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Corsa Sport 3 in. Axle-Back Exhaust w/ Polished Quad Tips (15-17 GT Premium Fastback; 18-20 GT Fastback w/o Active Exhaust)

Item 390912
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Market Price $1,272.38 You Save 12% ($146.39)
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    Features & Details

    • Corsa Sport Axle-Back
    • High Performance Sound without the Drone
    • Straight-Through Sport Mufflers Featuring Corsa's Patented RSC Technology
    • 304 Stainless Steel Construction
    • 3" Mandrel-Bent Tubing w/ Step-Down Flanges
    • Mirror Polished, Twin 4" Pro-Series Tips
    • Cut & Clamp Design
    • Proudly Designed, Engineered and Manufactured in the USA
    • Fits 2015-2017 Premium Package GT Fastback Mustangs equipped with a Roush Rear Valance
    • Fits 2018-2019 GT Fastback Mustangs without Active Exhaust
    Sport Performance Sound. Your Fastback GT Mustang has the looks, the power and the handling of a sports car, but not the sound. If you want your GT to sound like it should, then you need to invest in a Corsa Performance Sport Axle-Back Exhaust. Corsa's Sport Axle-Back has been acoustically styled and tuned to give your Coyote powered S550 Mustang a robust sport performance sound under acceleration and a nice growl at idle, without any annoying drone while cruising. As an added bonus a Corsa Sport Axle-Back will also improve your Pony's exhaust flow for an increase of 5 RWHP and 4 RWTQ.

    RSC™ Technology. Corsa Performance engineers all their mufflers using their very own patented Reflective Sound Cancellation® Technology (RSC™). RSC™ Technology is designed to give your Mustang's exhaust an aggressive sound under acceleration and a drone-free experience while cruising.

    Quality Construction. Corsa Performance proudly manufactures their Axle-Back Exhaust systems right here in the good ole USA. This Corsa Axle-Back is mandrel-bent from 3" diameter, premium grade, 304 stainless steel tubing for excellent exhaust flow and enduring corrosion resistance. The system features two high flow, straight-through sport mufflers that end with bright, mirror polished twin 4" Pro-Series tips. Step down flanges are included, so that this 3" Corsa Axle-Back can be installed with the factory 2.5" exhaust.

    Cut & Clamp Installation. The installation of this Corsa Axle-Back Exhaust System will require cutting and removing the factory muffler assemblies and clamping the new muffler assemblies in place. Clamps and installation instructions are provided.

    Application. This Corsa Sport Axle-Back Exhaust System with Polished Quad Tips is designed to fit 2015-2017 Fastback GT Mustangs equipped with the factory Premium Chassis Package (Trim Levels: 400A/401A) and the 2018-2019 Fastback GT Mustangs that is not equipped with the Active Valve Exhaust System.

    Application Note. The 2015-2017 Model Years will require the use of the Roush Rear Valance 421894 or 421919 for proper installation (valance sold separately). Does not fit convertible models.

    Fitment: 2015 2016 2017 2018 2019 2020 Details

    MPN# 14334

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (2) Twin Exhaust Tips
    • (1) Right Muffler Assembly
    • (1) Left Muffler Assembly
    • (1) Right Over Axle Intermediate Pipe
    • (1) Left Over Axle Intermediate Pipe
    • (2) Step Down Flanges - for use with OE Size Exhaust
    • Clamps
    • Installation Hardware
    Installation Info
    Tech Specs
    Axle-Back Exhaust Specifications
    Piping Material:304 Stainless SteelTip Material :Polished 304 Stainless Steel
    Piping Size:3" - 2.5" Step Downs IncludedTip Size:4" Twin
    Muffler Type:Straight-throughFitment:2015-2017 GT Fastback
    Will it fit my Mustang?

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        Questions & Answers (7)

        5 Top Rated Questions

        Can I fit it for my 2017 Regular GT (Non-premium) version?

        • The Corsa Sport 3 in. Axle-back Exhaust will not fit the non Premium GT's as it requires the use of the Roush Rear valance, which will only fit the Premium rear bumpers.

        Helpful (1)

        Will this work with any or all of the cut and clamp H-pipes?

        • This will work with most cut and clamp H-pipes yes.

        Helpful (0)

        I am currently running the Corsa Extreme catback exhaust on my 18 Mustang GT. Can I bolt the Corsa sport axleback right up without any cutting or welding. Looking to get headers and extreme is way to loud on my buddies setup.

        • The Corsa Sport 3 in. Axle-Back Exhaust should be a direct bolt in with your Corsa Xtreme Cat-Back Exhaust.

        Helpful (0)

        I know it says you need a roush valence but my question is, will it fit a 2015 mustang gt with the gt350 rear bumper?

        • The Corsa Sport 3 in. Axle-back Exhaust will work with the GT350 bumper also yes.

        Helpful (0)

        Would this fit my v6 mustang with no concept gt350 bumper kit for all 2015 and up mustang base models?

        • This Corsa Sport Axle-Back Exhaust System with Polished Quad Tips is designed to fit 2015-2017 Fastback GT Mustangs equipped with the factory Premium Chassis Package and will not fit the V6 models.

        Helpful (0)
        Post Your Question
        2 More Questions
        Will the quad tips change the sound compared to the regular axle back? 1 answer
        What is the inlet diameter of the quad tips? 1 answer

          Customer Reviews (6) Write a Review

          Overall Rating 4.7

          out of 5 stars

          Installation Time:Afternoon

          Installation Cost:$100-$250

          • Loudness / Volume 4.166667 4.2
          • Exhaust Note 4.833333 4.8
          • Fit & Finish 4.333333 4.3
          • Bang For Your Buck 4.666667 4.7

          • 5/5

            May 16, 2019


            Super loud have stainless power 1 7/8th longtubes also very loud but sounds amazing


            Year: 2015 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            August 05, 2018

            Sounds awsome!

            The sound Is amazing with little to nothing inside the car is unreal! But outside is very loud, my money well spent!


            Year: 2017 Submodel: GT

            Helpful (5)

          • 4/5

            Installation Time: Afternoon

            June 23, 2018

            Great product as always from corsa

            I did this setup with a resonator delete x pipe. My recommendation is to just spring for the full cat back instead. The install is easy but it kills me knowing there is only about 14 inches of oem exhaust pipe left between the corsa pipes and the x pipe. If you want to delete your resonators. Get the cat back.


            Year: 2018 Submodel: GT

            Helpful (6)

          • 4/5

            Installation Time: Afternoon

            April 07, 2018

            Tremendous Sound

            The quads on a 2017 GT fastback look fantastic. Running with Roush Rear Valance. Fitment needed some tweaking but they are pretty even, left and right pairs. But the note produced by these bad boys is incredible. I've compared this to the cat back version in person and this exhaust note is better. Corsa told me it would sound a bit deeper than the cat back due to the factory resonators (which aren't very restrictive, by the way) still being in place, and they were right. The axle back is more a bit more rumble, with less rasp. At idle, it just purrrrs. When you run up past 3000 rpm is starts to get loud and surly sounding. Not obnoxiously loud, but just right. NO drone on the highway, and most of the noise projects back behind you, so in the cockpit you get the nice note, but not too much volume. You get what you pay for.


            Year: 2017 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            July 12, 2017

            Corsa Exhaust Sounds Awesome

            not only do the exhaust tips give the Mustang a more aggressive look, when get on it the sound let's people know it's a Mustang that's coming, but one that's got a bit more punch to it!


            Year: 2017 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Afternoon

            January 27, 2017

            corsa quads

            I got this for my 2017 gt w/black accent package. The quad tips simply look amazing. The sound from the axle back is a deep throaty rumble. There is absolutely no drone as corsa claims. It is louder than stock even with the factory resonators in place. Not overbearing at all. Corsa's quality is unmatched as is the fit and finish. The chrome tips really stand out against the black valance from roush. Only three stars for loudness because all of the sound goes out the back and not in the cabin, which is what I wanted. It is expensive and is why i gave it four stars for bang for your buck, but to me for the sound and the look, is absolutely worth it. It took me about six hours to install the valance and the axle back in my garage on ramps. Like I said it is louder than stock and has an awesome sound but I want it louder so Im waiting for the Corsa double X pipe from A.M. as well. If you want killer looks with awesome sound, this axle back wont disappoint. Highly recommended.


            Year: 2017 Submodel: GT

            Helpful (8)

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