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Kooks Performance Cat-Back Exhaust (11-14 GT; 11-12 GT500)

Item 100516
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      Review & Installation Video

      Hey guys, Stephanie with I'm going to be taking a closer look at the Kooks Performance Catback for the 2011 to '14 Mustang GT and the Boss 302. Now chances are you guys are already familiar with Kooks' products, more specifically their headers, which have been around for 40-plus years and have been one of the top options for Mustang headers. Well luckily for us Mustang owners, Kooks has recently decided to apply all those years of knowledge into making exhaust systems, including this catback for the S197. So if you guys want to see more exhaust breakdowns including companies like Kooks and many others, click the link below to subscribe to our YouTube channel and be the first to learn about all the newest products for your ride.So the Kooks catback system is designed to give your Coyote Mustang an aggressive muscle car tone combined with the same quality and fitment that you expect from a company like Kooks. That aggressive tone comes courtesy of two three-inch oval race mufflers that are constructed of durable stainless steel. Now that same stainless steel construction continues with three-inch manual bent tubing throughout the system, then exit through polished 304 grade four-inch tips.If you guys are on the new product page and you don't want to take my word for it, then be sure to check out some of the detailed customer reviews and customer submitted images of the Kooks exhaust that you will find here for each and every one of their products on the site. If you're not on the site, then just click the link below to head back and see what I'm talking about. You'll also find some very helpful installation guides there.Speaking of the install, bolting up the catback is a job easy enough for most novice mechanics. It should only take you about two hours from start to finish and includes basic hand tools. But if you should have any questions or concerns regarding the Kooks exhaust or any other product for that matter, you can always feel free to reach out to a Mustang expert here at and they'd be more than happy to lend you a hand.Now let's hear how the Kooks catback sounds compared to the factory exhaust.

      Product Information

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


      • Aggressive Muscle Car Exhaust Note
      • 3" Oval Race Mufflers
      • 3" Stainless Steel Tubing
      • 4" Polished T304 Stainless Steel Tips
      • Direct OEM Replacement Upgrade
      • Fits 2011-2014 GT, BOSS and 2011-2012 Shelby GT500 Mustangs


      Aggressive Exhaust Note. Give your V8 powered Mustang the loud aggressive exhaust note of a classic 60's muscle car with a Kooks Performance Cat-Back Exhaust system, that features oval stainless steel race mufflers.

      Durable Stainless Steel Construction. Constructed from 3" diameter stainless steel tubing for strength and corrosion resistance, this Kooks Performance Cat-Back exhaust system features two high flow 3" Oval Race Mufflers that end with 4" polished T304 stainless steel slant cut exhaust tips.

      Application. This Kooks Performance Cat-Back Exhaust Kit is specifically designed to fit the 2011-2014 GT, 2012-2013 Boss 302 and 2011-2012 Shelby GT500 Mustangs.

      Fitment: 2011 2012 2013 2014 Details

      Kooks 11404200

      CA Residents: WARNING: Cancer and Reproductive Harm -

      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

      Tech Specs

      Cat-Back Exhaust Specifications
      Piping Material:Stainless Steel Tip Material :Polished 304 Stainless Steel
      Piping Size:3"Tip Size:4"
      Muffler Type:Race MufflerFitment:2011-2014 GT and BOSS
      2011-2012 GT500

      Customer Reviews (13)

      Write a Review

      Ratings Summary

      4.6 out of 5 overall rating from 13 customers

      Installation Time: Afternoon

      • July 29, 2019

        3 2014 GT - CASPL50

        too loud

        Way too loud. Sound is good and deep but really roars.

        Helpful (0)
      • April 10, 2019

        4 2014 GT - Jay Installation Time: Afternoon

        Kooks Performance Cat-Back Exhaust

        Minor fitment issues, some due to being dropped on ends of both exhaust pipes. Right side pipe that connects to Kooks "H" pipe had to be trimmed 1/2" to get tips and hangers lined up correctly. Other than that install was easy and it sounds much better with no drone. I'm happy enough.

        Helpful (0)
      • December 10, 2018

        5 2014 GT - DavidO Installation Time: Afternoon

        Superior quality and smooth sound.

        Nice stainless finish with beautiful double wall tips provide a smooth aggressive sound that doesn't drone on the highway, but yet still provides a little bark to the bite of your 2011-2014 Mustang GT.

        Helpful (4)
      • September 04, 2018

        5 2014 GT - CokeMustang Installation Time: Afternoon

        Mild Growl

        I recently had the flowmaster outlaw axelbacks on and wanted an exhaust that wouldn’t drone but could still be heard. The Kooks Catback Exhaust does this perfectly. No drone, louder than stock but not nearly as loud as the flowmasters. The exhaust doesn’t backfire nearly as much now but that really made no difference to me. The construction and fitment of the system was spot on and went on with no issues. Would highly recommend this kit for someone who wants a clean, loud, non droning exhaust for their mustang.

        Helpful (4)
      • June 16, 2017

        5 2014 GT - Bacon Installation Time: Afternoon

        Amazing sound that is not overwhelming

        Fantastic quality and fit. The mufflers are straight through and the tubing has zero hard bends or kinks. Went on in about two hours using jackstands but i did need to cut the stock exhaust to get it out, If you have access to a lift it should drop out no problem. The sound is amazing, no drone, no rasp just a deep throaty tone that hits hard when you lay on the throttle. It is loud enough that you know its custom but not so loud that I would feel bad driving in my neigborhood at night.

        Helpful (8)
      • April 18, 2017

        5 2013 GT - AndrewT Installation Time: Afternoon

        Kooks Cat Back

        Great quality product and excellent sound. Installation was very straight forward and easy to do

        Helpful (8)
      • August 12, 2016

        5 2012 GT - Andy

        Sweet sound without drone or bark

        My wife and I set out to find the perfect set of pipes for our convertible . "Perfect" to us was the sound of a custom Saleen setup with those nice notes and tones, no rasp, no ping, none of that rice burner buzz... BUT - we wanted a little bit more aggressive growl down low in the RPM's with solid rumble as you open the car up. Zero drone was required when the top was down. We thought stock was "ok" we just wanted to turn stock up a few notches. These pipes have it all! At idle they sound like a V8 - deep melodic rumbling... without barking - there's nothing obnoxious about them. Stop on the accelerator and you KNOW you have a custom set on - loud but nowhere near racing style... Like, you can put mom in the car and she won't complain about the noise... Deceleration was an added bonus - no pops or cracks in back - instead you get a super cool musical gurgle - it really is cool. At highway cruising speeds of 50-60 the sound is gone - as quiet as stock with the top down. If you are looking for a really sweet sound that focuses on tone and melody and not on decibels and rasp - this is a no brainer upgrade over stock. (Next to an expensive factory "tuned exhaust" option on a new 2016 Camaro or a factory "tuned exhaust" option on a 2015 Stingray - this is much deeper sounding and more musical in the resonance tones / notes... making the Chevy guys look and feel so sad)

        Helpful (9)
      • May 02, 2016

        4 2012 GT - Jacob Installation Time: Less than 1 Hour

        Fitment issue but very nice

        Very nice looking system, I had an issue with the system fitting together and had to take the over axle pipe to a shop to stretch the opening for it to fit the other supplied kooks pipe (mid pipe to over axle pipe). Otherwise it looks fantastic and sounds super aggressive, much louder than I was expecting but very very nice. No drone at highway speeds which is great.

        Helpful (8)
      • September 02, 2015

        4 2014 GT - Jamestamu Installation Time: Afternoon

        American Muscle Made it right

        I had a shop install my exhaust and it took them a little bit longer since the exhaust came defective from Kooks. They had to open the pipe connections to allow for them to fit up. I called American Muscle and explained the problem and they paid the extra costs the shop charged me to complete the job. This is why I continue to buy from these guys as they make it right. As for the exhaust it looks amazing and sounds great. I wanted something that made the car come alive when WOT and not make it annoying to drive daily. This is the perfect exhaust and I would advise anyone to purchase these.

        Helpful (12)
      • May 24, 2015

        5 2014 GT - SgValor Installation Time: Less than 1 Hour

        WOW! More than I could have ever asked for

        I noticed no one has really given a detailed review on these yet so I'm going to give a pretty lengthy one. First install: install is pretty straight forward if you are doing it yourself. It took me about an hour but I had a lift to put it on for the install. They fit as well if not better than the factory exhausts to it's a simple bolt on install. Quality: these exhausts seem to be a very high quality product that will last a LONG time. I just got mine so I can't really speak to it yet. Performance: When taking the factory exhausts off and swapping to these, you can tell that they are significantly lighter weight which is great. Also the piping has less "kinks" / is smoother than factory allowing air to flow less restricted. I did feel a small performance gain after install. Sound: to me, these are the PERFECT exhausts in tone and volume! They have a very deep classic muscle car tone, they don't get that obnoxious raspy note. Volume is significantly louder than stock but is not overbearing when driving and there is 0 drone on the highway. So you can enjoy the new sound when accelerating but don't have a mindnumbing noise the whole time you're cruising. I highly recommend this product, I don't think I could be happier with my purchase.

        Helpful (11)

      Questions & Answers (8 answers)

      5 Top Rated Questions

      Does the Kooks cat-back system eliminate the factory catalytic converters?

      • The Kooks Performance Cat-Back Exhaust installs after the factory mid pipe and catalytic converters, and would have no effect on these components.

      Helpful (1)

      I have kooks longtime headers with the kooks xpipe. Will this bolt directly up to this?

      does this system have drone issues when going cat delete.

      • From my understanding, you should not experience any issues with drone. If there is drone, it will be minimal.

      Helpful (0)

      Will this exhaust work with the BBK after cat X-Pipe?

      • This will work with the after cat X-pipe from BBK yes.

      Helpful (0)

      I have an Stainless Work X pipe that is 3 inch on the exit, with this kit fit into that? I guess in other words is this 3 inch all the way back to the mid pipe?

      • Yes, this cat-back will work with that aftermarket midpipe.

      Helpful (0)
      Post Your Question
      3 More Questions
      Can I add another component to this system to eliminate the cats? I'm looking for a system that is from the OEM headers and back. If there is a product that works, can I get that separately or does it all need to be purchased and installed at the same time? 1 answer
      What is the total weight savings over the stock catback exhaust system? 1 answer
      How is the fitment of the over axle pipes on lowered cars? 1 answer

      Will It Fit My Mustang

      • Boss 302 - 12, 13
      • GT - 11, 12, 13, 14
      • GT500 - 11, 12

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