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Stainless Works 3-Inch Retro Chambered Cat-Back Exhaust with H-Pipe (15-17 GT Fastback)

Item 384842
AmericanMuscle no longer carries the Stainless Works 3-Inch Retro Chambered Cat-Back Exhaust with H-Pipe (15-17 GT Fastback). Please check out 2015-2021 Mustang Cat-Back Exhaust for an updated selection.
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    Video Review & Installation

    Hey, everybody. I'm Justin with, and this is my breakdown of the Stainless Works Retro Chambered Catback Exhaust System with H-Pipe, available for your 2015 Mustang GT. If you guys are looking for a high quality, perfect fitting catback system that will give your Mustang that old school muscle car rumble, well, then you have to check out the Stainless Works Retro Chambered three-inch system for your S550. Now, as you've just heard, this system will give your Coyote-powered GT that old school throwback Mustang sound that was big with the hot rods back in the day.That deep rumble is a combination of the included H-pipe here, along with Stainless Works' unique retro chambered mufflers. Now, these things are unique in the fact that they do offer a straight-through design along with that straight-through performance, but they do have enough baffling that's gonna keep any excessive rasp to a minimum, that can sometimes come along with having a straight-through muffler. Now, because of this, you can expect a relatively tame tone while cruising around, but these things really do come to life when you get into it. And the best part is absolutely zero drone while on the highway. All right, guys, as for the construction, we're looking at 3-inch mandrel bent tubing, all of it which has been made from 304-grade stainless steel, including these 4-inch mirror polished conical wall tips. We would like to point out since you are ditching that heavy factory exhaust and suitcase style resonator and switching to a full stainless system here, you're gonna be shaving roughly 20 pounds off the car, which is never a bad thing. Another big thing I wanna point out here is that this particular catback that I have in this video is designed to work specifically with 2015 Mustang GTs that still have the factory manifolds or factory headers in place. Now, if you guys are looking to do long tubes down the road or maybe at the time of the purchase of the exhaust, then you should definitely check out the Stainless Works option with the performance connect, meaning it's designed to work specifically with those Stainless Works long tube headers. When it comes time to get dirty, guys, you wanna leave yourself about two hours to get this catback installed from Stainless Works. I will say that doing the exhaust systems on the 2015s have been made a lot easier, thanks to the addition of the independent rear suspension. But either way, give yourself a couple of hours, grab an extra set of hands if you can, and make sure you have a good set of quality tools before you get started. As always, if you have any questions about this particular system here or about the install itself, feel free to reach out to a Mustang expert any time. So if you're looking for a well-built, great sounding system, and really prefer that old school muscle car rumble. Well, then you guys are gonna have to check out the Retro Chambered Catback Exhaust System from Stainless Works, available right here at

    Product Information

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


    • Aggressive Muscle Car Exhaust Note
    • Retro Styled 2.5" Core Chambered Mufflers
    • 3" Diameter 304 Stainless Steel Tubing (Steps Up from 2.5")
    • Mirror Polished 304 Stainless Steel Tips
    • Includes H-Pipe and Two Chambered Resonator Tips
    • Direct Fit Replacement Upgrade
    • 22 lbs. Lighter Than the Stock Cat-Back System
    • Designed and Manufactured in the USA
    • Fits 2015-2017 GT Fastback Mustangs with Factory Manifolds


    Aggressive Exhaust Note. Add the loud aggressive exhaust note of a classic 60's muscle car to your coyote powered S550 GT 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.

    Direct Fit Upgrade. This Stainless Works Mustang Cat-Back with H-Pipe includes all the hangers and clamps needed to bolt straight up to the OEM factory location without any modifications required, making it a direct fit, bolt-on replacement upgrade.

    Application. This Stainless Works Retro Chambered Cat-Back with H-Pipe is specifically designed to fit the 2015-2017 GT Fastback Mustang with the factory exhaust manifolds installed. Not compatible with convertibles.


    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) H-Pipe Assembly
    • (1) Right Intermediate Pipe
    • (1) Left Intermediate Pipe

    Tech Specs

    Cat-Back Exhaust Specifications
    Piping Material:304 Stainless Steel Tip Material :Mirror Polished 304 Stainless Steel
    Piping Size:3" (steps up from 2.5")Tip Size:4"
    Muffler Type:Retro Chambered 2.5" CoreFitment:2015-2017 GT Fastback

    Customer Reviews (44)

      Reviews of Stainless Works Exhaust products have an average rating of 4.8 out of 5

        Questions & Answers

        10 More Questions

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