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

Flowmaster Outlaw Axle-Back Exhaust (05-10 GT, GT500)
100+ Reviews 21 Answers
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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    Flowmaster Outlaw Axle-Back Exhaust (05-10 GT, GT500)

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

        Product Resources

        Customer Photos (82) Customer Reviews (100+) Questions (55) & Answers (21)

        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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        Customer Photos (82) Submit Your Photo

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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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