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Roush Extreme Axle-Back Exhaust (05-10 GT, GT500)

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    Features, Video & Details

    • Tough, Aggressive Growl
    • Straight-Through High-Flow Resonators
    • 2.5" 409 Aluminized Stainless Steel Tubing
    • 4" 304 Stainless Steel Tips
    • Flash Chromed Dual Wall Tips w/ Roush Logo
    • Fits 2005 to 2010 GT and GT500 Mustangs

    Review & Installation Video

    Review & Install Video

    Hey, what's up everybody? I'm Justin with AmericanMuscle.com, and this is my detailed review of the Magnaflow MF Series Cat-Back Exhaust System, featuring the dual same side exit configuration, which dumps before the passenger rear tire. Available for all 2015 and up, 2.7 liter Ecoboost Powered Supercrew & Supercab F150s. All right, guys, in this video we're going to cover three big topics. We're going to talk sound you can expect here with the Magnaflow MF Series. We're gonna talk about the materials used in this system. And then finally we're gonna do a quick, little walk through of the install itself. And honestly for most of you guys out there, it's going to be one out of three wrenches on the difficulty meter. Nothing too crazy here. So we'll have a little bit more detail coming up on that later on. The Magnaflow MF Series Cat-Back here is going to be a great choice for newer Ecoboost owners out there who are after a really well made system from a quality brand like Magnaflow. You want just a little bit more noise, both inside and outside of the truck. And finally, and maybe more importantly, you want the very cool dual same side exit configuration that will dump before the passenger side rear tire. So again, guys, this is just going to be for someone who wants a little bit more sound, and maybe isn't concerned with being the absolute loudest truck on the block. So with all that said, let's take a close look at this cat-back. Magnaflow is definitely one of those companies that's known for making some pretty solid stuff over all, using 100% stainless steel for the most part. All of which is gonna fit great, and produce some pretty well rounded tone. Now the MF series that I have here certainly checks all of those boxes. And I think you'll find that this is just one of many different offerings for your Ecoboost powered truck here on the site for Magnaflow. This particular option again, that I have in this video, is that very cool dual same side exit that will dump before the passenger side rear tire, much like the older SVT Lightenings. They also offer the same exact system a little longer, that will dump after the rear tire. A little bit more of a traditional configuration. They also have the very popular dual split side exit system, and just a more traditional single side exit system as well. So again, as you can see guys, they have just about something for everyone. Now all these systems that I just mentioned are going to utilize the same MF Series muffler here, guys. So don't expect a huge variation in tone from one system to the next. Instead it's going really just going to boil down to what kind of look you're after with your exhaust, and how much dough you want to spend. As far as a tone you can expect when installing the Magnaflow MF Series here. Well, you guys heard the sound clips. Ultimately you can be the judge. But in my opinion guys, this is one of my favorite exhaust systems for the Ecoboost powered trucks, and here's why. You're getting just a little bit more tone over that factory system. Again, these are Turbo V6 engines. A lot of us guys don't want to really advertise that too much. We know it's not a V8. It'll never sound like a V8. So if you can get something that says, "Hey, I'm not stock. But at the same time, I'm not going to drive the family crazy," well again, this is gonna be a great system for you. Breaking out the wake the neighbors scale, I'm going strong two out of five here, guys. Again, just slightly louder than your factory system. Interior noise is practically non-existent. So a perfect choice for a daily driver, or family hauler that does see a lot of road trips. But let's talk about how Magnaflow achieves that nice, deep tone here with their cat-backs. And as you might imagine, a lot of it's going to come down to the MF Series mufflers that they incorporate with a lot of their Ecoboost or truck systems in general. You're going to find a perforated tube inside of the actual muffler itself. And also a combination of a stainless steel wrap, and an acoustic material that does a great job of rounding out the sound with their systems. But again, you are getting that nice, deep, rich tone with the Magnaflow here. I like to call it a nice full bodied tone. You're not getting the high end, raspy pitch with the Magnaflow Systems whatsoever. So if that's what you're into, this is a great choice. You're also getting that straight through muffler. Again, you might see a little bit more performance out of the truck with this system. But ultimately when you're adding a cat-back to your newer Ecoboost F150, you're mainly making a sound, and an appearance upgrade more so than a performance upgrade. Breaking down the fine details here with the construction, guys, you're going to find 3 inch mandrel bent tubing. It's a smaller system overall, as you can see. And of course the three a half inch, brightly polished, slash cut tips. They look awesome when installed on a truck. Again, I really dig this style of system. You're looking at 409 grade stainless steel here throughout. Again, they do a great job at reducing corrosion. Help keep the price down slightly compared to those more expensive 304 grade systems. Everything's made in the USA, and everything is backed by a lifetime warranty. On the topic of price, guys. I think you'll find a lot of the Magnaflow options here on the site for you F150 are going to fall on the higher side of the mid-level price range. And what does that mean to you? Well, these things aren't gonna set you back as much as the Corsa stuff or the Borla stuff price for instance, but you are gonna be dropping just south of a 1,000 bucks, which still is a good chunk of change, I'll give you that. But you have to factor in you're getting some pretty solid materials, and a A plus build quality. Now if you really like the dual same side exit configuration, but you have a really tight budget, MBRP is gonna make a few systems that will give you this similar look. It's not gonna be as nice as the Magnaflow. But it will definitely get you there, if that's what you want. As I mentioned at the top of this video here, this is gonna be a simple one out of three wrenches on the difficulty meter when it does come time to get everything bolted up. In fact, removing your factory system, getting this new guy in place here, only gonna take you about an hour or two using some basic hand tools. And by basic, I'm talking 13 and a 15 millimeter socket. Cordless impactor air will certainly help the job go a lot quicker but overall, you can do this thing with basic hand tools on your back if need be. Now this is a Supercrew or Supercab specific truck. So go ahead and remove that factory system first. Get the new Magnaflow in place in reverse order, starting from front to back. And you should be making noise in no time. As an Ecoboost owner myself, I really enjoy the Magnaflow MF Series Cat-Back based on the sound alone. Now again, a lot of us V6 owners don't exactly want to crank up the volume, like the V8 truck owners out there. And if that does sound like you, then I really do think you'll enjoy the system. Pair that with a quality build, the great materials, and the very cool dual same side exit configuration, and again, you've got a great system if you don't mind spending close to 1,000 bucks. So that's my review of the Magnaflow MF Series Cat-Back which you can find right here at AmericanMuscle.com.

    Tough, Aggressive Growl. Let your 2005-2010 GT or 2007-2010 Shelby GT500 Mustang growl with a Roush Extreme Axle-Back Exhaust System. This innovative Roush exhaust system features straight-through high-flow resonators, providing increased air flow and that unique tough, guttural sound with no in-cabin exhaust drone.

    Quality Roush Construction. Designed for a durable long life and corrosion resistance, the Extreme Axle-Back is constructed from mandrel-bent 2.5" diameter 409 aluminized stainless steel tubing. Utilizing stock mounting points and pre-welded hangers, this axle-back features (2) 4" flash-chromed 304 stainless steel dual wall tips that have been completed with the "ROUSH" logo for impressive looks.

    Application. This Roush Extreme Axle-Back Exhaust is designed to fit the 2005-2010 GT and 2007-2010 Shelby GT500 Mustangs with the factory rear valance, not cutting or fabrication required.

    Fitment: 2005 2006 2007 2008 2009 2010 Details

    MPN# 421915

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

    What's in the Box
    • (2) Axle-Back Assemblies
    • (2) Dual Wall Tips
    • (4) Clamps
    Installation Info
    Tech Specs
    Axle-Back Exhaust Specifications
    Piping Material: 409 Aluminized Stainless Steel Tip Material : 304 Stainless Steel w/ Chrome Flashing
    Piping Size: 2.5" Tip Size: 4"
    Muffler Type: Straight-through Fitment: 2005-2009 GT Mustangs
    Will it fit my Mustang?

      Customer Photos (18) Submit Your Photo

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        Questions & Answers (31)

        5 Top Rated Questions

        Will these fit with the Mustang Pypes Long Tube Headers w/ Off-Road X-Pipe (05-10)?

        • These will fit just fine yes!

        Helpful (1)

        Will the roush exhaust work with the bbk longtube headers? Also my car has straight pipes on it, will I need to buy anything else for the roush exhaust or will it work with what I have on there now?

        • The Roush Extreme Axle-Back Exhaust will fit with BBK Long Tube Headers. They are designed to direct replacements for the factory axle back exhaust, and do not need any additional parts for installation.

        Helpful (1)

        Will the Roush Extreme Axle-Back Exhaust fit on the pypes true dual x-pipe conversion kit for the 2005-2009 v6 mustang?

        • Yes, the Roush Extreme Axle-Back Exhaust will fit on an 05-09 V6 Mustang with a True Dual X Pipe Conversion kit

        Helpful (1)

        Are these basically muffler deletes? Or are they actually “mufflers”

        • This Roush Extreme Axle-Back Exhaust are extremely aggressive but they do have resonators built into the unit.

        Helpful (1)

        I know that they state 'no in-cabin drone' but want to be sure. My current aftermarket exhaust has a terrible drone between 2K-3K rpm. Do you experience any such in-cabin drone with these?

        • This exhaust will not cause your vehicle to drone at idle or at highway speeds.

        Helpful (1)
        Post Your Question
        10 More Questions
        My car is a regular v6 mustang. Will I still be able to use these for my car? 1 answer
        I have a tuned mustang 09 with roush axle back I'm having a problem because of the axle back it's too loud, is it loud because my car is tuned or there is another reason, please can you help me . Thanks 1 answer
        Are these 50 State Legal? 1 answer
        I have a 2008 GT500 and I want to do an offroad H-pipe with the Roush Extreme exhaust, but I am not sure whether to buy an axle-back or cat-back when pairing it with an aftermarket offroad H-pipe. What is the difference? I will be sticking with my stock headers. 1 answer
        How useful would a hanger kit be for this exhaust and would it help long term thank you 1 answer
        How would these sound in comparison to the Flowmaster Outlaws? I cant decide because I want a loud exhaust thats got bite and sounds great but videos just dont do justice. 1 answer
        If I have stock pipes and I get this would I need to change the pipes too or would it be fine 1 answer
        Will the Roush Extreme mount to my 08 Shelby GT500’s stock muffler mounts or do I have to buy new mounting brackets? 1 answer
        Will this exhaust line up to my 2006 roush stage 2 mustang rear bumper? I know the square tips will work. Stock mustang gt exhaust wont line up correctly is why i ask. Thank you, Andy 1 answer
        Where’s the decal that comes with it ? 1 answer

          Customer Reviews (100+) Write a Review

          Overall Rating 4.8

          out of 5 stars

          Installation Time:Afternoon

          Installation Cost:0-$100

          • Loudness / Volume 4.708738 4.7
          • Exhaust Note 4.805825 4.8
          • Fit & Finish 4.679612 4.7
          • Bang For Your Buck 4.519231 4.5



          • 5/5

            Installation Time: Less than 1 Hour

            May 14, 2019

            Awesome Exhaust

            This was the second set of exhaust placed on my Mustang. I had flow-master and these are so much better. They are not so loud that they distract people riding, but have a significant roll and poping (when gearing down. You will not be disappointed.

            IVANDB

            Year: 2005 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Shop Install

            April 29, 2019

            Rowdy Roush Extreme Axle backs.

            I had stock mufflers on my 4.6 Mustang and although it sounded good, I needed to wake it up a bit. I ordered the Roush Extreme Axle Backs Exhaust and it makes the car sound perfect. I was concerned about being to loud and even more concerned about having a drone sound. I have an automatic transmission and I do notice a slight drone while shifting from first to second and second to third but then it quits. Highway speed is perfectly quiet with no drone. I opted to have them installed at a location muffler shop since it did require removal of the mid pipe of the exhaust and I wasn't up for that. Eighty dollars and 45 minutes later, I was roaring up the road. Great sound.

            Dandydon

            Year: 2009 Submodel: GT

            Helpful (2)

          • 3/5

            Installation Time: Shop Install

            Installation Cost: 0-$100

            April 23, 2019

            Awesome

            Sounds great much louder than the Magnaflows I had on the car

            Boosh

            Year: 2006 Submodel: GT

            Helpful (0)

          • 4/5

            Installation Time: Less than 1 Hour

            March 29, 2019

            Great sound but overpriced

            First of all these sound fantastic on my otherwise stock GT (CAI w/tune) and so far I have not noticed any drone. I replaced my Borla Touring Axleback (much too tame for my taste) with these. Highway noise is noticeable but not in a bad or annoying way. Fitment is good and I didn’t have any trouble installing them. For this price I would expect the finish to at least be stainless throughout.

            Hoofnit

            Year: 2008 Submodel: GT

            Helpful (0)

          • 5/5

            March 24, 2019

            Roushtastic

            Great sound, just what I was looking for. Clear instructions included for a fairly easy install. I completed install solo with basic tools in my garage.

            08GTCS

            Year: 2008 Submodel: GT

            Helpful (1)

          • 4/5

            Installation Time: Afternoon

            March 12, 2019

            Nice Soumd

            The Rousch exhaust sound perfect. No drone. One slight disappointment is that on one side the exhaust hang a little lower. I’ll need to adjust to make them even. Love the sound.

            Greatgolf7

            Year: 2010 Submodel: GT500

            Helpful (0)

          • 2/5

            Installation Time: Afternoon

            February 14, 2019

            An excellent exhaust. Not so excellent handling.

            I love this exhaust. Period. There is not question that this is the one to go with if you own a 05-10 GT. However, upon opening the box, the ends of the pipes that were supposed to connect to the tail pipe were severely bent and not round. It took a long time to carefully get them round enough to fit. Kinda a let down for the price.

            PjB

            Year: 2005 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            January 13, 2019

            Amazing Sound!

            Best sound when paired when a pypes off road x pipe. This is already loud without the x pipe. Took time to install this only because I had an x pipe in as well. plus two of the manifold bolts broke twice and they had to be ordered new ones. The Roush Extreme's were simple to install and tweaking the fitment of the pipe is simple.

            NicholasK

            Year: 2010 Submodel: GT

            Helpful (4)

          • 5/5

            Installation Time: Afternoon

            January 10, 2019

            Roush extreme

            Exactly what we were looking for me and my husband couldn't be happier extremely loud

            TyannaC

            Year: 2005 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: 0-$100

            January 01, 2019

            2nd try

            I bought these to replace the Borla stingers I had previously installed on my 2010 gt. The Borla mufflers sounded pretty good outside the car, but inside they had the 2nd worst resonation that I have ever heard. (The worst was Magnaflow mufflers on a Corvet.) Since both of these cars have the mufflers at the very back of the body I believe this contributes to more resonation. The Roush do have some resonation, but nothing compared to the Borla stingers. The Roush system also sounds much better outside the car, with a more muscle car tone. With cats still on they are well within legal sound limits. They sound similar to the new Mustangs and are probably the best sounding axle-back available for the 4.6.

            StevenP

            Year: 2010 Submodel: GT

            Helpful (2)

          • 4/5

            Installation Time: Less than 1 Hour

            December 08, 2018

            new mufflers

            easy install growl like they mean it. seems to add a little more giddyup.. lol

            RobertB

            Year: 2010 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Weekend

            December 04, 2018

            Friends LOVE it. Family HATES it

            After finally completing installation after a week of waiting because I cut too much pipe, I quickly learned that your buddies will enjoy this one a lot more than your relatives. I love it personally and I think it’s the best choice if you want to give your dual exhaust V6 a better sound

            DonaldM

            Year: 2007 Submodel: V6

            Helpful (4)

          • 5/5

            Installation Time: Afternoon

            December 03, 2018

            Roush 2008

            Just installed these on my 08 Roush Mustang Stage 3 and I love the growl these pipes make my car sound. At cruising speed 2000 rpm they sound nice inside the car not obnoxious to me. When you let off the gas and start down shifting it sings to me, snap , crackle and pop. Some people might not like. Install was about hour and half not too bad. I got these on sale on Black Friday for $440.00. Well worth the money to me.

            James

            Year: 2008 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Less than 1 Hour

            October 31, 2018

            Awesome sounding exhaust!

            Well I finally went for it! I had Flownaster outlaws befoe and they sounded a little raspy. I wanted something a little deeper a of course louder. The Roush Extremes answered solved my problem. They are loud at start up but after warm up they are great no drone inside with a nice rumble while driving! Beware once you hit the pedal it opens up a just screams!!! If your looking for what I call a sleeper exhaust this is it. Well worth the money. Easy install too me about an hour at home.

            JohnC

            Year: 2005 Submodel: GT

            Helpful (5)

          • 5/5

            Installation Time: Less than 1 Hour

            October 31, 2018

            The best

            Its The best exhaust for a 05/09 mustang!! Sound GR GR GR very low, at High rpm The sound is wow//

            MaxF

            Year: 2007 Submodel: GT500

            Helpful (6)

          • 5/5

            Installation Time: Afternoon

            October 25, 2018

            Rowdy Roush

            Went back and forth on whether to buy this system of the Borla system. I am glad that I went with this system. It sound really good at low RPMs and calms down when cruising down the highway. Very happy

            MartinO

            Year: 2008 Submodel: GT

            Helpful (5)

          • 5/5

            Installation Time: Less than 1 Hour

            October 03, 2018

            ABSOLUTE BEST AXEL BACK ON THE MARKET!!!

            First off, I’m not affiliated with Roush, nor am I sponsored. This is my frontal, non-biased oppinion. FIRST OFF, this exhaust is LOUD! I was planning on buying this axel back, and pair it with a cat less X-pipe, (off-road). BUT, after hearing it ROAR, I’m leaving it!!! The install was SUPER easy, and it sounds AMAZING! My friends have Borla Atak, and Flowmaster Outlaw, and they BOTH have asked to trade for my Roush Extreme. It beats EVERYTHING on the market, and it the MOST bang for your buck. I HIGHLY suggest you pick yourself up a set of the Roush Extreme! I couldn’t be happier! Thank you American Muscle! Thank you Roush Extreme Performance! Another happy customer! - James

            James

            Year: 2010 Submodel: GT

            Helpful (6)

          • 3/5

            Installation Time: Afternoon

            September 17, 2018

            Sounds Great, fitment wasnt very good on a 2010 gt

            at the end of the day, it sounds great!. The mufflers themselves fit just fine but the welded hangers were a different story. The right front and left rear hangers had to be cut off and rewelded in the correct position. It wasnt that big of a deal BUT we did the work on a lift. If i was doing this in my driveway, i would not have been happy and would have sent it back. I have read many reviews on this exhaust and havent seen any problems like we encountered? This was on a 2010 Gt. In the end it sounds GREAT!!

            MartyP

            Year: 2010 Submodel: GT

            Helpful (7)

          • 5/5

            Installation Time: Less than 1 Hour

            August 30, 2018

            Awesome

            When I bought my 06 GT it had a Corsa muffler. I wanted more sound and these do not disappoint. I prefer the sound of the Roush to Flowmaster

            Xwng13

            Year: 2006 Submodel: GT

            Helpful (4)

          • 5/5

            Installation Time: Less than 1 Hour

            August 24, 2018

            Great product

            Sound amazing!!!! Especially paired with long tube headers!

            Ethan

            Year: 2008 Submodel: GT

            Helpful (5)

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