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Ford Performance Active Cat-Back Exhaust w/ GT350 Lower Valance (15-17 GT Premium)

Market Price $2,999.99 You Save 6% ($179.99)
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$2,820.00 (each)

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  • Item 398089

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    Features & Details

    • Aggressive Loud Tone
    • Increased Torque and Horsepower Through Enhanced Exhaust Flow
    • Straight Through Free-Flowing Design
    • Connects to Stock Catalytic Converters
    • Durable 2.5 Mandrel Bent Stainless Steel Tubing
    • 4” Chrome Stainless Steel Tips
    • Comes with X Pipe Assembly
    • Fits 2015-2017 GT Mustangs with Premium Package Rear Bumper
    Superior Exhaust Upgrade. Unleash the beast in your GT Premium by installing the Ford Performance Active Cat-Back Exhaust. It provides more efficient exhaust flow, compared to the stock system, resulting in higher torque and rear horsepower, as well as a deep aggressive sound that adds muscle to your GT Premium.

    Improved Power and Performance. Featuring a high-flow X pipe and a straight through, free-flowing design, the Ford Performance Active Cat-Back Exhaust sets itself apart from other aftermarket exhaust upgrades. It delivers improved performance, and a unique tone on the track, street and drag strip.

    Quality Stainless Construction. The Ford Performance Active Cat Back Exhaust is made from extremely smooth 2.5” diameter mandrel bent T-304 stainless steel to boost exhaust flow. It comes with an X pipe and straight through mufflers to deliver a smooth and clear, yet deep sound. You will be excited to note that the design reuses the exhaust tips at the rear valance.

    Shelby GT350 Styling. The GT Mustang is already one of the best looking cars on the road today, how could it look any better? By installing a Shelby GT350 Rear Valance, that's how. This Ford Performance Active Exhaust Cat-Back Kit includes the same exact Rear Lower Valance with integrated Quad Exhaust Tips that comes as standard equipment on the Shelby GT350. Installation of the rear valance will require removal and trimming of the rear premium bumper cover.

    Application. The Ford Performance Active Cat-Back Exhaust with a GT350 Rear Valance is specifically designed to be used on the 2015-2017 GT Mustangs equipped with the factory Premium Chassis Package (Trim Levels: 400A/401A) for both great looks and great sound.

    Fitment: 2015 2016 2017 Details

    MPN# M-5200-M8

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) X-Pipe
    • (1) Driver Side Muffler Assembly
    • (1) Passenger Side Muffler Assembly
    • (1) Driver Side Over Axle Pipe
    • (1) Passenger Side Over Axle Pipe
    • (4) Band Clamps
    Installation Info
    Tech Specs
    Will it fit my Mustang?

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    Questions & Answers (15)

    5 Top Rated Questions

    What are the HP gains from this exhaust compared to stock? Thanks

    • The Ford Performance Active Cat-Back Exhaust w/ GT350 Lower Valance will not really give you any more horsepower over the stock exhaust, maybe 2-3 more horses. Cat-back and axle-back exhaust would be more for sound and not performance. You will want to look at the long tube headers for performance.

    Helpful (2)

    Are these as loud as corsa sport or borla ataks?

    • From my understanding, this exhaust will be more comparable to the Corsa Sports in terms of how loud the exhaust is. In my opinion the Borla Atak is louder than the Corsa Sports.

    Helpful (1)

    Are there any plans for making a video of this exhaust system for how it sounds and is installed??

    • At this time there are no plans on adding a video for the Ford Performance Active Cat-Back Exhaust w/ GT350 Lower Valance (15-17 GT Premium). With that being said, we are constantly working to get product videos containing installation help and descriptions up for all the many items we do have in our inventory.

    Helpful (1)

    Is there any drone noise with this exhaust system?

    will this system fit my current Stainless Power headers? I understand i will need a 3" to 2 1/2" pipe adapter.

    • As long as you get thestep-down adapter pipe yes this will work. 

    Helpful (0)
    Post Your Question
    10 More Questions
    How much quieter is this than the corsa Xtreme cat back? 1 answer
    i have got ford borla sport cat back with gt 350 rear valance which is similar to this , is there is a way to buy just the key that closes and opens the valves 1 answer
    Hello, I already have Roush Rear Valance on my 2016 Mustang GT. Now I'm thinking about changing it out for this one. Will there be an issue if with the replacement? Thank you 1 answer
    Is this exhaust california legal? 1 answer
    I bought this and had it installed, the volume and tone is insane, it is definitely as loud as a GT350 stock exhaust. I know the GT350 is designed to always quiet start(valves closed), I was wondering if there's any information regarding this product having the same function? Because mine seems to be backwards, I am unable to start the vehicle in quiet mode as the valves automatically open when the car is started every time, making it loud and defeating the purpose of my purchase. If you guys don't know, who would I contact? Ford performance? Borla? 1 answer
    is it adjustable? what are those attachement in the second picture? 1 answer
    Is this system (mufflers and x pipe) not the same as the Ford Performance by Borla sport or touring systems? Do you know how it compares (volume, tone, etc)? 1 answer
    For people that already bought the Ford Performance cat-back exhaust w/gt350 valance, are they gonna sell a upgrade with just mufflers and the active exhaust switch, kinda sucks to force to buy the complete system all over again 1 answer
    is this just as loud as the actuall gt 350 1 answer
    Why is this called an ACTIVE exhaust? Is it user adjustable? 1 answer

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    Customer Reviews (3) Write a Review

    Overall Rating 4.7

    out of 5 stars

    Installation Time:Full Day

    • Loudness / Volume 5 5
    • Exhaust Note 5 5
    • Fit & Finish 4.666667 4.7
    • Bang For Your Buck 4.666667 4.7

    • 4/5

      Installation Time: Afternoon

      September 25, 2018


      If you're looking for Active Cat-Back consider this Active Cat-Back Exhaust w/ GT350 Lower Valance (15-17 GT Premium). Install went well, the only issue I had was fitment at existing cats to new X-Pipe. My existing OD at Cats was 2.25 and the Kit X-Pipe was 2.20 OD. The fix was easy, visited my local exhaust shop and had them stretch the Kit X-Pipe to 2.25 OD. The quiet selection is a bit louder than stock, but just what I was hoping for. The loud selection and new rear valance is the reason I picked this set-up. The sound videos just don't do justice. You won't be disappointed, it progressively cracks faster and louder on the way to WOT and pops and crackles on deceleration. Fat deep sound from Borla. I'm happy with it!


      Year: 2016 Submodel: GT

      Helpful (6)

    • 5/5

      Installation Time: Full Day

      March 10, 2018

      Looks and sounds amazing

      Completely changes the look of the rear end of the car. Quiet mode is a bit louder than stock, but has a much deeper growl with zero drone at highway speeds. With the butterfly valve open, the volume is increased dramatically and an even deeper note without the rasp of other active systems I've heard. There is quite a bit of drone at highways speeds, but shutting the valve obviously solves the problem. It's a pricy system, and a dealership install was more than I anticipated, but the end result is fantastic. I enjoy having the option of changing the volume and tone on demand. As a side note, be careful of the placement of the electronics. Water caused the unit to malfunction. so it needed to be reinstalled in the trunk.


      Year: 2017 Submodel: GT

      Helpful (9)

    • 5/5

      Installation Time: Full Day

      November 03, 2017

      So aggresive sound!!

      If u want to be a little bit quiet, switch off. Want to be angry? Switch on!!! Not too hard to install, but it takes time about 5hours.


      Year: 2017 Submodel: GT

      Helpful (21)

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