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Corsa Xtreme Cat-Back Exhaust with Black Quad Tips (15-17 GT Premium Fastback; 18-20 GT Fastback w/o Active Exhaust)

Item 390911
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Market Price $1,936.82 You Save 9% ($170.83)
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      Product Information

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


      • Corsa Xtreme Cat-Back
      • Deep Aggressive Sound without the Drone
      • Straight-Through Xtreme Mufflers Featuring Corsa's Patented RSC Technology
      • Double Helix X-Pipe Included
      • 304 Stainless Steel Construction
      • 3" Mandrel-Bent Tubing w/ 2.5" Step-Down Flanges
      • Black Chromed, Twin 4" Pro-Series Tips
      • Proudly Designed, Engineered and Manufactured in the USA
      • Fits 2015-2017 Premium Package GT Fastback Mustangs equipped with a Roush Rear Valance
      • Fits 2018-2020 GT Fastback Mustangs without the Active Valve Exhaust System


      Xtreme Aggressive Sound. Be heard long before being scene by installing a Corsa Performance Xtreme Cat-Back Exhaust System on your GT Mustang. Acoustically engineered and tuned, this Corsa Xtreme Cat-Back will give your 5.0L V8 Mustang a throaty, aggressive sound under acceleration and a deep growl at idle, all without any annoying drone while cruising. An Xtreme Cat-Back Exhaust is ideal for those GT Mustang owners who don't care if they wake up their neighbors. As an added bonus a Corsa Xtreme Cat-Back will also improve your Mustang's exhaust flow by 43% for an increase of 5 RWHP and 4 RWTQ.

      Race Car Growl. Corsa Performance Xtreme Cat-Back Systems feature a very unique double helix X-Pipe that replaces the factory resonator Mid Pipe. The double helix "X" crossover design not only helps improve exhaust flow for an increase in power, but it also adds a crisp raspy, race car growl to the sound of your Mustang's exhaust.

      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 Cat-Back Exhaust systems right here in the good ole USA. This Corsa Cat-Back is mandrel-bent from 3 inch diameter, premium grade, 304 stainless steel tubing for excellent exhaust flow and enduring corrosion resistance. The system includes a double helix X-Pipe and two high flow, straight-through Xtreme mufflers. The mufflers feature a pair of black chromed twin 4 inch Pro-Series tips. Step down flanges are included, so that this 3 inch Corsa Cat-Back can be installed with the factory 2.5 inch exhaust.

      Application. This Corsa Xtreme Cat-Back Exhaust System with Black Chromed Quad Tips is designed to fit 2015-2017 Fastback GT Mustangs equipped with the factory Premium Chassis Package (Trim Levels: 400A/401A) and the 2018-2020 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# 14335BLK

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (42)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 42 customers

      Installation Time: Afternoon

      Installation Cost: $100-$250

      • March 17, 2020

        3 2019 GT - JosephR Installation Time: Less than 1 Hour

        Great sound, doesn't fit good

        Sounds absolutely amazing. Real attention getter. Unfortunately, the fitting is off. They don't center on the rear cutouts, and are aimed down. The only way to fix this is to cut and re-weld free hangers, which will void the warranty. Mixed feelings all around. Should fit better for the cost

        Helpful (1)
      • March 08, 2020

        5 2018 GT - DavidDH Installation Time: Less than 1 Hour

        Ladies love it

        well, I get happy every time I start up my Mustang

        Helpful (0)
      • February 03, 2020

        5 2019 GT - Bretrogwrs Installation Time: Shop Install Installation Cost: 0-$100

        Sounds amazing!

        My mustang sounds amazing now! Turning heads all day.

        Helpful (1)
      • December 04, 2019

        5 2018 GT - andrew155 Installation Time: Less than 1 Hour

        product makes the car sound way meaner not annoyingly loud once you get to a speed and stay there sounds great while accelerating though.

        Helpful (2)
      • September 30, 2019

        5 2018 GT - Cbpowerred Installation Time: Afternoon

        Excellent sound

        The best sound ever. I was Debating of all the reviews if this was too loud for me or had too much drone. That is great excellent quality sound no drone in the car when you don’t want it. Installed by my self in my garage, took almost 3 hours.

        Helpful (0)
      • August 26, 2019

        3 2019 GT - GTOnly

        Loud but poor fitment

        Installed and have had 3 months. It’s worth it and it’s LOUD. It’s fun to hear it every morning and evening going to work. This is the reason I wake up at 5am to go to work. However 3 stars because the fitment was really bad. The left side tips and right side tips are not even and the right side is lower than the left. It looks bad.

        Helpful (5)
      • June 02, 2019

        5 2018 GT - 18magnastang

        Two thumbs up

        Amazing sound ! ! Not too loud when cruzin but when you get on it WOW! Took about two hours by myself to take the stock exhaust for and install the new exhaust .

        Helpful (1)
      • May 02, 2019

        5 2019 GT - Toastys550 Installation Time: Afternoon

        Sound Like Any Other

        Cruising with this catback is quiet, step on your throttle and you will hear your car starting to grumble begging you for more, give it more and you won't be disappointed. Those cold starts? Well there is nothing like the Corsa Extreme Start ups. Took me about 4 hr to install. I did it with jack stands at home and you will definitely need two people to make the install easier and efficient. The hard part is not installing the system, most of your time will be spent adjusting to get that perfect fitment. P.S. your neighbor's and your family might start to hate you at 6am in the morning.

        Helpful (2)
      • April 28, 2019

        5 2015 GT - ZF Installation Time: Afternoon

        Sounds nasty love it

        Great quality, great fit and sounds great! More words to get to 50 characters

        Helpful (2)
      • April 18, 2019

        4 2018 GT - WilliamP Installation Time: Less than 1 Hour

        Everything but the fit

        LOUD. Easy install, I recommend removing the rear exhaust grommets though as the instructions they provide don’t really make sense, and the fit is not as spot on in the rear as I would like it to be. Sits very close to the valence. But the exhaust itself is amazing

        Helpful (0)

      Questions & Answers (42 answers)

      5 Top Rated Questions

      Hi, i have a 2018 mustang GT base. Would this set up fit even though its not a premium? Thanks!

      • This cat-back exhaust will fit all 2018 Mustang GT models that are not equipped with the active exhaust option.

      Helpful (2)

      Will these have any negative affect on emissions? I live in California and don't want to have to deal with that sort of thing. Also I have a 2018 GT with a Performance Package that already comes with stock Quad tip exhausts so will these fit without any issues?

      • The Corsa Xtreme 3 in. Cat-Back Exhaust will install after all of the factory emissions equipment, making this legal for California Smog testing. One thing to check into would be local exhaust volume regulations, as this can vary greatly across the country. This should have no issues working with your 2018's valance since you already have quad tips.

      Helpful (1)

      will it fit the V6 if the premium bumper cover is installed on the car, or are there any other complications?

      • Unfortunately, the Corsa Xtreme 3 in. Cat-Back Exhaust is designed for the 15-17 GT Mustangs. This Cat-Back may not bolt up correctly to a V6. Thus requiring modifications for proper fitment.

      Helpful (1)

      What’s size of clamps that the Corsa exhaust required to clamps down the x pipes onto the Catback ?

      • You would want clamps that would accommodate for 3 inch piping.

      Helpful (0)

      What headers are compatible with my corsa extreme

      10 More Questions
      Will this fit a 2018 convertible gt 1 answer
      So if my 2019 mustang has active exhaust, these won’t fit unless I buy the Corsa extreme exhaust “with active exhaust?” Don’t really care for the active exhaust to begin with. 0 answer
      What long tube headers were used in the video? 0 answer
      I've seen several videos with this exhaust, and most of them have the deeper throaty tone, but the video posted above has more of a raspy tone. Is it deep and throaty or raspy? Thanks! 1 answer
      Will this exhaust for my 2019 gt non premium? 1 answer
      I have a 2016 GT premium everything is stock I don’t want to change my rear bumper, will this quad exhaust fit??? 1 answer
      Will this fit my 2018 saleen white label? 1 answer
      will this fit a 2016 base model GT? 1 answer
      Will this exhaust crackle and pop? I'm looking to get a loud quad tip exhaust for my '15 GT that does just that. 1 answer
      With the x pipe and catback exhaust in place, how much more horsepower will be added on? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Twin Exhaust Tips
      • (1) Right Muffler Assembly
      • (1) Left Muffler Assembly
      • (1) X pipe 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

      Tech Specs

      Cat-Back Exhaust Specifications
      Piping Material:304 Stainless SteelTip Material :Black Chromed 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

      • GT - 15, 16, 17, 18, 19, 20

      Compatible with Premium Package Fastback GT Mustangs equipped with required 15-17 Roush Rear Valance only.

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