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Magnaflow Street Series Cat-Back Exhaust (15-17 GT)

Item 389030
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      Review & Installation Video

      Hi everyone. Justin with'm going to be taking a closer look at the Magnaflow Street Catback Exhaust System fitting your 2015 Mustang GT.Now before we start breaking down the Magnaflow, I want to remind you guys to subscribe to our YouTube channel, if you haven't done so already, for more exhaust overviews and sound clips in addition to other great Mustang content.So the Street Catback from Magnaflow is just that, a perfect exhaust for the street for those of you looking for a little bit more power and sound out of your 2015 GT, or want an exhaust that you can live with every day.Now with that being said, the Street Catback probably won't win you any muffler revving contest in regards to overall volume. And if that's something you're concerned with, then you might want to check out the Competition Series Catback instead, also from Magnaflow.Either way, if you want to hear what more 2015 owners are saying about this very exhaust, then click on the link below to head back to our product page at if you're not there already.The Street's Classic 30 muscle car rumble is made possible thanks to the slightly more traditional chambered mufflers and brightly polished four-and-a-half inch tips. Now, this entire system has been constructed from 100% stainless steel including the three-inch mandrel-bent tubing, the included crossover or X-pipe, which takes place of that suitcase known in the factory exhaust system, and finally, these chambered mufflers which I just talked about.Now it is also worth mentioning that this system is considerably lighter when compared to your factory exhaust. So besides that nice little benefit of power and sound, you can also expect to shave roughly 30 pounds from your factory exhaust.Removing your factory exhaust and installing the new Magnaflow will be made much easier here in the 2015, thanks largely in part to these cars being independent rear suspension, meaning you won't have to mess with the over axle pipes.So that being said, removing that factory exhaust and getting this thing bolted up should only take you about two hours from start to finish using basic hand tools.Now it's time to hear how the Magnaflow Street Catback sounds compared to our factory exhaust.

      Product Information

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


      • Classic Muscle Car Sound
      • Street Series Muffler - Straight-Through Design
      • Durable Stainless Steel Construction
      • 3" Mandrel-Bent Tubing
      • 4.5" Polished Stainless Tips
      • Fits All 2015-2017 GT Mustangs, Including Fastback and Convertible


      Free Flowing Exhaust. Magnaflow delivers the ultimate exhaust for the 2015-2017 S550 GT Mustang with their Street Cat-Back Exhaust. By reducing back pressure for a free flowing exhaust, this catback produces more power and torque where it belongs - at the rear wheels.

      Classic Muscle Car Sound. Give your coyote powered 2015-2017 GT the deep, classic sound it deserves with a Magnaflow Street Cat-Back. The included Street Series Mufflers feature a free-flowing, straight-through perforated stainless steel core, with stainless mesh wrap and acoustical fiber fill to deliver that smooth, deep muscle car tone.

      Magnaflow Quality. Constructed from durable 3" diameter mandrel bent stainless steel tubing for it's corrosion resistant properties, this Magnaflow Cat-Back features two Street Series mufflers with brightly polished 4.5" stainless tips, that exit in the stock locations for impressive muscle car looks and sound.

      Application. Made to be a direct bolt on, this Magnaflow Street Cat-Back Exhaust will bolt straight up to the factory Mid-Pipe without any extra modifications required on both Fastback and Convertible 2015-2017 GT Mustangs.

      Note. Coupon codes cannot be applied to this product.

      Fitment: 2015 2016 2017

      Magnaflow 19100

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (43)

      Write a Review

      Ratings Summary

      4.7 out of 5 overall rating from 43 customers

      Installation Time: Full Day

      Installation Cost: $100-$250

      • April 06, 2020

        5 2015 GT - olsonader


        I love this catback system. It was a perfect fit and sounds amazing, plus the fact that you loose about 35 pounds of weight really helps. The exhaust is not to loud but has a nice rumble to it and that is what I was looking for. I could not be happier with it.

        Helpful (0)
      • February 18, 2020

        4 2017 GT - MichaelG Installation Time: Afternoon

        Great Fitment and Sound!

        Installation was straight forward. Perfect fit. Had these for about 6 months now. At first the frequency of the new exhaust note kind made me feel nauseated, but that went away after the next drive. Sounds like a proper Mustang now! I've shaken it down after a few months now, and the only thing I can say that would be a "con" is the drone in 6th gear if you're not accelerating or at least going 80 mph. I like to keep it in 5th to avoid the drone. Love the sound in the lower gears! Magnaflow is the way to go! Tech Tip: make sure you unplug the differential sensor cable before you remove the old exhaust and tie it out of the way. I broke the cable when removing the factory exhaust (hanger got caught on the way down and ripped the cable out of the connector and pins), I tried to repair, but the pins do not come out. I ended up purchasing a new connector with a pig tail from Ford(green cable in the pic). Took all day, but otherwise this should have been an afternoon install.

        Helpful (1)
      • October 04, 2019

        4 2017 GT - EricHa Installation Time: Afternoon

        Great looking and sounding exhaust

        This exhaust is much quieter than the glass packs with H pipe that were previously installed. It has a great low rumble, and nice tone when the revs increase. It is a little quieter than I was expecting, so no worries if you are wondering if its too loud. Not at all. Overall a great sounding and high quality exhaust! A little too pricey for me to give that 5th star though.

        Helpful (0)
      • September 07, 2019

        5 2015 GT - Gonzo Installation Time: Afternoon

        Awesome Exhaust

        Love the sound of this exhaust. Not to obnoxious. Very happy with this system for my wife’s 2015 GT.

        Helpful (0)
      • July 15, 2019

        3 2016 GT - Jim Installation Time: Afternoon

        Sounds great but fitment issues

        This system is designed to fit both the fastback and convertible models. Overall quality of materials was very good including the polished mufflers and exhaust tips. Installation was generally easy and straight forward and comparable to other systems I have installed. However, the hangar rod on the left muffler was not welded in the correct position causing the exhaust tip to be about 1.5 inches low when placed in the stock hangar mount (note: the right side muffler was correct and fitted up perfectly). My solution was to cut the hangar rod and re-weld it in the correct position. Not a big deal but shouldn't have to do this with a premium cost system, thus the 3 star rating. Sound is great, just as expected.

        Helpful (3)
      • February 17, 2019

        5 2015 GT - TroyM Installation Time: Shop Install Installation Cost: $100-$250

        Perfect upgrade

        Was looking for a great sounding exhaust upgrade that wasn't too loud. This fit the bill perfectly for my 2015 Mustang GT convertible. Great tone, gets loud enough when you get on it.

        Helpful (3)
      • October 10, 2018

        5 2017 GT - ThomasB Installation Time: Shop Install Installation Cost: $100-$250

        Muscle car rumble without making a scene

        I'm exceptionally pleased with how my 2017 GT sounds now. It definitely ups the ante regarding idle purr and across the board, but not in an obnoxious way. The sound is just loud enough, and I can't imagine getting anything that's twice this loud like some of the other products for sale (unless that's your thing). I had it professionally installed along with the Ford Racing Pack 3 (plenum and CAI), and overall that took about 2.5 hours. I'd consider this system a must-do if you're looking for a more muscle car sound! Also the tips look amazing.

        Helpful (8)
      • August 09, 2018

        5 2015 GT - KF Installation Time: Shop Install Installation Cost: $100-$250

        Just the right amount of rumble....

        Originally purchased a Magnaflow Foose exhaust for my wifes 50th Anniversary Mustang GT. Unfortunately, that muffler proved to be defective (started rattling after a few weeks), but AM worked with me to get another exhaust, but this time went with the Street. The note is exactly what we were looking for, a nice deep rumble to let everyone know you're sporting a powerful V8 under the hood, and enough bark when you get into the "go pedal". The large tips fill out the rear valance cutouts perfectly, and the system looks great underneath. All in all, very pleased with this system.

        Helpful (9)
      • July 25, 2018

        5 2017 GT - ShawnV Installation Time: Afternoon


        This exhaust far exceeded my expectations. The sound is nothing short of amazing. Easy install. No drone, you can hardly tell it's aftermarket until you really get on the go pedal. This kit was everything I was looking for. 10/10 would recommend.

        Helpful (6)
      • July 15, 2018

        5 2016 GT - JefferyP Installation Time: Less than 1 Hour

        Easy flow

        This Cat-Back is awesome. Just so easy to install and the sound is just perfect. Not too loud inside or out but the rumble is there for sure. Removed sound tube and plugged the hole. Did not need that anymore after putting on the Magnaflow.

        Helpful (14)

      Questions & Answers (17 answers)

      5 Top Rated Questions

      I am looking for a upgrade to make factory exhaust and I like both this Magnaflow Street cat-back and the American Thunder cat-back which system would give me a nice deep tone while keeping the system on the quite side, and which one is quieter?

      • Both of the exhausts will be similar in overall volume, and the Magnaflow Street cat-back would make a great choice if you are looking for a nice deep tone without making it too loud.

      Helpful (4)

      is this exhaust 50 state drive by noise legal?

      • Unfortunately, this Magnaflow catback exhaust system is not going to be 50 state drive by noise legal. We do recommend checking with your local shops/laws to see what exhaust systems would be allowable.

      Helpful (3)

      Is this system quitter than the stock exhaust?

      • This exhaust is going to be an increase in sound over the stock exhaust.

      Helpful (2)

      Maybe i should have asked my last question a different way. What long tube catted headers will fit the magnaflow street system? I want to use stainless works. Any ideas?

      • The Magnaflow Street Cat-Back Exhaust will work with the Stainless Works Catted Long tube Headers.

      Helpful (1)

      is the part number the same for the convertible as the fastback ? my mustang: 2016 GT Convertible.

      • The Magnaflow Street Cat-Back Exhaust will have the same part number for both models yes.

      Helpful (1)
      Post Your Question
      10 More Questions
      Is this exhaust quieter than the MBRP Race? I am looking for a quieter catback exhaust. 1 answer
      In an above question you mention it will pass CARB in California. What is the EO or executive order testing number? 1 answer
      Is there drone at highway speeds 1 answer
      will this muffler system fit my new 2016 Mustang convertible GT? 1 answer
      Will this system fit a set of Borla long tube off road headers? 0 answer
      I have a 2017 GT with a PD supercharger. Currently running Flowmaster American Thunder axle back with Flowmaster Scavenger X-pipe. The drone is unbearable making the car very unpleasant too drive. Will I have the same issues with this system as the Flowmaster? 1 answer
      Do you have to add a new tune to the car after adding the new exhaust? One of the videos shows an error light on the dash, is this hidden info in plain sight? 1 answer
      Can you pair with roush axle back? 1 answer
      How would this exhaust system butt up to a set of long tube headers. Would I have to modify the x pipe to fit or should it seat well with a set of long tubes? 1 answer
      Do you sell the street mufflers by themselves? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Right muffler assembly
      • (1) Left muffler assembly
      • (1) Right tailpipe assembly
      • (1) Left tailpipe assembly
      • (4) clamps

      Tech Specs

      Cat-Back Exhaust Specifications
      Piping Material:Stainless Steel Tip Material :Polished Stainless Steel
      Piping Size:3"Tip Size:4.5"
      Muffler Type:Straight-throughFitment:2015-2017 GT

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