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Corsa Xtreme Axle-Back Exhaust (11-14 GT; 12-13 BOSS 302)

Item 100512
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      Review & Installation Video

      Hey I’m Justin with, 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.

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • 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


      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

      MPN# 14317

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (100+)

      Write a Review

      Ratings Summary

      4.9 out of 5 overall rating from 100+ customers

      Installation Time: Afternoon

      Installation Cost: 0-$100

      • July 21, 2019

        5 2014 GT - Rich02gt

        Must have

        By far the best exhaust I’ve had in any of my mustangs. Plus I can’t wait to drive this car everyday

        Helpful (0)
      • July 11, 2019

        5 2013 GT - AaronR Installation Time: Less than 1 Hour

        2013 Mustang GT Corsa Xtreme exhaust install.

        Put the stang on a few ramps to raise it some. It is a bit difficult to remove the old exhaust but once you do it's not hard at all. Worth every penny. Smile is a bit bigger when driving now. Love the way it makes the rear look. Sounds great! Deep growl. When you stomp on it, it gets even better. best part though, NO DRONE!!!

        Helpful (0)
      • June 17, 2019

        5 2014 GT - Jjhill520 Installation Time: Afternoon

        Corsa Extreme

        This exhaust is top notch quality. It looks amazing and sounds even better. For an axle back this thing will melt faces. Corsa claims zero drone and is 100 true. If ur looking for sexy and loud and a super easy install this is for you!!!!

        Helpful (0)
      • May 24, 2019

        5 2013 GT - BigD Installation Time: Afternoon

        Quiet when needed; loud when wanted

        When I first start it up and it is idling, it is very quiet. When I roll the windows up and I am sitting at a stoplight, it is quieter than stock exhaust. All of that is a good thing for the following reason: When I stomp on it, it sounds loud and absolutely amazing!! I have not heard any other mustang exhaust that sounds this good!! I have the option of waking everyone up in the neighborhood, or driving off quietly in the morning. As a adult with a house, wife, and two kids, I did NOT want something that sounds like a redneck, Saturday night dirt track, race car. This sounds loud, mean, and high-quality muscle!! As far as installation goes, it could not have been easier. Everything lines up perfectly, and it is a very lightweight product. As long as the car is up in the air, anybody can install it with simple tools. I did notice some discrepancies with the instructions versus what you should actually do to install it, but is easily figured out. There are two 5.0 Mustang‘s at my work. One is a FlowMaster, the other is a Roush. Mine is by far louder and better sounding!! Mine tells everyone I am arriving to work. EVERYONE!! To sum it up, this is one of the most expensive axle-back exhausts you can buy, and I would have paid more for this exhaust because not only is it exactly what I wanted, but it is also the highest quality product and greatest sound I could buy!

        Helpful (1)
      • April 15, 2019

        5 2014 GT - RolandB Installation Time: Less than 1 Hour

        Corsa Extreme

        amazing fit, bolted right up, the tone is VEEEERY raspy for those that are not looking for that, (that is what i wanted). no drone on the highway, screams up top. tons of popping on the way down between shifts and when decelerating. one of the exhaust tips does reach out farther than the other one however, but that might be the way i mounted it.

        Helpful (2)
      • April 09, 2019

        5 2014 GT - Moonshine


        Sound and look great! Install was right at two hours as advertised. Loud enough with no drone on the road till you open it up. Then she growls.

        Helpful (0)
      • April 03, 2019

        5 2014 GT - BCLifestyle Installation Time: Afternoon


        When I say loud I mean EXTREMELY loud. These axle-backs really opened up my 5.0. I have BBK long tube headers, catted x-pipe, and corsa xtreme axle-backs and the thing SCREAMS. I knew it was going to be loud by reading the reviews but I did not expect them to be as loud as they are. The nice part is, if you shift early and keep it under 2500rpms, they are fairly quiet. Once you start climbing up in RPM’s though, they are stupid loud. Cold starts are almost unbearable from behind the car. They are not too raspy but have a great lower tone when driving (not nearly as low as the Roush’s). Very very little drone on highway doing 70 in 6th. Even though this is the loudest setup I have ever heard, I absolutely LOVE them. No drone, you can be quiet when you want, and the finish and look of them is beautiful. The pops and crackles are amazing as well. If you are on the fence about brands, put Corsa to the top because the build quality and finish is spot on and the no drone is great. I came from a set of flowmaster American thunders that droned so bad.

        Helpful (2)
      • January 26, 2019

        5 2012 GT - ReginaldS Installation Time: Less than 1 Hour


        Absolutely the best decision to buy these.i had the flowmaster outlaw which were loud in and out of the car but these corsa extreme make you forget how loud they really are because they are really quiet on the inside of the car but the outside completely opposite. Worth every penny.

        Helpful (2)
      • November 26, 2018

        4 2012 GT - 5Liters Installation Time: Afternoon

        Great Product! Poor Service...

        I installed these mufflers on my 2012 Mustang GT. The sound is perfect and the quality is high. However, I received my mufflers with a manufacturing defect. The driver side muffler had a noticeable blemish on the driver side exhaust tip. This did not happen during the install as there was plastic blocking where the damage was. I didn't notice the blemish until I took the plastic off and got it in the sunlight. offered a $50 credit to remedy this. I don't feel that this is acceptable service from American Muscle. These mufflers cost $900 and the tips are welded, so they are not easily replaced - let alone for $50. AM should have offered a replacement themselves. However, I contacted Corsa and they sent a replacement. I would give AM 2 stars at best. The mufflers are 5 stars and so is Corsa, but I knocked a star because I shouldn't have to deal with any blemishes on a $900 axle-back setup, but I understand that it happens from time to time. The exhaust is great. I'm very disappointed with my first experience with

        Helpful (4)
      • August 30, 2018

        5 2011 GT - BillT Installation Time: Afternoon

        Neighbors not up? They are now!

        I was hesitant paying that amount of money for just axle-Backs. I am sure glad I did, as the old adage states, you get what you pay for. And these are top notch! The tone at a cold start up is outstanding, and you will def turn heads at WOT, or even at 5000RPMs. One of the best features: no drone whatsoever while cruising at 2000RPMs. The picture of the black tips does not do it justice at all. These things are plain sexy. Install was pretty straight forward. Used jack and jack stands. Get yourself a helper and save ya some headaches. The worst part was taking the stock ones off. If you're on the fence, take the leap and get these. You'll be glad you did!

        Helpful (5)

      Questions & Answers (16 answers)

      5 Top Rated Questions

      Will these fit the borla over axle pipes?

      • Unfortunately the Borla over axle pipes will only work with Borla exhaust setups.

      Helpful (1)

      I have the Magnaflow Competition Catback on my 2012 GT. Would installing these require just bolting off the mufflers on the Magnaflow Catback and bolting on the Corsa in their place up to the Magnaflow over-axle piping, or is there cutting required with my current exhaust?

      • The Corsa Xtreme Axle-Back Exhaust w/ Black Tips will install in place of the Magnaflow muffler assemblies on the Magnaflow Competition Cat-Back Exhaust without the need for cutting.

      Helpful (1)

      Correction... you guys are incorrect. These corsa extreme bolt right up to borla over axles and lth over axles. The corsa is 3 inch but necked down right at the connection point to fit stock 2- 3/4". I should. I ought to be acknowledged for pointing this out also.

      What’s the difference between the corsa xtreme for the 05-10 Mustang gt and the 11-14 Mustang gt

      • The difference between the Corsa Xtreme for the 05-10 GT and 11-14 GT is the fitment.

      Helpful (0)

      What over axle pipes are recommended to be used with the corsa extremes?

      • We only offer an LTH and Borla overaxle pipe that both come out to 2.75 inches in diameter. This axleback is 3 inches, so modification would be necessary for proper fitment.

      Helpful (0)
      Post Your Question
      10 More Questions
      What over axle pipes are these supposed to be used with? 1 answer
      Hi, does AM sell Corsa Xtreme Axle-Back with quad tips? 0 answer
      Are these louder than ataks??? Keep in mind i have a 2011 coyote with longtube headers and a catless x. 0 answer
      Do these fit on a 2011 GT500? In the description I cannot find that information, but normally it should have the same installation requirements as a 11-14 GT? 0 answer
      I have a 2014 Mustang GT. I want to combine these Corsa Xtremes with an off-road X Pipe. What else will I need besides the X pipe and the corsa Xtremes? What will I need to connect those and can I purchase it here? Also I was wondering if I would have to get a tune if I get an x pipe 1 answer
      how would I be able to pair these with my BBK LTH and BBK O/R x pipe? currently running pypes superbomb catback but looking to get new over axles 1 answer
      Will these fit a 2014 rs3 with the Roush valence? 1 answer
      I bought the corsa extreme axle backs and want 3 inch exhaust all the way to the headers but cant find over axle pipes that are 3 inch like in the cat back exhaust systems that you can buy. Any ideas? 1 answer
      I have the pypes pype bomb super system catback would this be a direct bolt on? 1 answer
      The product description says 3' mandrel bent tubing, does this mean it'll bolt up to my 3' over axle pipes? or do i need to get the factory pipes? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Driver Side Muffler Assembly
      • (1) Passenger Side Muffler Assembly
      • (2) Clamps

      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

      • Boss 302 - 12, 13
      • GT - 11, 12, 13, 14

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