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

Flowmaster Outlaw Axle-Back Exhaust (05-10 GT, GT500)
100+ Reviews 22 Answers
Market Price $516.99 You Save 12% ($59.51)
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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 (78) Customer Reviews (100+) Questions (46) & Answers (22)

        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: California's Proposition 65

        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 (78) Submit Your Photo

        View All 78 Photos

        Questions & Answers (46)

        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

        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)

        Do the Flowmaster Outlaw series Axle-Back Exhaust add horse power to your Mustang.

        • That is a big yes and they sound real good and meaty.

        Helpful (1) Show 2 more answers
        Post Your Question
        10 More Questions
        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
        Will these work on a 2010 v6 mustang with a Pypes true dual exhaust system? 1 answer
        Do i need to re tune my car after adding these? 2010 Mustang GT. 4.6L V8. 1 answer
        Would this Axle-Back pass New Jersey state inspection? No other modifications are done to the exhaust yet. 1 answer
        Will these get me pulled over for being too loud? 1 answer
        Will the Flowmaster Outlaw Exhaust pass Pennsylvania state inspection? 1 answer
        will these outlaw exhaust pipes pass smog 1 answer
        I'm interested in purchasing this Exhaust set with an X pipe. I currently have a 2011 v6 with a stock dual exhaust, by chance would these fit? 1 answer
        I have Duel exhaust on my 2008 V6 mustang, can I put GT axle-back exhaust on it ? 1 answer
        Hey does these exhaust come with black tip? 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 4.810241 4.8
        • Exhaust Note 4.873494 4.9
        • Fit & Finish 4.608434 4.6
        • Bang For Your Buck 4.752266 4.8



        • 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 (0)

        • 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 (0)

        • 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 (2)

        • 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 (0)

        • 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 (1)

        • 5/5

          Installation Time: Shop Install

          Installation Cost: $100-$250

          June 25, 2018

          obnoxious

          love them such a great sound. now with 3 loud cars to irritate my neighbor especially first thing in the morning in the garage. would highly recommend these to any mustang owner

          SteveH

          Year: 2006 Submodel: GT

          Helpful (0)

        • 5/5

          Installation Time: Less than 1 Hour

          June 22, 2018

          Great exhaust

          Great sounding exhaust. Great sound with minimal drone. Install was easy and straight forward. Love the sound.

          TylerM

          Year: 2010 Submodel: GT

          Helpful (4)

        • 5/5

          Installation Time: Less than 1 Hour

          May 28, 2018

          Head Turner

          The video does not do it justice. It sounds so much better in person. It has a really nice deep rumble and it’s very loud and cold start is even louder. Turns heads wherever you go definitely worth it.

          Jenni

          Year: 2006 Submodel: GT

          Helpful (4)

        • 5/5

          Installation Time: Afternoon

          May 27, 2018

          V6 stang

          Had the V6 Pypes dual conversion on before. This was an easy fit and works great. The sound is a deeper and sound a little louder. Took about 3 hrs due to having a hidden hitch and had to remove pipe near transmission first. But without the hitch it would have taken about 2 hours.

          Tomw2005

          Year: 2005 Submodel: V6

          Helpful (3)

        • 5/5

          Installation Time: Less than 1 Hour

          May 24, 2018

          loud

          Very happy with this exhaust would tell all on how great this product is

          jd

          Year: 2005 Submodel: GT

          Helpful (2)

        • 5/5

          Installation Time: Less than 1 Hour

          May 24, 2018

          Best sound!!!!

          It's roars on 1st-4th gears then when it hits 5th it growls all the way

          NathanielL

          Year: 2005 Submodel: GT

          Helpful (2)

        • 5/5

          Installation Time: Afternoon

          May 11, 2018

          What a difference over factory’s stock mufflers

          This exhaust are definitely a head changer and are easy to install just a few awkward spots getting the hangers down but it was worth the hassled and them Polish give this aggressive exhaust a nice finish definitely would consider every mustang person to take a look at these!

          AdamR

          Year: 2007 Submodel: GT

          Helpful (2)

        • 5/5

          Installation Time: Less than 1 Hour

          May 03, 2018

          Fantastic Flowmasters

          I enjoy driving my GT500, but the factory exhaust really left me feeling like something was missing. After researching so many different manufacturers and parts options, I decided to buy the Flowmaster Outlaw Series Axle-Back exhaust. After all, it has great reviews, a superb reputation of quality, and the price was just right. A couple of days later, the mufflers arrived and with the excitement of a kid at Christmas, I tore open the box. I was not disappointed to say the least. The workmanship and quality put into this exhaust is evident in the materials used, expert welding, and even the black finish with shiny tips featuring the Flowmaster logo. It took me about an hour to pop off my factory exhaust, and install the Flowmaster Outlaws. The prewelded brackets fit easily and securely into my factory hangers... I was lucky enough to have an '07 with the right hangers, and not need to purchase new ones. So I tightened everything up, and fired up the engine. Let me say this.... even with factory cats, it was amazing. It was that perfect spot between not loud enough and too loud. The Flowmaster Outlaws are perfect for an aggressive but not overwhelming sound that every muscle car enthusiast loves to hear. Everything about this axle-back exhaust was great, from start to finish, and I am absolutely in love with it still after almost a month. 10/10 recommend if you want a head-turning, aggressive growl for your hot rod, the Flowmaster Outlaws are what you need.

          DannyB

          Year: 2007 Submodel: GT500

          Helpful (3)

        • 3/5

          Installation Time: Less than 1 Hour

          April 29, 2018

          Outlaws

          At 3,000rpm and above with longtube headers and a catless x-pipe you will shatter eardrums!!!! The fit isnt very good..does not fit into stock hangers on the car. But if you are looking for wide open design and quality these are for you

          08InfantryGT

          Year: 2008 Submodel: GT

          Helpful (2)

        • 5/5

          Installation Time: Less than 1 Hour

          April 25, 2018

          Best prouduct alive.

          Best exhaust pipes out right now. Turned my gt into a beast.

          ShawnL

          Year: 2006 Submodel: GT

          Helpful (3)

        • 5/5

          Installation Time: Shop Install

          Installation Cost: $250-$500

          April 20, 2018

          Omg love these!!

          Sound is amazing! Pretty loud for a v6! Nice and deep when combined with CAT delete and an X-Pipe or H-Pipe.

          Jordan

          Year: 2005 Submodel: V6

          Helpful (2)

        • 5/5

          April 14, 2018

          Lound and tunder

          Great exaust they sound so good really happy with theis product

          RomanF

          Year: 2010 Submodel: GT

          Helpful (5)

        • 5/5

          Installation Time: Less than 1 Hour

          April 11, 2018

          Freaking awesome !!

          Brought the car to life. Awesome deep throaty sound. Sounds amazing

          MichaelM

          Year: 2010 Submodel: GT

          Helpful (4)

        • 5/5

          Installation Time: Shop Install

          Installation Cost: $250-$500

          April 09, 2018

          Stormtrooper V6

          I got a 2007 mustang v6, with this product it sounds better then what most would think it would. The guys at the shop was amazed when they first started it up. The outlaws are a way to go with a v6 or a V8. My system is loider then my buddy's 2007 mustang GT with the borla ataks.

          DylanE

          Year: 2007 Submodel: V6

          Helpful (2)

        • 5/5

          Installation Time: Less than 1 Hour

          April 03, 2018

          Great Exhaust

          One of the best Exhaust I have had for that price is the best

          MathewK

          Year: 2006 Submodel: GT

          Helpful (2)

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