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Corsa Xtreme Axle-Back Exhaust (11-14 GT, BOSS)

Market Price $862.99 You Save 17% ($143.99)

$719.00 (pair)

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  • Item 100512
  • MPN# 14317

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Features, Video & Details

  • Corsa "Xtreme" Axle-Back
  • Deep Aggressive Sound with No Drone
  • Straight-Through Mufflers Featuring Corsa's Patented RSC Technology
  • 304L Stainless Steel Construction
  • 3" Diameter Mandrel-Bent Tubing
  • Mirror Polished, 4" Pro-Series Tips
  • Made in the USA
  • Fits 2011-2014 GT and 2012-2013 BOSS Mustangs

Review & Installation Video

Review & Install Video

Hey I’m Justin with AmericanMuscle.com, here with my breakdown of the Corsa extreme axle back exhaust system fitting all 2011 and newer Mustangs. Corsa exhaust systems are no doubt one of the nicer options available for any Mustang, in addition to being one of the most advanced. Corsa incorporates the reflective sound cancellation technology or RSC as they call it, and give you the best of both worlds, an exhaust that’s going to be quiet and drone free on the highway while cruising, and one that’s going to absolutely scream and be angry whenever you’re on the throttle. Now if you’re not watching this video on our site already and you want to learn more about that RSC technology or the Corsa in general, just go ahead and click the link below to head back to the product page. Besides the technology that goes into these mufflers the build and quality of materials is also very impressive, the extreme utilizes a 304 grade stainless construction throughout, 3” piping, beautiful welds, and finally these mirror polished 4” tips, etched with the Corsa logo which as you can see do feature a very unique slash cut. Most exhaust will feature a straight up and down slash cut, but you can see the Corsa here utilizes a more side to side cut. That side to side cut actually features and fits the lines of the rear end in my opinion than the straight up and down cuts, just makes for a much cleaner appearance in the rear end. Installation shouldn’t involve anything out of the ordinary and can easily be done in about an hour using some standard hand tools. Before we jump into those sound clips I just want to remind you guys that we always try to bring you the best sound clips and exhaust clips possible, of course you get to hear a bunch of different sound clips in addition to my overviews so if you want to stay up to date with all the latest exhaust vids for your car, in addition to some other great content, just subscribe to our YouTube channel by clicking on the link below. Now let’s hear how the Corsa extreme axle back sounds compared to our factory exhaust.

Xtreme Aggressive Sound. The Corsa Xtreme axleback system is acoustically styled and engineered to give your Mustang a throaty aggressive sound under acceleration and a deep growl at idle all without interior cabin drone.

RSC™ Technology. Corsa designs their mufflers using their own patented Reflective Sound Cancellation® Technology (RSC™) to give your Mustang an aggressive sound under acceleration and a drone-free experience while cruising.

Quality Construction. Corsa Axle-back systems are manufactured in the USA from premium grade 304 stainless steel for a long life and a perfect fit. The system features two straight-through mufflers that end with mirror polished 4" Pro-Series tips, that exit in the stock location for impressive good looks.

Application. The Corsa Xtreme Axle-Back Exhaust is designed as a direct fit bolt-on upgrade for the 2011-2014 GT and 2012-2013 BOSS Mustangs.

Fitment: 2011 2012 2013 2014 Details

What's in the Box
  • (1) Driver Side Muffler Assembly
  • (1) Passenger Side Muffler Assembly
  • (2) Clamps
Installation Info
Tech Specs
Axle-Back Exhaust Specifications
Piping Material: 304 Stainless Steel Tip Material : Polished 304 Stainless Steel
Piping Size: 3" Tip Size: 4"
Muffler Type: Straight-through Fitment: 2011-2014 GT, BOSS
Will it fit my Mustang?
  • GT - 11, 12, 13, 14
  • Boss 302 - 12, 13

Most Helpful Reviews

5/5
Easy buy

Fit and finish are perfect. The other reviews are not lying. All tone, no drone. Saves me from doing full exhaust until it's time to do serious mods. Literally could not go back to any other exhaus ...

Read More
Helpful (1)

5/5
Awesome

Wanted a different sound so I got these. Took a week or so but they are getting louder like I wanted with my o/r x.

Helpful (1)

Overall Rating 5 out of 5 stars
Read All 52 Reviews

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Customer Reviews (52) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Afternoon

Installation Cost:0-$100

  • Loudness / Volume 4.666667 4.7
  • Exhaust Note 5 5
  • Fit & Finish 4.875 4.9
  • Bang For Your Buck 4.666667 4.7



  • 5/5

    August 15, 2016

    Review from Corsa Xtreme Axle-Back Exhaust - Black Tips (11-14 GT, Boss)

    Sounds as a 5.0 should

    Had roush and absolutely loved it but switched to corsa for less drone and slightly deeper and it was perfect. Amazing.

    Fogel

    Year: 2014 Submodel: GT

    Helpful (1) (0)

  • 5/5

    August 07, 2016

    Review from Corsa Xtreme Axle-Back Exhaust - Black Tips (11-14 GT, Boss)

    Awesome

    Wanted a different sound so I got these. Took a week or so but they are getting louder like I wanted with my o/r x.

    Attngetr

    Year: 2013 Submodel: GT

    Helpful (1) (0)

  • 5/5

    July 21, 2016

    Review from Corsa Xtreme Axle-Back Exhaust - Black Tips (11-14 GT, Boss)

    Easy buy

    Fit and finish are perfect. The other reviews are not lying. All tone, no drone. Saves me from doing full exhaust until it's time to do serious mods. Literally could not go back to any other exhaust

    MorbsMustang

    Year: 2012 Submodel: GT

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    June 04, 2016

    Best exhaust on the market

    The fit is perfect and the exhaust note is music to my ears. The car has zero drone when in 5th or 6th gear and once its warm is almost completely silent when coasting. When you put your foot to the floor on the other hand it demands respect from everyone around you. 10/10 Perfect all around.

    MLambert5722

    Year: 2014 Submodel: GT

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    January 06, 2015

    Expensive, but worth it

    Like most, I watched a bunch of videos and looked at reviews on the forums. The AM sound clip was pretty close to what should be expected. I wanted a deeper sound with no drone and debated between the Kooks and Corsa Xtremes. This axle back delivers on the promises. Cruising on the freeway they are not much louder than stock, but once you hit the gas they come to life. Noise inside the cabin is pretty quiet and you don't realize how loud they are until you roll down the windows. Installation was pretty easy and would definitely recommend dropping the sway bar per the instructions. Additionally, there are two mounts (one each side) that hold the front hangers to the car and instead of wrestling with them I just unbolted them from the car to make it easier to unhook. Overall, very happy with the purchase although they were pricey.

    Scott14GT

    Year: 2014 Submodel: GT San Jose, CA, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    November 22, 2013

    Good Exhaust Bang For Your Buck

    Very simple fast install, did it alone in 90 minuntes. Drove it up a set of car ramps plenty of room to work. Saved $150 to have it done by a muffler shop. The 4" curved tail pipe tips look and fit my car great.

    ski2059

    Year: 2011 Submodel: GT San Francisco Ca

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    February 07, 2014

    Best Sounding Exhaust

    I've had 3-4 different axle backs on my 2011 GT. The Corsa is definitely the best one so far. No drone at all, sounds great when cruising but is loud as a muffler delete at wide open throttle. I recommend this set up to anyone!

    Dan19

    Year: 2011 Submodel: GT Springfield , pA

    Helpful (3) (0)

  • 5/5

    January 24, 2014

    AWESOMENESS!!

    The Corsa Extreme is the perfect addition to my GT. It has a deep exhaust note I was looking for and it doesn't have any drone on the highway. Installation was straight forward and easy in my garage. You cannot go wrong with this exhaust.

    FirstGTKS

    Year: 2011 Submodel: GT Overland Park, KS, USA

    Helpful (3) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    November 21, 2013

    How the 5.0 Coyote Should Sound

    This is the Perfect exhaust for your Coyote powered mustang. Corsa hit it out of the park with this axle back system. I have heard other axle backs and they seem to sound like a "rice burner" on steroids. The "extreme" system has the deep tone I was looking for. It gets loud when you hit the throttle but not to loud. It's quiet when cruising or at freeway speeds too. Very pleased with this system. This is how a big V8 should sound!

    A3UN

    Year: 2013 Submodel: GT

    Helpful (3) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    September 16, 2013

    The "no drone" choice!

    I wanted an aggressive sound when accelerating but quiet on the highway, and that is exactly what the Corsa Xtreme gave me. I have the Xtreme axle back and x-pipe. I had the system installed at Corsa. My car was used for design and fitment for the 2011 GT convertible system. They also dyno'd the car and I gained 11hp. I was given a tour of their facility as well. It was a very pleasant experience.

    RickGTCS

    Year: 2011 Submodel: GT Canonsburg, PA, USA

    Helpful (3) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    June 11, 2014

    Corsa nailed it!

    I put these on my 2014 GT and man... the smile on my face after starting it up said it all. I don't think I stopped grinning for an hour. Installation was easy with a jack and some stands. The sound is unique and perfect. A low grumble whenever you touch the gas changes to a Indy 500 wail when you mash the pedal. Absolutely no drone. Great fit and finish.... no messing around to line up. Not cheap, but great product & great warranty. Pony up the cash.

    Kerdinglebooten

    Year: 2014 Submodel: GT NJ

    Helpful (2) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    May 21, 2014

    Great exhaust

    Exhaust was a little quieter than I expected but has a very awesome sound and grumble, quiet while cruising which is also nice so it doesn't get on your nerves. Installation wasn't bad took around 45 mins. Great exhaust.

    Beraa

    Year: 2013 Submodel: GT

    Helpful (2) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    April 22, 2014

    Worth the Money!

    I have always stayed away from Corsa as they where more expensive than the Flowmaster. I can not be more stoked about an Exhaust than I am about the Corsa Extremes. It is best of both worlds. Quiet at idle and no droan at hi-way speeds but when you get into the throttle is turns beast mode. Everyone at the track is like that is sick sounding. The slant cut in the tip matches the body lines perfect. Took me about an hour to put on with out car lifted. It is the best exhaust I have ever had on a car! Thank you Corsa my Mustang sounds the best around these parts. Everyone thanks I have had engne work done.

    Meltonm2014

    Year: 2014 Submodel: GT Asher, OK 74826, USA

    Helpful (2) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    October 20, 2013

    Corsa Xtreme, 2013 GT

    100% happy with this axle back. It is my second one on this GT and it hit the nail on the head. Nice rumble at idle and cruising. When you stomp on it, it delivers. It is worth the extra money. I recommend using the factory clamps for the best seal.

    LaFlamaBlanca

    Year: 2013 Submodel: GT FL

    Helpful (3) (1)

  • 5/5

    Installation Time: Afternoon

    May 25, 2016

    Top of the Line

    I, as well, methodically researched different options for upgrading the exhaust on my Mustang GT. This seemed to be as good as they come for the best of both worlds - it is a bit louder at idle and throatier and it is downright impressive when you open it up. It isn't obnoxious like some set ups. I would highly recommend this exhaust to any first timers looking to upgrade who might be wary of something too loud. It's only loud if you want it to be. You may quickly discover that you want it to be loud often; the sound is addicting. The slanted tips are perfect and really add to the appeal of the rear end. Overall very impressed and would say it is worth the higher price. It is quality that you are paying for it is absolute all-around quality.

    Salient

    Year: 2014 Submodel: GT

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    March 18, 2016

    Review from Corsa Xtreme Axle-Back Exhaust - Black Tips (11-14 GT, Boss)

    No drone, all tone

    The fit and finish of this axleback is GREAT. The black tips go perfectly with my SBY Boss 302. But the most important part is the tone. It is amazing. Deep, throaty, pops and gurgles... combine it with the lopey track key idle and It could almost pass for a big block. No drone at cruising rpms. Sounds like open exhaust at WOT. Rumbles like a beast at idle. I've tried other axlebacks and catbacks, but I have never been this happy with one.

    Skrapmetal

    Year: 2013 Submodel: Boss

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    February 23, 2016

    Just what I was looking for!

    This was exactly what I was looking for! I wanted something that had that aggressive sound and roared when I got on it. But since I sank alot of money into a sound system I wanted it to be rather quite at idle and cruising and it definitely is. It's absolutely perfect. Instructions were clear and easy took about 2 hours to install.

    Codyh93

    Year: 2014 Submodel: GT Las Vegas

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    January 12, 2016

    Review from Corsa Xtreme Axle-Back Exhaust - Black Tips (11-14 GT, Boss)

    12 Boss

    Picked these up for my 12 boss 302 and couldn't be happier. Install with a lift took about 30 minutes hardest part was getting the one bolt that for positions just above the stock muffler with no room for a ratchet. Once the install was complete and the car started couldnt be happier car sounds like it should now not real raspy but just enough with an intoxicating snap crackle and pop on deceleration

    Dakota

    Year: 2012 Submodel: Boss honeybrook, PA

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    December 20, 2015

    Review from Corsa Xtreme Axle-Back Exhaust - Black Tips (11-14 GT, Boss)

    MUSIC TO MY EARS!

    I read all the reviews before I purchased the Corsa Xtreme to make sure this was the right decision, since these are not inexpensive. Nearly all reviews express the no drone, great looks, perfect fit, and ease of installation,... all true. Tame enough at idle to sit at a light along side Johnny law and not get the stink eye, or puttin through a gated community without the village idiots chasing you with torches or pitchforks. But words can't express just how GREAT these babies sound when you get the revs up, drop the hammer, and rip through the gears! (Disclaimer: Always at appropriate time and place) If you love the smell of burning rubber or gun smoke, stand as close to the burnout box/track as possible for a top fuel pass, and wanna see some blood during a MMA fight, then the Xtremes are for you. So glad that these are not standard on all Mustangs, these say I am different than others, I'm an automobile enthusiast that enjoys driving American Muscle!

    EazyE

    Year: 2014 Submodel: GT Jacksonville, FL

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    December 15, 2015

    Review from Corsa Xtreme Axle-Back Exhaust - Black Tips (11-14 GT, Boss)

    The absolute best!

    The corsas deliver the best experience for your mustang period. They give you that butterfly feeling from the time you open the package. The quality of the product is clean and flawless. I wanted the extremes with the chrome tips however the black tips were on sale and for a price I could not pass up. It took me awhile to actually go through with black tips because I honestly thought they would look cheap or tasteless, boy was I wrong. I am so happy things worked out the way they did because the black tips are actually a glossy black chrome finish and it looks so good on any color. Now for the exhaust note, it's mean it's really mean, but it's only really really mean when you want it. You can take off from redlights Without causing a stir and cruise down the highway in peace. The tone is not like any YouTube video you have probably watched a hundred times but it is so much better and you will be itching to drive your car any and everywhere. The tone is deep and burly at the bottom then moves to a solid medium thump right before opening up to what sounds like to tigers fighting at 4000 rpm. It's great. If your worried about loudness it's really not I'm the kinda guy who went with the gt500 axle back first Because I didn't want loud. I heard the extremes once and had to have them. Inside the cabin is super quite, you will never get annoyed by it and you'll be able to hold conversations with all the girls who's attention you'll grab with this exhaust.

    Blue

    Year: 2011 Submodel: GT Louisiana, Baton Rouge

    Helpful (1) (0)

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