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Roush Extreme Performance Cat-Back Exhaust (05-09 Mustang GT, GT500)

Item 69110
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Ship to: Ashburn - 20149
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Total cost of service $299.00
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      Video Review & Installation

      Justin: If you want one of the loudest and most aggressive sounds out of your '05 to '09 GT or GT500 without touching the headers or the mid-pipe, well, then the ROUSH Extreme Performance Cat-Back here will certainly be the one for you. Now, the ROUSH Extreme will feature a muffler-deleting mid-resonator design to allow for basically all of the volume, along with a full stainless steel build all for right around that low $800 price point. Install's gonna be a 100% bolt-on job guys, but figure all of your work is done underneath the car, therefore, the site's gonna automatically kick things up to a two outta three wrenches on the difficulty meter. Maybe a couple of hours, so have your time to complete from start to finish. But as always, hang with me for a little bit, and we'll walk you through this job later in the video.All right, guys, so I've been doing this job for a lotta years now, and if there's one thing I've realized that ROUSH isn't, it's quiet. I say that because they make a number of systems for a number of different Mustangs, all of which are very aggressive and ultimately turn a lotta heads. Now, same can be said for the Extreme here without a doubt, right? Now, as the name implies, the ROUSH is gonna use the more is better approach with the Extreme and give it a ton of volume by eliminating all mufflers from the equation, and basically, only giving this system the two mid-mounted resonators here to basically help shape the sound a little bit more and then maybe take a little bit of the edge off.Now, what does this mean for my wake the neighbor scale? Well, get ready to become the most-hated person in your neighborhood, because I've got the Extreme coming in at a very strong full-blown five out of five on my wake the neighbor scale. And, guys, keep in mind that is with the factory cats and mid-pipe in place. Replace those with some more free-flowing aftermarket goodies, if you will, and well, at that point, you're gonna start moving into the wake the dead scale.Now, the reason for that extremely high rating, see what I did there, is because you really can't see a muffler in sight with the ROUSH system. Instead, again, the only thing that slightly resembles a muffler will be these two small resonators here mounted midstream of the system. And that is, again, gonna take just the smallest bit of volume, smallest bit of edge off the otherwise very unruly system. Now, because of that overall design, the volume is obviously there, but my favorite part is the deep rumbling tone of the ROUSH. I think it's probably one of the better sounding three-valve systems out there because of this, and because it does maintain that deep tone.Now, aside from that volume and the deep tone we just talked about, the ROUSH is also gonna deliver some pretty solid materials and build quality throughout. Now, this does consist mainly of the 409 grade stainless steel for a majority of the system, including your two-and-a-half-inch mandrel-bent tubing, along with those mid-mounted resonators and hangers, while the twin four-inch tips do boast that premium 304 grade stainless steel before being stamped with that iconic ROUSH logo. Now, the kit does include all of the clamps needed for the install, but the site is gonna recommend one extra thing, and that is picking up an aftermarket stainless steel hanger kit for ultimately the best install. Now, speaking of that install, we wanna get into the job a little bit more, show you what it takes to knock out this bolt-on job in your garage or driveway. So, grab your toolbox and check out our detailed walkthrough and tool breakdown now.Man: Tools used for this installation, three-eighths ratchet, three-eighths extension, 13, 15-millimeter sockets, 13-millimeter ratcheting wrench, and three-eighths electric impact. Hey guys, I'm gonna show you how to uninstall and install our cat-back exhaust here on our 2006 Mustang. First thing we're gonna do is I'm gonna take my 15-millimeter on my electric gun, and I'm gonna loosen up our clamp back here holding our muffler off. I already sprayed it with PB B'laster. Next we're going to remove this 13-millimeter here that holds the front hanger of the muffler. And then there's another one on the side. So, I'm gonna take my 13-millimeter on my gun, loosen this bolt up, it'll let this hanger come down.So, now we're gonna come up to the front of the muffler here. There's a 13-millimeter here and a 13-millimeter on the side. I'm gonna take my gun with my 13-millimeter and remove this one first. Once I have that one off, I'm gonna take my 13-millimeter on my ratchet. You might not be able to see this, but I'm gonna get up in here, loosen this one up. Now that I have that loose, there's one more bracket holding it on, on the other side. So, now we got a 13-millimeter up here. This is holding on our back grommet here that holds the exhaust on. I'm gonna take my 13-millimeter on my ratchet and loosen this one up, and take this one out. Now with our hangers off and disconnected, we're gonna remove our muffler. You should be able to just start to slide it off. Now you're gonna wanna repeat this whole procedure on the other side.Now that we have our mufflers off, we're gonna loosen up our four 15-millimeter bolts here. They're holding on our mid-pipe. I'm gonna loosen that up, then we'll be able to remove our mid-pipe. So, I'm gonna take my 15-millimeter on my electric impact gun and break these loose. I did not take 'em off all the way, I just broke 'em loose enough to get the clamps loose. Next, we'll remove our mid-pipes. So, now that we have our four 15-millimeters loose, I'm gonna remove our mid-pipes. I'm gonna just slide it right out just like that, and do the same for the next side.Now that we have both our pipes removed, I'm gonna install our new pipes. We're just gonna slide 'em up into place. I'm gonna start by putting the back part over the axle and slide it in place like that. Now you're just gonna wanna repeat that on the other pipe. So, now that we have our mid-pipes on, we're going to install our tailpipe. What we're gonna do is put our two hanger brackets on and our clamp, and then take this and put this up into place. So, I'm gonna stick my one hanger in the front. Just slide it into place here. One in the back. And then we'll install our clamp before we slide this up into the vehicle.So, now that we got all our hangers on and our clamp, we're gonna stick this up into place, and we'll install and get a bolt started in our brackets. And we'll get one started back here. Now that I got them started... Now in our Mustang here we only have three bolts, you might have four, so you're gonna have to put one back here. I'm gonna get my ratchet and my socket, and we're gonna tighten these up. So, now I'm gonna take my 13-millimeter on my impact gun, tighten the bottom ones up here. This one here. And I'm gonna take my 13-millimeter ratcheting wrench. Get up in here. Now I'm gonna tighten up our clamp back here. I'm just gonna get this in place. Lift up a little bit, get our pipe where we want it, and I'm gonna take my 15-millimeter on my electric gun and tighten this up. Now you're gonna want to just repeat this same tailpipe procedure of the install on the other side.Now we're gonna tighten up our four 15-millimeters up front. I'm gonna take my 15-millimeter gun on my electric impact, tighten these up. You'll also be able to move your exhaust around, so you get it where you want it lined up in the back. And that'll wrap up this install. That wraps up this review and install of our ROUSH Extreme Performance Cat-Back Exhaust for '05 to '09 GT and GT500s. Thanks for watching. And for all things Mustang, keep it right here at

      Product Information

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

      Features & Specs

      • Deep Off-Road Exhaust Tone
      • Muffler Delete; Mid Resonator Design
      • 2.5" Stainless Steel Tubing
      • 304 Stainless Steel Tips with Roush Logo
      • Fits 2005 to 2009 GT and GT500 Mustangs


      Aggressive Muscle Car Sound. Let your engine howl with a Roush Extreme Performance Cat-Back System. This innovative Roush exhaust system features a muffler-delete design with resonators mounted directly after the Mid Pipe, that results in increased air flow, and a unique sound, with no in-cabin exhaust drone.

      Quality Roush Construction. Constructed from CNC mandrel bent 2.50-inch diameter stainless steel tubing for a durable long life, the Extreme Performance Cat-Back System features two 304 polished stainless steel 4-inch tips with embossed "ROUSH" logo.

      Application. This Roush Extreme Performance Cat-Back System will fit the 2005 to 2009 GT and 2007 to 2009 Shelby GT500 Mustangs with the factory rear valance.

      Technical Note. Americanmuscle recommends adding the 2005+ Mustang 304 Stainless Steel Exhaust Hanger Kit from the drop down option above, to provide more strength, stability and a cleaner installed appearance. If you have a 2007 Mustang you may need the kit for correct installation.



      Roush 403936

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) catback pipes with mufflers
      • (2) Muffler assemblies
      • (2) Clamps


      Customer Reviews (200)

        Questions & Answers

        10 More Questions

        Will It Fit My Mustang

        • Bullitt - 08, 09
        • GT - 05, 06, 07, 08, 09
        • GT500 - 07, 08, 09

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