Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
1-877-887-1105
Every day 8:30AM EST - 11:00PM EST
Win 1 of 3 Exhaust Kits! Enter Daily!

Kooks Axle-Back Exhaust - Black Tips (15-17 GT Fastback)

Market Price $852.99 You Save 12% ($98.67)
Starting At

$754.32

FREE Shipping

  • Item 386646
  • MPN# 11516210

Local Install Shops

Quoted installation from $125

View 3 Shops

near 19355 (change)

Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.

Will this fit your Vehicle?

In Stock Ships same business day.
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features, Video & Details

    • Aggressive Muscle Car Exhaust Note
    • Improved Performance
    • Better Exhaust Flow
    • 3" Round Race Mufflers
    • OEM to 3" Stainless Steel Tubing
    • 4" Black Slash Cut Tips
    • Fits 2015-2017 GT Fastback Mustangs

    Review & Installation Video

    Review & Install Video

    Hey, guys, this is Stephanie from AmericanMuscle.com, and I'm going to be reviewing this Kooks axle-back exhaust for Fastback 2015 and '16 GTs. My first impression of this axle-back is that it's my style. It's a good mix between loud and deep, and what I really like is that the sound stays consistent throughout the RPMs. It doesn't get raspy or crackle on those higher RPMs. Even from inside the car, the system sounds good and there's no drone, which is perfect for a nice cruise or some ripping around town. Keep in mind that this is an axle-back, so you'll be keeping all of your cats and your stock resonator. Now, down the road, you can always change out the resonator for another mid-pipe option and enhance the sound of this axle-back even more, and that's one of the nice things about an axle-back. It offers room to grow and change through different mid-pipes, or off-road setups, or headers. I'm going to rate it as a three on the loudness scale, which is a pretty solid rating for just an axle-back. So we're looking at three-inch stainless steel tubing with four-inch polished slash-cut tips and a pair of Kooks high-flow racing mufflers coming in at just over the $600 mark. I'd say that this is right at the middle of the road with the price when we look at the exhaust market for the S550 GT and from a brand that's known for their exhaust products. I'd say that this is a good deal, here, if you're looking for a louder muscle car sound from an axle-back, and you even have the option of black or chrome tips. Install-wise, if you don't know by now, if you're installing an axle-back, you're going to be doing some cutting, and this axle-back is no different as a standard cut-and-clamp design that we're used to seeing with other axle-backs, and for that reason, I'm going to stick with what I've said in the past and call this a two out of three wrenches on the scale. Time-wise, it shouldn't really take too long to install, probably about an hour or so, but you do have to be careful when you're cutting, and remember that this system's not compatible with convertibles. I still just recommend a fresh Sawzall blade and eye protection, just to make sure everything goes smoothly. Wrapping this up, Kooks has provided a great-sounding, good quality axle-back with a fair price point for the new S550s. This thing sounds great, and if you're looking for a loud, deep and dirty exhaust tone, then this should be a good option for you. As always, feel free to check out the full lineup of axle-back options, and we'll see you here at AmericanMuscle.com.

    Aggressive Exhaust Note. Give your S550 Mustang GT Fastback that loud aggressive exhaust note of a classic 60's muscle car with a Kooks Race Muffler Axle-Back Exhaust System. Featuring (2) round stainless steel race mufflers with 4" black tips, this axle-back will not only improve your exhaust flow, but will add some stealth to the rear end of your 2015-2017 Pony.

    Durable Stainless Steel Construction. Constructed from OEM to 3" diameter stainless steel tubing for strength and corrosion resistance, this Kooks Race Muffler Axle-Back Exhaust System includes (2) high-flow 3" round race mufflers that are finished off with impressive 4" black T304 stainless steel slash cut exhaust tips.

    Application. This Kooks Race Muffler Axle-Back Exhaust with Black Tips is specifically designed to fit the 2015-2017 GT Fastback Mustangs in combination with the factory exhaust system. Cutting of factory exhaust is required for installation. Not compatible with convertibles.

    Technical Note. Not legal for use on pollution controlled motor vehicles; intended for off road use only.

    Fitment: 2015 2016 2017 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • (2) Axle-Back Mufflers
    • (2) Black Tips
    • (4) Clamps
    Installation Info
    Tech Specs
    Axle-Back Exhaust Specifications
    Piping Material: Stainless Steel Tip Material : Black 304 Stainless Steel
    Piping Size: OEM to 3" Tip Size: 4"
    Muffler Type: Race Muffler Fitment: 2015-2017 GT Fastback
    Will it fit my Mustang?

    You Might Also Like

    Customer Photos

    Q & A

    No questions about this product yet.

    Ask the First Question

    Customer Reviews (15) Write a Review

    Overall Rating 4.5

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:0-$100

    • Loudness / Volume 3.928571 3.9
    • Exhaust Note 4.857143 4.9
    • Fit & Finish 4.642857 4.6
    • Bang For Your Buck 4.785714 4.8



    • 3/5

      Installation Time: Less than 1 Hour

      June 16, 2018

      Way Too Loud

      Installed these with the Ford Racing X-Pipe. Drone is way too loud and I am considering trying a set of Borla Sport mufflers in their place to try and tone this down. Contact me if you are interested.

      PaulT

      Year: 2017 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      June 05, 2018

      Review from Kooks Axle-Back Exhaust (15-17 GT Fastback)

      Kooks Axle-Back Exhaust

      My Kooks Axle-Back Exhaust make my Stang sound like beast!! Awesome!

      FrankM

      Year: 2017 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      May 07, 2018

      Review from Kooks Axle-Back Exhaust (15-17 GT Fastback)

      Kooks axle back exhaust

      Great add on mod! Nice low rumble at idle and really sounds off when you hit the gas. Very little drone at highway/cruising speeds which is nice.

      Roaddog

      Year: 2017 Submodel: GT

      Helpful (3)

    • 3/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      April 21, 2018

      Review from Kooks Axle-Back Exhaust (15-17 GT Fastback)

      Not bad

      Sounds is deep and throaty and normal range and screams at WOT. 6th gear is unusable on the highway due to unbearable drone though. If I had known about the drone, I would not have purchased.

      Sean

      Year: 2015 Submodel: GT

      Helpful (3)

    • 5/5

      March 24, 2018

      Awesome

      Great sound... not super loud but can still tell the difference!

      ThomasH

      Year: 2017 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      July 06, 2017

      Review from Kooks Axle-Back Exhaust (15-17 GT Fastback)

      Rolling thunder

      I had this exhaust fitted on it's own, as wanted a louder deeper muscle car tone. Boy does this exhaust deliver, sounds great right through the rev range, burbling at low revs while sounding like rolling thunder on WOT. One note of caution, it is louder than I was, expecting, but now have got used to it am v happy. Plus it seems to have got a bit smoother after 1,000 miles of running. I am based in the UK and the car truly sounds like nothing else you get on the roads here, love it!

      JoelL

      Year: 2017 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      June 20, 2017

      Awesome!

      Simple install and quality parts. Now it sounds like a real mustang! Zero drone.

      BobbyW

      Year: 2017 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      June 15, 2017

      Great Exhaust!

      I ordered the kooks axle back exhaust for my 16 GT and it fit and sounds great! I have it installed with a heart throb x pipe and the sound is great, very deep and aggressive. Makes the car sound like a GT should!

      CaseyH

      Year: 2016 Submodel: GT

      Helpful (3)

    • 1/5

      Installation Time: Less than 1 Hour

      May 30, 2017

      Unhappy

      These are a overpriced glasspack. Made my 5.0 sound like a 6 cylinder with a hole in the muffler. Bad part is I cannot even return them since they been installed.

      TonyR

      Year: 2017 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      March 20, 2017

      Review from Kooks Axle-Back Exhaust (15-17 GT Fastback)

      Kooks Axle Back

      These Kooks Axle Backs are awesome Love the complete difference in exhaust tone from stock just gives it the Muscle car sound I paired mine with the SR X-Pipe and pretty much made my own catback. Has somewhat of a drone but not a terrible one. Great product quality is superb.

      EricG

      Year: 2016 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      December 14, 2016

      Review from Kooks Axle-Back Exhaust (15-17 GT Fastback)

      Perfect!!

      Install took about an hour max. Recommend to tack at the axle end clamps so it won't pivot up and down. Has a great rumble, deep sound. They do rasp a little once you're on it but no crackle or pop. I have a H-Pipe so the sound is awesome. Close to a classic sound. Great exhaust.

      Leauxs

      Year: 2015 Submodel: GT

      Helpful (4)

    • 5/5

      July 11, 2016

      Exhaust

      WOW! What can I say about this axleback. I already had an x pipe on my car which took out the resonator delete, so when I paired it up with this axleback it sounds nasty! Very deep and raspy, it gives the car the attitude it deserves!

      Jordan

      Year: 2015 Submodel: GT

      Helpful (5)

    • 5/5

      June 28, 2016

      Review from Kooks Axle-Back Exhaust (15-17 GT Fastback)

      kooks axle back

      kooks axle back exhaust was a easy install. great fit and finish. took about an hour and a half. very nice low sound and no pop or crackle when shifting. no drone at highway speeds. very good muscle car sound just right.

      Furface

      Year: 2015 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      April 28, 2016

      Review from Kooks Axle-Back Exhaust (15-17 GT Fastback)

      Deep

      First of all, very DEEP. I have mine with an h-pipe and omg very happy with my choice. Was looking for something deap but with a little bit of drone and these kooks really deliver. Im sure that just as an axel back they are great but an x-pipe or h-pipe paired with these would bring a smile no matter what.

      Fyn15

      Year: 2015 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      April 24, 2016

      Review from Kooks Axle-Back Exhaust (15-17 GT Fastback)

      Utterly Thrilled!!!!!

      Short and sweet! The video on here does these no justice but was enough for me to buy them. Now that they are on, I get compliments on how good my car sounds. I raced a GTO the other night and when we got to the next traffic light that was his first comment. How good my car sounds. He had the best position to hear em if you know what I'm saying. He was behind me. Thoroughly pleased with my purchase, no regrets. I'm almost 40, I wasn't just looking for noise, I wanted more of a sound of a worked up car. I have a very aggressive sound, but we're not in kiddy town.

      HUTCH

      Year: 2016 Submodel: GT

      Helpful (4)

    Related Mustang Categories