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Pypes X-Bomb Cat-Back Exhaust with Polished Tips (18-21 GT w/o Active Exhaust)

Item 405697
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Market Price $824.99 You Save 12% ($95.31)
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$729.68 (kit)

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      Video Review & Installation

      Justin: The Pypes X-Bomb Cat-Back that we're talking about here today guys is currently the most affordable full stainless cat-back of its kind that's also gonna deliver ear piercing tone thanks to the combination of X-pipe and mid muffler design. The materials will be a combination of 304 and 409 grade stainless throughout and the tips here will be shown in the traditional polished finish for right around 700 bucks. Now since cat-back installs on the S550 are a walk in the park, expect a relatively easy day in the garage. However, since you do have to get underneath the car, the site is automatically gonna kick this one up to the softest two out of three wrenches on the difficulty meter here and about an hour or so to complete from start to finish. But if you hang until the end of the video, we'll be sure to show you how it's done. So, in my opinion, the X-Bomb here along with the corresponding H-Bomb also from Pypes will be the best bang for your buck systems currently available here on the site for nonactive 2018 and newer GTs. Now the combination of the full stainless billed along with a huge increase in volume will no doubt make this a popular choice for just about anyone out there looking to give their S550 ton of bark. Just how much bark? Well, as you guys heard with our sound clips at the very top of this video, the X-Bomb will certainly deliver in that department. In fact, I'm willing to go full pull five out of five on my trusty wake the neighbor scale here as this thing and it's very aggressive design, is sure to turn more than a few heads and maybe get some angry looks from unsuspecting or unapproving pedestrians. Now, unfortunately, it's hard to go this loud on the outside without carrying some of that noise into the interior, that is of course unless you fork out big dough for a Corsa or Borla. So with that in mind, just expect the smallest amount of interior drone while cruising on the highway. And I will say it's not nearly as bad as the Pypes H-Bomb system with the lower frequency that that system achieves through the different mid-pipe design. Now that loud raspy growl is made possible thanks to the X-pipe design which we've already pointed out but also due to the twin mid-mounted bullet-style mufflers. Now I use that term muffler very loosely here because as you can see guys, these things are more of a resonator than anything else but that's what you will be receiving here with this particular system. But what do you say we move away from the sound and briefly talk about the construction and materials with the Pypes system and again a big plus at this price point is going to be the inclusion of that full stainless steel build, 409 grade here will be the main or predominant material with a little 304 splashed in for good measure with those tips. And because of this full stainless design, Pypes is gonna back each system with a limited lifetime warranty. Now speaking of those tips guys, again, 3-inch double walled, full stainless in the more traditional polished finish but quick heads up, you can also get this on the site with a black tip instead for a few bucks more if you're interested. Now piping will all be 3-inch mandrel bent. And finally, guys, the system will connect to the factory manifolds or mid-pipe I should say along with select aftermarket full 3-inch options thanks to the included adapters and that's something you don't always see in the aftermarket exhaust category. But let's get into the install as promised. And again, very simple stuff here guys. In fact, to give you a better idea of just how easy this one will be, here is that detailed walkthrough along with a quick tool breakdown. Woman: For this install, we use a 3/8 drive impact gun, a deep 15-millimeter socket, a deep 13-millimeter socket, a shallow 13-millimeter, a small extension, a power ratchet, and a rubber mallet. Okay, guys, so we're gonna drop our cat-back as one big piece. We're gonna start up in the front and then work our way towards the back. The first thing that we're gonna do is we're gonna loosen these clamps here. Now you'll need a 15-millimeter socket for that. We're gonna go ahead and loosen all four of these nuts here. Now I'm just double checking and make sure that the clamps popped free, if they didn't, you guys can always take a flat head screwdriver right here and just pry them apart a little bit. The next thing that we're gonna do is unbolt our two sets of hangers. Now you guys have two hangers back here behind the rear diff and there are also two hangars over top of rear mufflers, you'll need a 13-millimeter socket for that. What we're gonna do is we are going to remove the bolts but we're gonna leave the hangers clipped into the frame here and that's gonna hold our exhaust up until we're ready to remove it. All right, now we'll remove the bolts back here by the muffler. Then we'll do the same thing for the other side. All right, guys. So at this point, you're ready to drop your cat-back as one big piece. Now it's going to make things a lot easier for you if you have a second set of hands. I have Andrew here, he's gonna help me drop the cat-back down. And what we're gonna do is we're gonna unclip the hangers from the body of the car and once that's done we're going to push backwards on the resonator and then it will drop free from the car. So with our factory cat-back off the car, we can take a quick second and compare it to our Pypes cat-back. So the Pypes cat-back is a 3-inch cat-back made of stainless steel. Now because this is a 3-inch cat-back and we're gonna be bolting up to our factory connection pipes, we are gonna be using the adapters that Pypes includes. If you guys are bolting up to your factory connection pipes you'll be using the adapters as well. And going with a stainless steel exhaust is always gonna be your best bet if you're looking for a long life out of the product and you want the most corrosion resistance. The other thing that I'm gonna point out with the Pypes System here is that this is an X-pipe and typically speaking an X-pipe setup is gonna give you more volume in a lot more sound. The other thing I'm gonna point out here is that Pypes includes a mid-muffler type of setup with a resonator-style bullet muffler here. You guys can see there are no more traditional mufflers and that these mufflers look a lot different than your factory mufflers do. These are straight through mufflers and they're gonna give you a ton of sound and a lot of volume and also some raspy notes too. Lastly, the system is gonna end in 4-inch polished stainless steel tips. Real quick before we get the system installed in the car, we're gonna go ahead and grab our hangers off of our factory cat-back and put them on the Pypes. All right, so we're gonna remove these hangers. If you guys have a hard time getting yours off, you can always use some WD-40 or PB B'laster. And we'll get them installed on the Pypes system and then grab our other set of hangers. All right, so now we're going to install our adapters into our factory clamps here on our connection pipe. So I'm just going to slide these into place and I am gonna tighten these clamps down right now too, so you'll need a 15-millimeter socket for that. Next, we're gonna install our mid-pipe. So I do have two clamps in place already on the mid-pipe, you're gonna want to make sure that you have clamps on any pipes before you connect them. The X-pipe does have a support bar at the back, you want to make sure that's support bar is pointed towards the ground. You don't want to have it oriented, so it's pointing up towards the bottom of the car but towards the ground instead. And I do have a pole jack here that's gonna help me get my mid-pipe in place, so what I'm gonna do is I'm gonna slide over the adapters here and then I'll use the pole jack to help hold up the mid-pipe. All right, so once again, we have a clamp in place, now we're going to grab our next pipe, we'll slide that into the end of our mid-pipe. Then we'll go ahead and make sure we get our hanger clipped into the body of the car that's gonna help us keep this in place. And then I'm also going to hand start the bolts in this hanger because that's gonna make sure that this won't pop out of place and it'll keep everything loose enough so that I can adjust it but just hold it in place for me. All right, so now we're going to attach our next pipe. Once again, make sure you guys have a clamp ready. Slide this into place and then we will grab our tip setup. All right, so we'll get a clamp in place, then we'll get our tip assembly installed. All right, the next thing we're going to do is get our hanger clipped into the body of the car here and then hand start the hardware. All right, so we're gonna do the same thing for the other side. We'll go ahead, get a clamp on the end of our mid-pipe, slide the pipe into the place, get our hanger lined up and clipped into the body. We'll hand start our bolt here and then move on to the next pipe. All right, so once again, make sure you guys have a clamp in place and then we'll grab our tip assembly. As usual, we'll clip our hanger into the body here, get it lined up so that we can hand start some bolts. And now we can grab our exhaust tips. All right, guys. Now we can go ahead and get our tips installed. For this, you will need a 15-millimeter socket. Gonna want to make sure they're straight and go ahead and tighten them down. All right, now we'll get our other tip installed, make sure that's straight and then tighten that down as well. All right, so we'll do the same thing on the other side. We'll get our tip in place, make sure it's straight, and then tighten it down. All right, guys. Now we're gonna go through, make sure our system is as straight as possible and we're gonna tighten our clamps. We'll work from the front of the car to the back, and I have a 15-millimeter socket for our clamps. All right, the last thing we'll do is tighten down our hanger bolts. All right, guys, that's gonna wrap up this review and install. Keep in mind, you can always check this cat-back out more online right here at

      Product Information

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


      • Aggressive Tone and Volume with No Drone
      • Improves Horsepower and Torque
      • Comes with High-Flow Mid-Mufflers
      • X-Bomb Mid-Pipe Provides Low Rumble
      • Mandrel-Bent 3-Inch 409 Stainless Steel Piping
      • Polished 3-Inch Quad Exhaust Tips
      • Direct Fit Replacement Upgrade
      • Limited Lifetime Warranty
      • Fits 2018-2021 Ford Mustang GT Models without Active Exhaust


      Aggressive Tone and Volume. The Pypes X-Bomb Cat-Back Exhaust with Polished Quad Tips is designed to turn heads. The aggressive tone and quad tip design will set your Mustang apart from the others. Additionally, the X-pipe adds a rasp to the tone while the mid-mufflers eliminate drone while you are cruising on the highway.

      Increased Power and Performance. The Pypes X-Bomb Cat-Back Exhaust is specially designed to improve performance, especially for track applications. The free-flowing design improves exhaust flow for increased horsepower and torque. Additionally, the mid-mufflers are designed to improve scavenging by drastically reducing backpressure.

      Superior Stainless Steel Construction. The X-Bomb Cat-Back Exhaust is made from mandrel-bent 409 stainless steel tubes that give it outstanding strength and durability. Additionally, the polished stainless steel tips provide an upgrade to the Mustang's appearance. Furthermore, the all stainless steel construction gives the cat-back exhaust excellent protection against rust and corrosion for long-lasting service.

      Direct Fit Bolt-On. The X-Bomb Cat-Back Exhaust is designed for an easy installation and comes with factory-style hangers. It can be installed with common garage tools and with the direct fit design, installation is hassle-free.

      Limited Lifetime Warranty. Backed by a Limited Lifetime Warranty. Pypes Performance Exhaust warrants their products to be free from manufacturer's defects due to workmanship and material. The warranty applies only to the original purchaser which purchased the product. The limited lifetime warranty will not be transferrable. Some limitations may apply.

      Application. The Pypes X-Bomb Cat-Back Exhaust with Polished Tips is designed for 2018-2021 Ford Mustang GT models without active exhaust.

      Fitment: 2018 2019 2020 2021 Details

      Pypes SFM87MX

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Driver Side Assembly
      • (1) Passenger Side Assembly
      • (1) X-Pipe
      • Installation Hardware

      Customer Reviews (12)

        Reviews of Pypes Exhaust products have an average rating of 4.5 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

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