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Stainless Works 3 in. Retro Chambered Cat-Back Exhaust w/ H-Pipe (15-17 GT Fastback w/ Long Tube Headers)

Market Price $1,437.16 You Save 12% ($165.34)
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  • Item 384843

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Ship to: Ashburn - 20149
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    Features & Details

    • Aggressive Muscle Car Exhaust Note
    • Retro Styled 2.5" Core Chambered Mufflers
    • 3" Diameter 304 Stainless Steel Tubing
    • Mirror Polished 304 Stainless Steel Tips
    • Includes H-Pipe and Two Chambered Resonator Tips
    • 22 lbs. Lighter Than the Stock Cat-Back System
    • Requires Stainless Works Long Tube Headers Part# 384844 or 384845
    • Designed and Manufactured in the USA
    • Fits 2015-2017 GT Fastback Mustangs with Stainless Works Long Tube Headers
    Aggressive Exhaust Note. Add the loud aggressive exhaust note of a classic 60's muscle car to your coyote powered S550 GT Mustang Fastback with a Stainless Works 3" Retro Chambered Cat-Back Exhaust system. This catback not only sounds great, but also improves exhaust flow with the included H-Pipe for an increase in horsepower and torque.

    Muscle Car Rumble. The included H-Pipe not only helps increase power, but it also adds a deep muscle car rumble to the sound of your exhaust with its classic "H" crossover pipe design.

    Stainless Steel Construction. Constructed in the USA from mandrel bent 3" diameter 304 stainless steel tubing for strength and superior corrosion resistance, this Stainless Works Mustang Cat-Back exhaust system features two round retro chambered 2.5" core mufflers that end with mirror polished 304 stainless steel slant cut resonator exhaust tips.

    Lightweight. This Stainless Works Cat-Back exhaust system is 22 lbs. lighter than the factory Ford catback system, making it perfect for track and drag racers looking to shed unwanted weight in the pursuit of quicker times.

    Application. This Stainless Works Retro Chambered Cat-Back with H-Pipe is specifically designed to fit the 2015-2017 GT Fastback Mustangs equipped with the 32-valve DOHC coyote 5.0L V8 engine. Requires Stainless Works long tube headers part# 384844 or 384845. Not compatible with convertibles.

    Fitment: 2015 2016 2017 Details

    MPN# M15CB3

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Right Muffler Assembly
    • (1) Left Muffler Assembly
    • (1) H-Pipe Assembly
    • (1) Right Intermediate Pipe
    • (1) Left Intermediate Pipe
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material: 304 Stainless Steel Tip Material : Mirror Polished 304 Stainless Steel
    Piping Size: 3" Tip Size: 4"
    Muffler Type: Retro Chambered 2.5" Core Fitment: 2015-2017 GT Fastback w/ Long Tube Headers
    Will it fit my Mustang?

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          Customer Reviews (3) Write a Review

          Overall Rating 4.3

          out of 5 stars

          Installation Time:Afternoon

          • Loudness / Volume 4.333333 4.3
          • Exhaust Note 5 5
          • Fit & Finish 5 5
          • Bang For Your Buck 4.666667 4.7

          • 5/5

            August 31, 2017

            best sound

            I tried a few combinations. Borla atak was great until the headers went on,then crazy loud and very raspy. I added change,replaced them with short round flowmasters........still horrible. Now I have the sound that an 800 hp mustang should have.


            Year: 2015 Submodel: GT

            Helpful (11)

          • 3/5

            May 05, 2017

            Beautiful sound but beware the drone

            I installed these mufflers to replace H-Pipe and BBK Varitune because of the noticable drone at highway speeds in 6th gear. After a test drive the stainless works were actaully worse. The sound at city driving and below 65 mph (105 kph) is absolutely perfect. Once you hit highway speeds and drop it into 6th gear at 1600 to 1900 rpm the drone will make your head and teeth ache. I promptly uninstalled them. If you do not do alot of highway driving or long trips these are definately the ones you want. Gave it a 3 rating just because of the drone. If the drone was non existant or at a level that was tolerable these would be a 5 all the way.


            Year: 2015 Submodel: GT

            Helpful (12)

          • 5/5

            Installation Time: Afternoon

            March 21, 2017

            Incredible sound!!

            I paired these with Stainless Works long tube headers O/R (Item 390795-B). I installed the headers first with an X-pipe and stock mufflers and it sounded terrible (metallic rasp). After installing the new Stainless Works 3 in Retro Chambered Cat-Back I could not be happier. The total install was only about 2 hours on jack stands. The sound is very deep with a classic exhaust note and there is no rasp at all. This is honestly one of the best sounding Mustang exhausts that I have ever heard. **Note - This is exhaust is VERY loud. Probably on the upper end of what most people want on the street. It also has significant drone at about 2k rpm. If I set the cruise at about 85 mph (m6, 3.73) the drone is reduced a lot but still noticeable. For me the drone is worth the sound you are getting, but it is definitely a factor to note. The volume/drone might be more manageable with hi-flow cats but I have not had a chance to test it yet.


            Year: 2017 Submodel: GT

            Helpful (12)

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