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MBRP Pro-Series Axle-Back Exhaust (18-21 GT w/o Active Exhaust)

Item 403866
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      Video Review & Installation

      Justin: The MBRP Pro-Series Axle-back Exhaust System for the 2018 and newer GT will be a full stainless steel option that gonna be deliver a bunch of sound, but for not a whole lot of money. In fact, at the time of this video that mid to high $300 price point, is gonna make this one of the most affordable in the category while at the same time still boasting that 304-grade stainless steel build. Install will involve some cutting as is the case with any S550 axle-back. So, we're gonna nod just one up to a soft two out of three wrenches on the difficulty meter with a more detailed walk-through to come later in the video. Now, in my opinion, MBRP does a great job of making a wide variety of systems out there utilizing a few different materials that basically make them appeal to a wide variety of budgets. And while I will say that is gonna be a little bit more apparent in their cat-back lineup, they have a lot more to choose from there. The axle-back category still does have a few different flavors to choose from as well. Now, at first glance, it does become immediately apparent that this system will be a tad on the loud side. Why? Well, because there are no mufflers anywhere in sight. In fact, this kit does delete those factory mufflers and turn straight piping your factory exhaust system essentially from that resonator on back. The end result here, guys, is gonna be one of the most aggressive axle-back systems you can get and most aggressive tones that you can get without removing the cats or the factory suitcase style resonator. But let's not waste any more time with this system. Let's talk about the sound you can expect when bolting up the Pro-Series to your 2018 or newer GT. And again, things are pretty aggressive here with this axle-back installed as you would imagine, right? So, going to patented one to five or one to wake the neighbor scale. I have this system coming in at a rather strong four out of five. And because that factory resonator still is in place, the sound is gonna maintain a good profile. Meaning, it's not gonna be too raspy, it's not gonna be too distorted, and best of all the interior noise is surprisingly minimal overall. Now, MBRP, I would like to think helped me coin the phrase, "Bark for your buck." In this system, the Pro-Series really does embody that very well. On top of that killer tone, you're also getting some of the finest materials out there thanks to the 304-grade stainless steel throughout from tip to tip making this the calling card of the Pro-Series systems. Now, that will include the small amount of two and a half inch mandrel bent tubing here, finally, all exiting out of your quad tips, 4-inches in diameter and etched with that MBRP logo. And because you are working with that high-quality stainless steel build, MBRP does back this entire system, the Pro-Series here with their full lifetime warranty against any possible defects. With all that said, let's talk about the installation and as I mentioned earlier guys, there is a small amount of cutting involved here, but that really is the case with any S550 axle-back. It's notthat bad as long as you take the time, measure twice, cut once and you'll be good to go. But to give you a better idea of what's expected with this job, here is a detailed walk-through in addition to a tool breakdown. Man: First thing we're gonna do here is make a mark on our cat-back, that's gonna show us where we need to cut so we can remove the factory axle-backs. So, what we wanna do is find our muffler and then come down right after the bend. As soon as the bend stops and you have a section of straight pipe, that's where we wanna cut. I'm gonna go ahead and make a mark here. And we'll do the same thing on this side. You wanna find your bend. Right after the bend, you're gonna have a straight piece of pipe and we'll make our cut line right here. We're now ready to cut our factory axle-backs out of here. I got a metal cutting blade on my Sawzall. Let's go ahead and get this guy cut. So, I'm about halfway through the pipe here. I did throw a pole jack up in place here, so when I go all the way through this muffler doesn't come down and hit me on my head. All right. We've got our axle-back cut now. I'm gonna slide the stock muffler out of place and just spray the upper hanger with a little bit of WD-40. Should be able to just slide this right on out of our hanger. Next thing we're gonna do is clean up the cut end of the pipe that we just made. I'm gonna be using a die grinder with a carbide tip. If you guys don't have one of these, a round file or a piece of sandpaper will do just fine. We're now ready to install our axle-backs. First thing I'm gonna do is slide a clamp on the end of our pipe here. Next, I'm gonna slide our hanger up into our rubber isolator to get that started. And then, finally, we can come down here and make the connection. All right. So, I've got my clamp on the end of our pipe here. And again, I'm gonna slide them up into the hanger and come back and make the final connection. Next thing I'm gonna do is tighten our clamps up before we put our tips on. I have a 15-millimeter socket on my impact gun here. We're now ready to install our tips. Let's go ahead and slide one of these on here and I will using a 5/16 Allen wrench to get these tightened down. And we'll do the same thing on the other side now. That's gonna wrap up our review and install. Be sure to check out more at

      Product Information

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


      • Pro-Series Axle-Back Exhaust
      • 2.50-Inch Mandrel-Bent Tubing
      • T304 Stainless Steel Construction
      • 4 in. Quad Polished Dual Wall Tips
      • Aggressive Sound and Improved Styling
      • Axle-Back Design Provides Simple Bolt-on Install
      • Substantial Weight Savings over OEM Mufflers
      • Includes All Necessary Hardware
      • Improved Horsepower and Torque
      • Resistant to Corrosion and Rust
      • Limited Lifetime Warranty
      • Fits All 2018-2021 Ford GT Mustangs Without Active Exhaust


      High Impact. Are you looking for an exhaust system that will make a statement everywhere you go in your 2018-2021 Mustang GT? Then look no further than the MBRP Pro-Series Axle-Back Exhaust. You’ll get improved horsepower and torque with this stellar exhaust.

      Built to Perform. Resistant to corrosion and rust, the polished dual wall tips add flare and style. You will love the aggressive sound and the lightweight design that is a substantial weight savings over heavy OEM mufflers. Built to be a perfect fit for your GT, this exhaust fits convertible and fastback models as well. Crafted from T304 Stainless Steel, this exhaust features a 2.50-inch mandrel-bent tubing with 4-inch quad tips

      Installation. This intermediate install can be completed with basic hand tools, a hoist, or an extra set of hands in approximately 2 hours. For installation convenience, quality hardware and instructions are included.

      Warranty. A limited lifetime warranty covers this product if a defect or imperfection is found as a result of faulty manufacturing.

      Application. The MBRP Pro-Series Axle-Back Exhaust fits all 2018-2021 Ford GT Mustangs without active exhaust.



      MBRP S7211304

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Pro-Series Axle-Back Exhaust
      • Hardware
      • Installation Instructions

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