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

Market Price $1,644.75 You Save 32% ($523.33)
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  • Item 389030
  • MPN# 19100

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    Features, Video & Details

    • 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

    Review & Installation Video

    Review & Install Video

    Hi everyone. Justin with americanmuscle.com. I'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 americanmuscle.com. 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.

    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 Details

    What's in the Box
    • (1) Right muffler assembly
    • (1) Left muffler assembly
    • (1) Right tailpipe assembly
    • (1) Left tailpipe assembly
    • (4) clamps
    Installation Info
    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-through Fitment: 2015-2017 GT
    Will it fit my Mustang?

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    11 Questions / 6 Answers

    Ask a Question

    Is this exhaust quieter than the MBRP Race? I am looking for a quieter catback exhaust.

    DavidR

    • The Magnaflow Street Cat-Back Exhaust would be quieter than the MBRP race cat-back yes.

      Ricky36

    Helpful (1)

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

    BillH

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

      AMRickyD

    Helpful (0)

    Can you pair with roush axle back?

    CoB

    • The Roush Axle-Back Exhaust, item # 387039, (https://www.americanmuscle.com/roush-axleback-2015gt.html) is specifically designed to bolt to the factory location. We cannot guarantee it will work with the piping on the Magnaflow Street Cat-Back Exhaust.

      AshleyK

    Helpful (0)

    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?

    ColinM

    • We would only recommend using the Magnaflow Street Cat-Back Exhaust in combination with other Magnaflow products. That is the only way we can definitely guarantee fitment.

      DanH

    Helpful (0)

    In an above question you mention it will pass CARB in California. What is the EO or executive order testing number?

    JaymeK

    • The Magnaflow Street Cat-Back Exhaust installs after all OEM emissions equipment, making this exempt from CARB standards.

      Rob D

    Helpful (0)

    Do you sell the street mufflers by themselves?

    RyanC

    • Unfortunately we do not carry the mufflers included in the Magnaflow Street Cat-Back Exhaust separately.

      AMJEFF

    Helpful (0)

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    Customer Reviews (32) Write a Review

    Overall Rating 4.7

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$100-$250

    • Loudness / Volume 3.935484 3.9
    • Exhaust Note 4.903226 4.9
    • Fit & Finish 4.677419 4.7
    • Bang For Your Buck 4.516129 4.5



    • 5/5

      Installation Time: Afternoon

      May 15, 2018

      First Exhaust!!! AWESOME

      I wanted something that sounded tough but didn't want to sound annoying when going through the neighborhood. I love the growl of the exhaust. Not the loudest, but perfect for me.

      GilbertG

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      April 18, 2018

      Sweet Growl

      I just put the Magnaflow street cat-back exhaust on my 2017 GT. I did the installation by myself by using a jack and stands to support the old system. Yes the install went smoothly as well. Everything liked up well and no problems whatsoever. The mufflers are polished to a chrome like finish with the Magnaflow logos. The tips are like chrome and look fantastic. When I fired it up, I could not wipe the grin off my face. It has a wonderful deep sound and growl to it that is just what I was looking for. Im 67 and it reminded me of my old 67 Camaro SS. Cant wait for my cold air intake and tuner to arrive next. And probably a new set of rear tires soon....

      RonA

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      March 19, 2018

      Easy and sounds good

      Was looking for classic mussel sound but not crazy loud ! I have a magnaflow on my raptor and it sounds good so I went with the same on the mustang. We are very happy with it. Sounds like it’s supposed to now! Very easy to install! Did it myself but I happen to have a lift in one of my garages so that makes it easier! Took about an hour.

      ScottV

      Year: 2015 Submodel: GT

      Helpful (1)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      January 21, 2018

      Good choice

      I’ve had Magnaflow exhausts on some of my other cars over the years, that’s the main reason I picked them for my ‘16 GT convertible. Glad I did. They are louder than stock and drone a bit between 1000 and 2000 rpm, but have a nice deep growl above that. Fit and finish are superior to the others I looked at. I have a CAI also and, with the exhaust, the car really wakes up when driving. I have ‘t done any dyno comparisons however my butt dyno says it’s noticeable. On a sunny day, with the top down, it makes for an excellent driving experience.

      BillH

      Year: 2016 Submodel: GT

      Helpful (2)

    • 2/5

      Installation Time: Afternoon

      October 05, 2017

      One Size Fits All Causes Issues

      If you look at the description, you'll see that this cat-back fits both fastback and convertibles. For other systems, you will noticed they are designed for one or the other. This means the rear tailpipes are fabricated to accommodate for the extra bracing the convertible has and fastback doesn't. This "one size fits all" design causes issues with fastbacks that have the rear sway bar (as in my case). The driver side tailpipe was making constant contact with the rear sway bar and causing vibration throughout the vehicle. I had to submit a warranty claim as this is an issue I shouldn't encounter in a product that costs this much. Sounds amazing - but, major fitment issues as described.

      Jeff

      Year: 2017 Submodel: GT

      Helpful (6)

    • 4/5

      Installation Time: Less than 1 Hour

      September 14, 2017

      Love the sound

      Realy nice deep rumble sound Not to loud but a little more would have been better i think.

      PascalD

      Year: 2016 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      September 05, 2017

      V8

      Now it sounds like the kind of car it is. Stoked !!

      BentonD

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      July 21, 2017

      Perfect!

      I had been looking at different cat-back systems and always came back to Magna Flow which I eventually ordered and installed. The tailpipes look amazing, they are high quality, and the sound is perfect - low but not excessively very loud! Totally pleased with my choice!

      VictorSWallace

      Year: 2017 Submodel: GT

      Helpful (5)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      July 09, 2017

      It's Alive!

      This is a great exhaust when it comes to for and finish. Getting rid of the factory suitcase brought the car to life. I'm not worried about letting cops know I'm a mile down the road with this catback and it sounds great rowing through the gears. A catback is an essential upgrade for any S550 and I definitely recommend this one.

      MichaelC

      Year: 2017 Submodel: GT

      Helpful (1)

    • 4/5

      July 06, 2017

      Problems with fit

      Clearance on the drivers side making contact with rear sway bar caused vibrating sound sometimes when turning. Fixed it by wrapping sway bar with a high temp wrap. Did have professional install.

      DavidL

      Year: 2015 Submodel: GT

      Helpful (6)

    • 2/5

      Installation Time: Afternoon

      July 01, 2017

      Mustang Al

      great product did exactly what I wanted .Great sound during take off but no drone at cruising speed.

      Axcell

      Year: 2016 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      June 20, 2017

      Magnaflow catback

      Nice sound without being obnoxious. Excellent quality

      AaronM

      Year: 2016 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      May 26, 2017

      Good sounds

      Gotta love a deep idle tone. I had it installed at the dealer, so I can't speak to the ease of installation, but the sound is great. It's a little louder than what I expected from listening to the videos on the site here and there is a little drone in 6th from about 1200 to 2000 rpm, but we'll worth it for the overall sound quality increase over stock.

      JohnW

      Year: 2016 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      May 15, 2017

      I made the right choice with these

      I watched lots of videos, listened to lots of sound clips, and knew that I wouldn't truly know if I liked them without buying and installing them. I got it RIGHT. The tone is exactly what I was hoping for, deep and throaty. The volume is what I was hoping for, louder than stock but not obnoxious. They sound amazing to me.

      BrannM

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      March 24, 2017

      The perfect pipes

      Could not be happier with the quality and sound of this exhaust system. Just the right amount of growl without being obnoxious. Nice sound at highway speed.

      StephenK

      Year: 2017 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      March 15, 2017

      Perfect Muscle Car Sound

      The Magnafow street cat backs sound perfect for my 2015 GT. Initially I had the MF competition cat backs. They sounded fine until I had long tube headers installed. That was just too loud for my tastes, so the street version went on and I couldn't be happier. Wish MF sold just the mufflers though. It would have saved some $$.

      HarryG

      Year: 2015 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      February 04, 2017

      Perfect GT 5.0 match

      Did a lot of research to make sure it ended up being exactly what I wanted. The demo's help but it was still hard to get the real sound. This match was perfect for my 5.0 with very little resonating sound inside. I installed this by myself (seriously), with a little planning, in about two hours. Quality design and fit. Make sure you re-torque after about two hours of drive time.

      ChrisW

      Year: 2016 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      January 20, 2017

      Great classic sound, not too loud, just right

      I was afraid to ruin the relaxing cruise aspect of my 2015 GT with a catback that was too loud/too raspy etc. I spent a lot of time listening to various videos of exhaust and I decided on the Magnaflow Street Catback. Sounds really good at startup and under load does not sound raspy (from the cockpit anyway). Using C weighting on a Radio Shack SPL meter, with the windows up: idle is about 59-60 db. Cruising home tonight I was seeing 75-80 db at 65-70 mph depending on how much the engine was pulling up hills etc. I didn't measure before the install. I can say it is louder and there is just a hint of drone around 1900 rpm, but really in tone only as I could easily talk over it. All in all I'd say it's aggressive enough without being so loud that you start to dread driving to work etc. The engine seems to be much happier too and I think there's a bit more scoot. Money well spent to get a classic muscle car to sound like a classic muscle car.

      jwg

      Year: 2015 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      January 06, 2017

      Quieter for sure

      I marginally purchased the Magnaflow Competition exhaust system, but quickly realized they were very loud on the highway, at 70 miles an hour. With that being said I ordered the Street Cat-Backs and had an immediate difference noted. I still have the deep throaty sound that I want and can only get with Magnaflow. I get the great sound I want without the internal drone I was getting with the Competition Cat-Backs on the highway. Magnaflow....the only way to go...

      SR

      Year: 2017 Submodel: GT

      Helpful (11)

    • 5/5

      Installation Time: Afternoon

      November 11, 2016

      Great product

      I went with this product because I didn't want to attract too much attention when driving down the streets. The videos don't do it justice, it sounds perfect! To me it still sounds loud but not over the top! Great product, easy to install!

      Ish

      Year: 2016 Submodel: GT

      Helpful (9)

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