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

Market Price $509.99 You Save 13% ($67.02)
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$442.97

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  • Item 18423
  • MPN# 817511

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    Features, Videos & 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

    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

    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?
    • Bullitt - 08, 09
    • GT - 05, 06, 07, 08, 09, 10
    • GT500 - 07, 08, 09, 10

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    39 Questions / 13 Answers

    Ask a Question

    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

    echellon

    • 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

      Cableguy500

    Show 3 more answers Helpful (9)

    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

    UncleJ

    • 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!!!!

      luftwaffer

    Show 2 more answers Helpful (5)

    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

    PATRICK95GT

    • 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.

      AshleyK

    Helpful (1)

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

    2Mac

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

      RonN

    Show 2 more answers Helpful (1)

    will these outlaw exhaust pipes pass smog

    steveh

    • We suggest checking with your local authorities to see if the Flowmaster Outlaw Series Axle-Back Exhaust is legal in your area.

      AshleyK

    Helpful (0)

    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?

    EthanT

    • The Flowmaster Outlaw Series Axle-Back Exhaust are specifically designed for the 05-10 GT and 07-10 GT500s.

      AshleyK

    Helpful (0)

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    Customer Reviews (100+) Write a Review

    Overall Rating 4.9

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:0-$100

    • Loudness / Volume 4.810458 4.8
    • Exhaust Note 4.869281 4.9
    • Fit & Finish 4.588235 4.6
    • Bang For Your Buck 4.763935 4.8



    • 5/5

      Installation Time: Less than 1 Hour

      February 19, 2018

      Overall Great Purchase!

      Decided to go with these as they had great reviews. The sound when driving is perfect, although they weren't as loud as I was hoping. I had a shop install them and I have scraping on my bumper on the passenger side muffler. Can't tell for sure if it's the shop's fault or not but that is why I gave it a 4/5 for Fit and Finish. Cold starts are also very loud. :)

      TrevorR

      Year: 2008 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      February 16, 2018

      Just buy them!

      Absolutely love the outlaws. I Was nervous with how it would sound at first but now that they are installed its the perfect mustang sound.

      GordonJ

      Year: 2006 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      February 15, 2018

      Sounds Excellent

      Installed on my 2006 Mustang GT and I am very satisfied. I wanted a deep throaty sound. The tone is excellent. I can't stop driving it....i look for reasons to take off down the road lol....Gonna be a fun Summer. Now for the CAI install.

      MartinT

      Year: 2006 Submodel: GT

      Helpful (0)

    • 5/5

      February 14, 2018

      Loud

      I like the sound it took under an hour to install good parts i would say others should take a good look at these......,,,

      JohnO

      Year: 2005 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      February 08, 2018

      Great Sound and Easy Install

      Installed these along with Stainless Works 3" H-Pipe and High Flow cats. These sound amazing. Nice old school sound. East to install.

      Overkill

      Year: 2010 Submodel: GT500

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      January 29, 2018

      Excellent - just right

      Not too loud, just the right rumble and power. Reading the other install tips on these posts helped a lot. It was a fun project.

      ScottM

      Year: 2008 Submodel: GT

      Helpful (0)

    • 5/5

      January 29, 2018

      Awesome

      This exhaust is super aggressive if you want your neighbors to know your home this is the exhaust for your!

      DanielB

      Year: 2009 Submodel: GT

      Helpful (0)

    • 5/5

      January 26, 2018

      Outlaw mufflers

      I had 3 other mufflers on my 09 GT 500 and the outlaw axle backs with the exhaust tips sound the best

      AndyI

      Year: 2009 Submodel: GT500

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      January 26, 2018

      Sweet

      Badass exhaust gives your car a loud deep muscle car tone

      BooneG

      Year: 2008 Submodel: Bullitt

      Helpful (0)

    • 4/5

      Installation Time: Afternoon

      January 24, 2018

      Deep rumble

      Has a deep rumble and sounds real good, really enjoy just had a little trouble with install, but that’s because did it on my own with not so many tools

      Noah

      Year: 2006 Submodel: GT

      Helpful (0)

    • 3/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      January 04, 2018

      Great sound except for drone

      It has a nice deep rumble on start up that'll turn heads and it's pretty loud without being too over the top. Cabin noise is a fair amount louder though and it drones pretty bad around 1800-2200 rpm. Looks great also except one of the exhaust tips came welded on crooked.

      ReedA

      Year: 2005 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      January 02, 2018

      Very Good Quality and Sound!

      I recently put these Flowmasters on with an off-road BBK x pipe and they sound amazing! I would recommend these to anyone!

      BrockB

      Year: 2005 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      December 27, 2017

      Great Sound

      Easy to install, and sounds amazing! Totally worth the money spent!

      AubreyH

      Year: 2005 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      December 07, 2017

      Flowmaster Outlaw

      Every minute, every hour, every day and every week that I spent looking at videos, listening at sound clips, and reading other costumers opinions has been well worth it. This axle-back should be a #1 seller. I have tried other mufflers and they just don't have what I was looking for. If you are looking for that true muscle car rumble look no longer. Flowmaster Outlaw is what you are looking for. When you put the petal down and go through the gear box you will fall in love with that aggressive rumble. I'm warning you the sound is additive. You will keep going through the gear box over and over again. I was worried that it would be too loud and I didn't want to spent over 400 dollars on something I didn't like. The sound is perfect for me and I am 53yrs old. But if you have neighbors close by they will know when you leave everyday. It has some drone to it but not bad. If you are looking for that aggressive muscle car rumble don't waste your money on cheaper systems. Get what your ears desire (Flowmaster Outlaw)

      swsanford

      Year: 2006 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      December 03, 2017

      i love it

      that exhaust i was looking for it is loud but in a nice way i loved it so mush and it is good for the money too

      JonathanS

      Year: 2009 Submodel: GT

      Helpful (0)

    • 5/5

      December 02, 2017

      Incredible Sound

      Exactly what i needed to bring out the sound and goes well with the ford racing cams installed as well

      BrianM

      Year: 2005 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      December 02, 2017

      Great exhaust

      This exhaust sounds amazing and very easy to put on.

      Kara

      Year: 2007 Submodel: GT

      Helpful (0)

    • 5/5

      December 02, 2017

      Awesomeness!!!!

      The title says it all. The perfect sound, the way a mustang should sound like. Some drone but not bad at all. Very acceptable. Install was not too bad. Had to relocate the mounts higher, but all in all went well. The best part was when I was at a traffic light and a cop pulled up next to me and said hey buddy sounds awesome. That made my day. I say don't think about getting them, just get them.

      AnthonyS

      Year: 2005 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      November 24, 2017

      Great GT Sound

      It took no time to install, and love the look and loudness. I get many head turners now when I drive my Mustang.

      MichaelB

      Year: 2005 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      November 23, 2017

      Great sound

      Awesome muscle car sound. Sounds great with off-road x pipe.

      GabrielG

      Year: 2008 Submodel: GT

      Helpful (0)

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