Roush Axle-Back Exhaust Kit Extreme Stainless Steel GT 2005-2010/GT500 2007-2010

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  • Tap To View 3D Model
  • 304 Stainless Steel Tips
  • 409 Aluminized Stainless Steel
  • Straight-Through Design
MSRP $643.99
You save $12.00

Roush Stainless Steel Extreme Axle-Back Exhaust Kit for all 2005, 2006, 2007, 2008, 2009 and 2010 GT Mustangs and 2007, 2008, 2009 and 2010 GT500 Mustangs.

Roush completely redesigned their Extreme Axle-Back for maximum performance and a more aggressive growl! The Extreme axle-back exhaust from Roush uses 409 aluminized stainless steel for durability and corrosion resistance. With a full mandrel bent construction that extends from the axle to the 4 inch chrome 304 stainless steel dual wall tips for minimal flow restriction. Roush also took inspiration from their 2015 Mustang exhaust systems when they designed this axle-back for your 2005-2010 Mustang GT or 2007-2010 Shelby GT500.

The straight through design is less restrictive and gives this exhaust a tough, guttural sound unique to Roush exhausts. Although the extreme sound of this axle-back may not be for everyone, it’s by far one of the best sounding stand-alone axle-back exhaust on the market today. And at a price that will easily allow everyone to know you are driving something special.

Features and Benefits:
- Totally Redesigned for Improved Performance
- Straight-through Resonator Design
- 409 Aluminized Stainless Steel
- Full Mandrel Bent Tubing
- 4" Flash-chromed 304 Stainless Steel Dual Wall Tips
- Uses OEM Hangars and Mounting Points

*Requires NO cutting or welding.

This kit will use all stock mounting points and comes with the hangars pre-welded. Absolutely no cutting or custom fabrication is required for a perfect fit. All Roush exhausts use CAD data from the original manufacturer in the design process. This ensures perfect, OEM quality fitment and painless installation each and every time.

Order the Roush Stainless Steel Extreme Axle-Back Exhaust for your 2005, 2006, 2007, 2008, 2009 or 2010 MustangGT or 2007, 2008, 2009 or 2010 GT500 Mustangs from CJ Pony Parts today!

California Residents: Proposition 65 Warning

Installation Difficulty


Intermediate skill is required for this installation.

Installation Videos

Video Transcript

It's safe to say the number one modification most Mustang owners make is going to be exhaust systems. That's the reason we do a lot of exhaust videos. You have many options to choose from before you make a purchase for your car. When doing these videos, we always get asked the same two questions: Which one sounds the best, and which one's the loudest? Best sound is kind of tough because it's very subjective. What sounds good to me may not sound as good to you. Loud is a lot easier to figure out. If it's loud, it's loud, and that's the sound your looking for, there's a lot of options out there as well. If you have a 2005 to 2009 Mustang GT, your looking for a loud, aggressive exhaust system, the Roush Extreme would be just what your looking for.

The Roush Extreme axle back is made of 409 aluminized stainless steel and features four inch chrome tips. This is about as close to a muffler delete as your going to get. Roush uses resonators with a straight through design to give you most aggressive sound possible. For this installation you need a lift or a jack and jack stands, half-inch ratchet, fourteen millimeter socket, fifteen millimeter socket, flat blade screwdriver, hammer or mallet, and safety glasses. Even though this car already has an aftermarket axle back, the removal is going to be the same if you have a factory.

Disconnect the two pipes back here from the tailpipe of the axle back, then disconnect the two up front from the tail pipes to your factory H-pipe. Bend up this little tab on the other side so it can come clear. Move the screwdriver to separate the clamp a little bit, and we'll tap it backwards. Since we want to release the clamp back there, just work the pipe out of it. Now we'll slide the muffler off the factory hangers and remove it. Then go ahead and repeat the process on the other side. Now we'll slide one of the clamps over our Roush Extreme resonator, put it up in the factory hangers. Now grab our stock tail pipe, put it back over the rear axle, connect it to our Roush Extreme. Now we'll hammer the sleeve back over in the front here. I'm going to snug down the front bolts. Don't tighten them all the way, just snug them. Now we'll grab the tip and put it up into place. Get it lined up where we want it and tighten it down. Repeat the process on the other side.

Now let's fire it up and hear how it sounds. Definitely very loud, crackly, aggressive sounding, especially with the stock cat still on the car. Actually, having driven it three-valve for a while, I almost forgot how they sounded. These engines still have a nice good sound to them. One of the nice things with the three-valve or any of the, I'd say, pre-2015 cars for that matter, as long as they leave the cats on, they're not loud inside at all. I can hear the exhaust in this car, but it's definitely not overwhelming, even though I know how loud it is outside. I know people are always concerned about drone with these systems. We're going to go up to highway speeds, around that two thousand RPM threshold, and see what it sounds like. That's sixty-five, two grand. You can hear it, but it doesn't have that drone-y sound to it. It just sounds like a nice healthy exhaust. I'll get on it a little bit. Even wide open throttle, inside the car it's not that loud at all. It's actually got a pretty nice tone to it, too. I thought it would be a lot raspier inside, but it really isn't. Given the loud, aggressive sound outside, it's perfectly livable inside.

The name Extreme was the right choice for this Roush axle back. If your looking for something that's loud, aggressive, in your face, it's a perfect choice. While it's not for everybody, this is the sound your looking for, I would definitely check it out. Installation's pretty straightforward, because the fit and finish is top-notch like always. It will only take you around an hour to put on; you'll be back on the road in no time.

Vehicle Fitment

This product will fit the following Mustang years:

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