone... will these create a drone on the V6? Thanks

    • I have sound clips of a 2009 V6 with the ford racing dual exhaust that uses a true dual setup and the same mufflers as the bullett mustang, and the Flowmaster Outlaw. The Outlaw provides a much deeper throat tone to the exhaust making it more like a V8 sound. It has a little bit of drone at certain RPM's however it really gives the V6 a muscle car sound. The closest thing I can relate it to is the new Boss 302 Laguna Seca. IT SOUNDS AWESOME!!!!

    Helpful (5) Show 2 more answers

    Borla s type or flowmaster outlaw, which one have deeper sound?

    • The flowmaster outlaw will have a more aggressive and deeper exhaust tone.

    Helpful (1)

    I have a 2005 Shelby GT500...will these work?

    • This Flowmaster Outlaw Series Axle-Back Exhaust will not fit a 2005 Mustang GT500.

    Helpful (1)

    I have the Pypes muffler deletes on my 05. Are these Flowmaster Outlaw axle back louder and have a deeper sound than the Pypes muffler delete's? Cant really hear the difference between the video's

    • The Pypes Muffler-Delete Axle-Back Exhaust (05-10 GT, GT500), item # 20022, (http://www.americanmuscle.com/pypes-2005-gt-muffler-delete-axel-back.html) may have a slightly higher pitched sound than the Flowmaster Outlaw Series Axle-Back Exhaust, The Flowmaster's are going to have a very deep sound that is also loud. It also depends on what other exhaust mods you have made. Different headers and mid pipe will drastically change the sound of the car as well.

    Helpful (1)
    Post Your Question
    10 More Questions
    Do the Flowmaster Outlaw series Axle-Back Exhaust add horse power to your Mustang. 3 answers
    I’m looking to upgrade to long tube headers on my cammed 2009 gt. I was suggested to add a muffler for back pressure since I’m currently catless and muffler less. Will these give me the back pressure needed for the performance and maintaining the loudness I love so much?! 0 answer
    I have a question about this flowmaster outlaw ? Is it louder than a MBRP axle back which one is louder ?? 1 answer
    how do these compare to the corsa extreme axlebacks?? 1 answer
    From what I've read about the outlaws they have a mean rumble, do they have any crackle to them? 1 answer
    What’s the best mid pipe for these exhaust for a louder sound 1 answer
    What’s the best mid pipe for these exhaust for the loudest sound 1 answer
    Would these be better with off road x pipe or off road h pipe? 1 answer
    Which are louder Slp loudmouth, pypes bomb or these?? 1 answer
    Currently I have Magnaflows mufflers on my 08 GT500 and it's tuned to have those but will I need to retune if I install these Flowmaster Outlaws or is a tune necessary? 1 answer

    People Who Bought This Item Also Bought

    Customer Reviews (100+) Write a Review

    Overall Rating 4.9

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:0-$100

    • Loudness / Volume 4.818444 4.8
    • Exhaust Note 4.873199 4.9
    • Fit & Finish 4.616714 4.6
    • Bang For Your Buck 4.751445 4.8



    • 5/5

      Installation Time: Less than 1 Hour

      January 17, 2019

      Looks and Sounds Amazing!

      Took literally 30 min to install. Luckily my neighbor use to be a mechanic. Straight forward easy install. Watch the video! The sound is like a roaring lion. It is loud and resonates at certain rpm. But that’s really how a Mustang should sound. Definitely would recommend.

      WMee

      Year: 2005 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      December 26, 2018

      Great sound

      Sounded great and was easy to install looks good would tell anybody wants aggressive sound to get

      Duane

      Year: 2007 Submodel: GT500

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      December 24, 2018

      UPGRADE - Order these....NOW!

      Originally had Pypes Violators and they just didn't cut it for me (had Outlaws on a 2014 I had so I knew the deal). The Pypes were on when I bought the car and I was finally able to order these. They have an amazing sound, fit perfectly, and installed quickly with provided hardware. Might have to pull straight in garage now - wife says they're LOUD and might wake the baby when I leave for work (lol, oops)!

      David

      Year: 2008 Submodel: GT

      Helpful (1)

    • 5/5

      December 22, 2018

      Bad Pipes

      WOW!!!!! Easy bolt up and paired with BBK Shorty Headers the sound is just amazing!!!! Look great tips and bad black bodies

      JohnT

      Year: 2010 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      December 20, 2018

      Sounds like death lol

      Loud....very loud. I don't even have long tube headers yet and it's still a very significant difference versus stock exhaust . You will wake neighbors

      Teecee

      Year: 2010 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      December 10, 2018

      Axle exhaust

      Great sound, exactly what I was looking for to give my mustang a deeper old school sound.

      GabbrielleC

      Year: 2007 Submodel: GT

      Helpful (1)

    • 5/5

      December 09, 2018

      Great

      Most have for events and shows Very Loud But not so cool at times .

      ArnoldA

      Year: 2006 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      December 04, 2018

      Flowmaster outlaw exhaust

      Great sound!!!!!!! Loud but not crazy loud. Would buy again

      KeithB

      Year: 2008 Submodel: GT500

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      December 02, 2018

      Flowmaster

      The fit was perfect and the install was pretty easy! I couldn't be happier with sound!! American Muscle always provides the best products and service!!! Thank you guys!!!

      John

      Year: 2010 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      November 21, 2018

      These are so aggressive.

      I love these exhaust. They are very loud, but not raspy in the slightest. Not hollow like a chambered flow master. deep exhaust note with good sound throughout the whole rpm range.

      ZacheryM

      Year: 2007 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      November 20, 2018

      Mustang gt

      They prove to stand up to the flowmaster product. Great sound , it will turn heads.

      Oscar

      Year: 2008 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      November 20, 2018

      Outlaw flow master

      Sounds really great and easy install on my 2006 Gt much better than the flow master I bought from a regular muffler shop

      MichaelD

      Year: 2006 Submodel: GT

      Helpful (2)

    • 5/5

      October 23, 2018

      Way Better Sound

      Flowmaster Outlaws sound so much better than the stock exhaust. AM did a great job getting these to me quick, instructions that came with the exhaust were good. product packaged well..just need some long tube headers to really set them off now.

      05Stanger

      Year: 2005 Submodel: GT

      Helpful (3)

    • 4/5

      Installation Time: Afternoon

      October 01, 2018

      Very Loud, Very Raspy

      Paired with pypes off-road x pipes. Awesome volume, turns a lot of heads, may switch to off-road H though to add a deeper tone

      KyleR

      Year: 2008 Submodel: GT

      Helpful (3)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      September 27, 2018

      Best sound for the $ .....

      -The sound is absolutely awesome paired with long tube headers / X pipe / Ford racing manifold and JLT cold air intake it screams ... idle rumble and chop are on point with the ford racing hot rod cams... - Removed the Pypes Violators I had on the vehicle made it sound like a European V8 was not happy. - The only downfall ... the fitment is absolutely Atrocious ! the tips were off center and nothing lined up .. took it to a local shop they cut the hangers rewelded accordingly everything looks great and yes still worth it !

      JasonS

      Year: 2007 Submodel: GT

      Helpful (5)

    • 5/5

      Installation Time: Less than 1 Hour

      September 20, 2018

      Very Happy

      Ordered these on a Saturday night and they were at my door the following Tuesday. Took less than an hour to install with basic hand tools, i.e. 13mm wrench, 15mm wrench, 13mm deep socket, 15mm deep socket, and a ratchet. I am VERY pleased with the volume and tone of the exhaust now. I will be adding long tubes and a off-road X-pipe soon (sooner if I win this exhaust sweepstakes). I'll be ordering them from AM as well. Thanks AM!

      SVTParatrooper

      Year: 2008 Submodel: GT500

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      September 10, 2018

      Nice mufflers

      These mufflers are awesome. They sound perfect and are super easy to install. When they showed up they were pretty scratched up, I’m sure that has to do with the shipping company and not American Muscle, I am also positive that if I asked then they would have replaced them with new ones. I put them on anyways because I don’t really care if they’re scratched underneath my car. 10 bolts and they slide right on. Make sure you jack your car up plenty high, and the factory exhaust hangers will work with these too

      ChaseB

      Year: 2006 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      August 22, 2018

      Flowmaster Outlaw Axle-Back Exhaust, GT500)

      I installed these on my 2008 GT500. I also have these on my 2011 GT. Love the sound, deep throat not the raspy tone

      Gus

      Year: 2008 Submodel: GT500

      Helpful (5)

    • 5/5

      Installation Time: Less than 1 Hour

      July 09, 2018

      LOUD

      install is very straight forward, unbolt old mufflers, bolt on new ones. Exhuast is very loud and has a nice throaty tone. I replaced my Flowmaster American Thunder mufflers with these and the sound is similar, but these are much louder.

      BigRob06

      Year: 2006 Submodel: GT

      Helpful (4)

    • 5/5

      July 09, 2018

      Axel back

      I was looking for the sound my mustang deserves, this was perfect. Neighbors will hate me but who cares.

      Kelly

      Year: 2006 Submodel: GT

      Helpful (5)

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