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Corsa Xtreme 3 in. Cat-Back Exhaust - Black Quad Tips (15-17 GT Premium Fastback; 2018 GT Fastback w/o Active Exhaust)

Market Price $1,850.99 You Save 12% ($213.99)
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  • Item 390911
  • MPN# 14335BLK

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    Features, Video & Details

    • 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 GT Fastback Mustangs without the Active Valve Exhaust System

    Review & Installation Video

    Review & Install Video

    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" 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" Pro-Series tips. Step down flanges are included, so that this 3" Corsa Axle-Back can be installed with the factory 2.5" 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 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 Details

    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
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material: 304 Stainless Steel Tip Material : Black Chromed 304 Stainless Steel
    Piping Size: 3" - 2.5" Step Downs Included Tip Size: 4" Twin
    Muffler Type: Straight-through Fitment: 2015-2017 GT Fastback
    Will it fit my Mustang?

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    20 Questions / 6 Answers

    Ask a Question

    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.

      Rob D

    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)

    I’ve got a 2016 GT performance package but not premium will it fit..


    • The Corsa Xtreme 3 in. Cat-Back Exhaust is designed to work with the Premium Fastbacks.


    Helpful (0)

    Hey just wanted to know why would it not fit on convertible GT ? What other catback exhausts would you recommend as loud as this but for convertible 16 GT


    • Some cat-backs will not fit convertibles because of the extra bracing on them. We do not offer a quad tip cat-back that will fit the convertible at this time. Though, we do offer the Corsa Xtreme Cat-Back Exhaust - Black Tips, item # 393797-B, (


    Helpful (0)

    Ok so my custom 2018 mustang gt premium with performance pckg. with active exhaust doesn't get here until January. I'm lookin for loud systems and I'm interested in the "corsa Xtreme 3 in. Cat-Back Exhaust" but i was curious about the active exhaust functions. How would this work? If not, I would like to purchase something else because I have cash ready. I need to be loudddd!!!!


    • The Corsa Xtreme 3 in. Cat-Back Exhaust will not fit with Active Exhausts. We do not currently carry any exhausts that work with the Active Exhaust function.


    Helpful (0)

    Why it’s 1637 dollars here but it’s 1718 dollars in corsa’s website. I just wanna know what’s the difference?


    • The price of this Corsa Xtreme 3 in. Cat-Back Exhaust will fluctuate depending on when you are looking at the item, but this exhaust will be the same if you purchase it from AM or Corsa directly as long as the part number is the same.


    Helpful (0)

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    Customer Reviews (11) Write a Review

    Overall Rating 5.0

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:$100-$250

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

    • 5/5

      Installation Time: Afternoon

      March 10, 2018

      Won't dissapoint

      I wasn't sure if I should just get the x pipe or buy this. I'm really glad I went with this. It's really quiet while at low rpms, no droning but once you open it up it really roars. Super clean sound, definitely a must have.


      Year: 2018 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Full Day

      December 25, 2017


      I have to say i made a good choice with the Corsa Extreme quad tips my 17 S550 sounds like a thunder cat waking up the died. I drive around the city people faces turn upside down cause it so f..king loud... for all S550 owners this is the exhaust you need my friends.


      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      August 29, 2017

      Amazing system!

      I've had this exhaust on for about 8,000 miles now. It is most definitely broken in, and I couldn't be more impressed! I look forward to going to work everyday and listening to the cold start. My girlfriend always comments how she can hear me driving off every day well after I have left the neighborhood. I do a lot of highway driving and there is absolutely no drone. Step on the gas, and be prepared to hear a beautiful deep tone with hints of an exotic growl behind it. Down shifting/rev matching, you're gonna get every bit of a loud note you could want. As far as install, was right around 2 hours, ran into a hiccup when I broke the stock rear hanger taking off the stock exhaust. Other than that, no issues. Took a little tweaking to get the tips exactly straight and where they needed to sit. Overall, I couldn't be happier with my purchase.


      Year: 2016 Submodel: GT

      Helpful (0)

    • 5/5

      June 28, 2017

      a great catcback

      i have never regret it, buying this exhaust, it sounds amazing, pluse i gaind power! made the car smoother. u recommend this to every S550 owner


      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      May 12, 2017

      No regrets!

      These sound fantastic and the black polished tips look sharp. The exhaust note is loud with no drone and when you get after it, it has a shrill exotic burble to it. Sounds a little "raspy" like the GT350... but wayyy better than any exhaust I have ever had. I've had the system installed for only a week and I've already had dozens of comments at red lights about how "absolutely wicked" my car sounds.


      Year: 2016 Submodel: GT

      Helpful (5)

    • 5/5

      Installation Time: Less than 1 Hour

      May 09, 2017

      Loud but in a good way

      First off, I have Stainless Works catless long tubes installed already. So I can't contest to the sound before long tubes. I switched from an MBRP Race and glad I did. The MBRP Race had a deeper muscle car/V8 tone due to the H pipe. It sounded good at idle and lower rpm but had some drone and started shaking my interior apart after the long tube install. Decided to go with Corsa extremes. Since install, the drone is gone and the interior no longer rattles. The Corsa does have an exotic higher pitch and at WOT it starts sounding more like a v10 than a v8. I love the sound, it is intoxicating. It is stupid loud when I want it to be and whisper quiet when I need it to be (except cold start lol). The fit and the finish were top notch. Over all, I am happy with my choice to switch.


      Year: 2016 Submodel: GT

      Helpful (1)

    • 5/5

      March 27, 2017


      This exhaust is loud and raspy. The black powder coated tips are a definite.


      Year: 2015 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      January 27, 2017

      Stupid loud

      Amazing sound quality definitely recommend if you want to have that intimidating loud system. You will break necks for sure.


      Year: 2016 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      October 05, 2016


      Exhaust sounds great and the Black Tips really set off the back!! Great product!!


      Year: 2015 Submodel: GT

      Helpful (3)

    • 5/5

      September 02, 2016

      aggrasive sound!

      No regrets of getting the Corsa xtreme......................................


      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      May 09, 2016

      Corsa Xtreme quad tips

      Replaced my borla stype catback with these new corsa Xtreme quad tips, they sound awesome, extremely loud but quiet when cruising around. They really have no drone at all the noise is behind you, I also have stainless works off-road headers. These will definitely get people's attention. Plus the quad tips really separate the look from single tip exhausts.


      Year: 2015 Submodel: GT

      Helpful (2)

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