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Kooks Cat-Back Exhaust with Y-Pipe and Black Tips (15-20 EcoBoost Fastback w/ Kooks Down Pipe)

Item 387104
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      Video Review & Installation

      Justin: What's up, guys? Justin with, Paul from the Bama performance team, we're down in North Carolina visiting our friends from Kooks Performance with their 2015 EcoBoost here. We were hanging out at their shop yesterday. They hooked us up with their 3 inch competition downpipe, full cat-back exhaust. I mean this thing sounds great. Laying down some really good numbers on the Dyno.Last time we showed you guys this car, it was making 283 horsepower, 342 pound-feet of torque. With the new parts installed, it's now making 308 and 379. That's a difference of 25 horsepower, 37 pound-feet of torque.We're here at the strip to test it out a little bit. Now, Paul, last time at the track, we went a best of 12.9. We're at an eighth mile track. It's all we can find down here. I mean can we still compare these numbers and see how the car's going to do?Paul: Yeah, we can see what the car's doing in the eighth mile, then really extrapolate the data from the back half of the track to get a rough idea of what's going on. Again, we're here to really test the parts. You do have that front mount intercooler on the car with the up pipe kit. A lot of it is going to be just collecting some data and going from there.It went into overboost mode. It's walking that fine line of how much boost do we want to make versus what our tolerance is within the computer to protect the motor.Male Voice: I'm going to try to manually shift it. It was shifting real short from first to second, so I'm going to manually shift this one and see what it does. Hopefully, if it'll hold boost, it'll haul ass.Justin: All right, Paul. The car made its first initial passes, did pretty well, then we let it cool down a little bit. You made some tweaks, and it went even faster.Paul: Yeah. Again, like I say all the time, I love going back and looking at the data. I made a couple of tune adjustments really focusing on the shift points, again also for the downpipe and picked up almost another tenth going 7.90s. The car ended up going 7.71 at 89 miles an hour. Obviously, we were able to use that E.T. and mile an hour, go to an online calculator, and punch it in. It turns out to about a 12.1 E.T. So, overall, extremely happy with the results.Justin: That is hauling you know what. I think even more impressive, guys, is the fact that this thing is cutting 1.50 sixty-foots basically stock suspension and a radial, right.Paul: Yeah, 1.59 60-foot on a 19 inch drag radial bone stock suspension out of a little turbo 4 banger. That's really impressive.eJustin: Yeah, absolutely. We can not thank our friends over at Kooks enough. I mean they hooked us up with a killer 3 inch competition downpipe, the cat-back system. The car picked up over 25 wheel horsepower and over 30 pound-feet of torque, no tune adjustments whatsoever. That's just pretty much the parts doing what they're designed to do.Again, big shout out to our friends over at Kooks. We had a great time. Thanks for the hospitality. We've enjoyed this nice, sunny North Carolina weather, but now it's time to head home.Guys, keep an eye out for more EcoBoost videos coming your way very soon. Something tells me we are not done modding this car. Again, subscribe to your YouTube channel, American Muscle Videos, and for all things Mustang, keep it right here at

      Product Information

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


      • Aggressive Muscle Car Exhaust Note
      • Y-Pipe and Polished Oval Race Mufflers Included
      • 3" Diameter Mandrel-Bent Stainless Steel Tubing
      • 4" Black Stainless Steel Slash Cut Tips
      • Direct Fit Replacement Upgrade
      • Not Compatible with Active Exhaust
      • Fits 2015-2020 EcoBoost Fastback Mustangs w/ Kooks 3" Down Pipe


      Aggressive Exhaust Note. Upgrade the quiet exhaust on your EcoBoost powered S550 Fastback Mustang with a Kooks Cat-Back Exhaust System. Designed for use with a Kooks Performance Down Pipe, this 3" catback not only sounds great, but also improves exhaust flow with the help of the included Y-pipe for an increase in rear wheel horsepower and torque.

      Stainless Steel Construction. Constructed from mandrel bent 3" diameter 304 stainless steel tubing for strength and superior corrosion resistance, this Kooks Cat-Back Exhaust System features (2) polished oval race mufflers that end with 4" black finished 304 stainless steel slash cut exhaust tips.

      Direct Fit Upgrade. The Kooks Cat-Back Exhaust with Y-Pipe includes all the hangers and clamps necessary to bolt straight up to Kooks Performance Down Pipe without any extra modifications required, making it a direct fit, bolt-on replacement upgrade.

      Application. This Kooks 3" Cat-Back Exhaust with Y-Pipe and Black Tips is specifically designed to fit the 2015-2020 EcoBoost Fastback Mustangs with a Kooks 3" Down Pipe and Connection Pipe System installed. Does not fit convertible or Active Exhaust equipped models.

      Fitment: 2015 2016 2017 2018 2019 2020 Details

      Kooks 11534110

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Mid-pipe
      • (2) Connection Pipes
      • (2) Over-Axle Pipes
      • (2) Oval Race Mufflers
      • (2) Slash Cut Tips
      • (8) Clamps

      Tech Specs

      Cat-Back Exhaust Specifications
      Piping Material:Stainless Steel Tip Material :Black 304 Stainless Steel
      Piping Size:3"Tip Size:4"
      Muffler Type:Race MufflerFitment:2015-2017 EcoBoost Fastback

      Customer Reviews (1)

        Reviews of Kooks Exhaust products have an average rating of 4.8 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

          • EcoBoost - 15, 16, 17, 18, 19, 20

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