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Corsa Xtreme 3 Inch Cat-Back Exhaust (15-20 GT350)

Item 397734
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Market Price $2,085.98 You Save 12% ($239.99)
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$1,845.99 (kit)

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      Product Information

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


      • Throaty Aggressive Sound
      • Increased Overall Performance
      • Straight-Through Mufflers With Corsa-Patented RSC Technology
      • Includes Double Helix X-Pipe
      • T-304 Stainless Steel Construction
      • 3-inch Mandrel-Bent Tubing
      • 4.5-inch Slant Cut, Polished 304 Stainless Steel Tips
      • Bolt-On Installation
      • Fits 2015-2020 Mustang GT 350 Models


      Aggressive Sound. With Corsa's Xtreme 3in. Cat-Back Exhaust system your Mustang GT will have an aggressive throaty growl upon acceleration that will make people turn around and notice. While idling, the sound will turn to a deep growl. But don't worry about the noise because this system prevents any annoying droning from disturbing you inside your car. This is all thanks to Corsa's Reflective Cancellation Technology (RSC).

      Bark and Bite. This Corsa exhaust system is not all bark and no bite. Thanks to improved exhaust flow, your pony will have increased horsepower and torque. You might even see an improvement in gas mileage.

      Made to Last. Corsa builds their Xtreme 3-inch Cat-Back Exhaust Systems with 3-inch diameter 304 stainless steel tubing that is Mandrel-bent for improved exhaust flow and better-spent gas handling. The double helix X-pipe and two straight-through mufflers are built for the long haul. 4.5-inch polished, slash cut tips will add to the aggressive look of your GT.

      Bolt-On Installation. This Xtreme Cat-Back exhaust system is a direct replacement for stock exhaust systems. It bolts directly to factory mounts and requires no cutting or special tools for installation.

      Application. The Corsa Xtreme 3-inch Cat-Back Exhaust System has been engineered to fit 2015 to 2020 Mustang GT350s.

      Fitment: 2015 2016 2017 2018 2019 2020 Details

      MPN# 14348

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (2)

      Write a Review

      Ratings Summary

      5.0 out of 5 overall rating from 2 customers

      Installation Time: Afternoon

      • June 11, 2018

        5 2016 GT350 - DeepBlue13 Installation Time: Afternoon


        Fantastic!! Probably the best sounding exhaust I have ever heard on a mustang! Would recommend Corsa to anyone looking for an amazing sound, perfect fitting top-notch product!!

        Helpful (14)
      • May 13, 2018

        5 2017 GT350 - TimR Installation Time: Afternoon

        That sound!!!

        I was totally taken back in the difference in sound. Corsa all the way!!! Match with kooks long tube headers, and mid pipes. You’re going to love it!

        Helpful (15)

      Questions & Answers (9 answers)

      5 Top Rated Questions

      How much flow does this system move compared to stock ? What are the performances gains or losses compared to stock any information?

      • This exhaust will flow 18.28% better than stock with the valves closed and 85.92% better with the valves open. Power gains should be in the 15-20hp range.

      Helpful (2)

      Will this work with the exhaust modes can they still be changed between quiet and loud

      • No, this does not offer the active exhaust function.

      Helpful (1)

      Will corsa extreme 3 in cat-back exhaust pass Missouri emission law?

      • It can honestly depend on their emission laws. We recommend checking with your state ordinances or a local shop to confirm.

      Helpful (0)

      Live in Missouri. Will car pass emission test?

      • It can honestly depend on the state and their emissions laws as it can vary. Generally cat-back exhausts will be fine, but we highly recommend contacting your state ordinances or a local shop to confirm.

      Helpful (0)

      I have a 2016 mustang Gt with the Shelby Gt350 rear diffuser/valence. Will this exhaust work on my GT ? If it requires slight modifications that’s fine but can it be Done ?

      • Unfortunately, even with the GT350 rear valance installed the Corsa Xtreme 3 in. Cat-Back Exhaust is only designed for GT350 and GT350R, we would suggest something like this here:

      Helpful (0)
      Post Your Question
      4 More Questions
      How much does the complete system weigh? 1 answer
      I recently bought this exhaust for a gt and was wondering if I would have to buy the whole set up again. I now have a gt350 and would like to transfer the exhaust from my gt. Do I need different adapters? 1 answer
      Does this exhaust retain the use of the factory motors for the multi-mode exhaust? 1 answer
      If I installed the gt350 rear valence on a 2016 premium gt would this exhaust fit? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Left Muffler Assembly
      • (1) Right Muffler Assembly
      • (1) Double Helix X Pipe Assembly
      • (1) Left Intermediate Pipe
      • (1) Right Intermediate Pipe
      • (2) Step Down Flanges

      Tech Specs

      Will It Fit My Mustang

      • GT350 - 15, 16, 17, 18, 19, 20
      • GT350R - 15, 16, 17, 18, 19, 20

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