Steeda Mustang GT 3" Cat-Back Exhaust System - 304 Stainless (2018-2022)

2 Review(s)
$225.00 (15%)
Steeda's 555-3622 2018+ Mustang Cat-Back Exhaust System is constructed from 3-inch 304-stainless steel to provide corrosion resistance, more potential, a tough sound, and more power!

Part Number: 555 3622
Write a Review


Steeda's 3" diameter Cat-Back Exhaust System for the 2018+ Ford Mustang GT gives your S550 a deep, tough, and powerful sound. This system is designed to fit to your stock system and fits most long tube headers. Bring out the performance of your American-made muscle car with this deep exhaust. Our cat-back exhaust design provides maximum horsepower due to the oversized 3" tubing diameter, the best flow, and excellent sound without any annoying drone.

Quality construction. This Steeda S550 Cat-Back Exhaust System is constructed from 304-stainless steel for better than OE equivalent corrosion resistance. The quad tips of our Steeda 3" cat-back exhaust are constructed from polished 304-stainless steel for a timeless look.

Easy installation. Installing this Cat-Back Exhaust takes only 2-3 hours using common hand tools. It can be completed at home with ease and is the perfect way to upgrade your Mustang.

Better exhaust flow. If you demand more power and potential, this exhaust delivers. The 3" diameter flows adequately whether you have a few add-ons or a full-blown power adder! Our exhaust kit includes necked-down adaptors for a factory-style connection to OE converters. You can be confident that this exhaust will not restrict your Mustang and hold you back from making more power.

Note: Fits fastback coupe only, will not fit convertible models.

Product Benefits:
  • Adds deep muscle car tone
  • Great daily driving volume with no drone
  • 304 stainless construction provides OE or better corrosion resistance
  • Maximum horsepower with simple bolts ons as well as full-on power adders
  • Compatible with most long tube headers
  • 4" diameter quad chrome tips

CA Residents: Cancer and Reproductive Harm WARNING

Today, we're going to be installing the Steeda 3 inch Stainless Steel Cat-Back on this Performance Package 2 Mustang. We're going to show you some before and after sound clips as well as before and after dyno pulls showing you how much power you're going to gain from adding this kit on your S550 Mustang, as well as a step by step installation. So check it out. Here we have the Steeda three inch, 304 stainless steel cat back exhaust fitting your 2018 plus Mustang GT without active exhaust. This is an awesome kit if you're looking to take your 2018 plus Mustang to an entirely new level when it comes to exhaust note. The 304 stainless steel construction is bar none. Some of the best exhaust that I've seen. you can't go wrong with the four inch quad chrome tips. It's a direct fit replacement for your factory exhaust, meaning that when you pull off your factory cat back on your S550 Mustang, this goes right in its place. No cutting required. It's an easy installation with that three inch mandrel bend. You can expect higher horsepower increases. Hint, hint. We will be throwing this on the dyno before and after to see what kind of power increases this exhaust will give your Mustang GT. Additionally, this cat back exhaust does come with an x pipe along with these adapters that allow you to connect a factory connection to your head pipes. But if you have long tube headers and you want that three inch all the way back, you can pop these adapters off, connect it up to your long tubes and you're ready to roll Because this is a three inch cat back it won't fit convertible models because of that additional bracing that convertibles have, but a good replacement if you do want to run this three inch exhaust on your convertible is the Steeda IRS Braces.Well, without further ado, let's get this three inch stainless steel cat back exhaust installed in this performance package two behind me Not going to lie. This is one of my favorite cat backs for the S550 Mustang. I just can't wait any more. 20 horsepower increase over stock. Absolutely blown away with those numbers. 13 lb feet of torque as well those are super stout numbers for just a cat back with no tune change or anything like that installation really wasn't too bad at all. You can expect, just like any other cat back exhaust for an S550 Mustang. Super easy, you pull off the factory system. You throw on the Steeda system and you're ready to roll, not only in terms of power but also sound kind of checks all the boxes comment below. Let us know what you think if you want to see any other cool videos on anything Ford and Mustang related. Hit us up at for all of your Mustang parts. Ford Performance Explorer, F 150, you name it. Hit that like and subscribe button the notification bell. And don't forget the most important thing, Speed Matters.
View Full Transcript

Fitment & Features


Manufacturer: Steeda Autosports

Installation Information:

Level of Difficulty: Medium
Install Time: About 2 Hours
Tools Required: Basic Shop Tools, Jack, Jack stands, Safety glasses, Gloves
Print Instructions:

Vehicle Fitment:

Fits Model Year: 2018, 2019, 2020, 2021, 2022

Customer Reviews

Rating Snapshot

Select a row below to filter reviews.

Average Customer Ratings


GT Cat-Back Exhaust
I was searching for a 3" cat-back that was not excessively loud or raspy. I was sent a video of this system so I checked into it and asked the Steeda staff some questions about loudness and drone. I decided to give it a try and I'm glad I did as this system has met and exceeded my expectations. The system came well packaged and was easy to install. It isn't excessively loud (happy neighbors) but it is deep and opens up nicely when you get on the gas (happy me).
Did you find this helpful? 
Quality Cat-Back Great Price
The exhaust came packaged well and install was easy just using jack stands. Has a nice deep rumble without being obnoxiously loud which is exactly what I wanted. No drone when cruising on the highway. This can’t be beaten at its price. Great job Steeda.
Did you find this helpful?  4 of 4 Found Helpful
There are no reviews for this product!

Related Items

123123 - 50
Back to TOP
0 Items