FREE 2 or 3-Day Delivery on 10,000+ Items. Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
$12k Summer Sweeps, 3 Chances to Win! Enter Now >

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

Item 384842
Call a Mustang Enthusiast at 1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Market Price $1,690.10 You Save 13% ($220.45)
Our Price


FREE Shipping

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    or use

    PayPal Button

      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.



      Stainless Works M15CB

      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 (89)

        Questions & Answers

        10 More Questions

        Will It Fit My Mustang

        • GT - 15, 16, 17

        Not compatible with Convertibles due to different bracing; This Cat-Back is for 15-17 GTs with factory manifolds only.

            Related Mustang Categories