Talk to a Mustang Expert
Mon - Sun, 8:30 AM EST - 11:00 PM EST

Free Shipping On Orders Over $49. Details

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

Market Price $649.99 You Save 23% ($150.00)
On Sale


FREE Shipping
  • Item 69110
  • MPN# 403936

In Stock Ships same business day. Choose options to add to cart

Features, Video & Details

  • 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

Review & Installation Video

Review & Install Video

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 2.5" diameter stainless steel tubing for a durable long life, the Extreme Performance Cat-Back System features two 304 polished stainless steel 4" 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.

Fitment: 2005 2006 2007 2008 2009 Details

What's in the Box
  • (2) catback pipes with mufflers
  • (2) Muffler assemblies
  • (2) Clamps
Installation Info
Tech Specs
Cat-Back Exhaust Specifications
Piping Material: Stainless Steel Tip Material : Polished 304 Stainless Steel
Piping Size: 2.5" Tip Size: 4"
Muffler Type: None / Resonator Fitment: 2005-2009 GT & GT500 Mustangs
Will it fit my Mustang?
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09
  • GT500 - 07, 08, 09

People Who Bought This Item Also Bought

Most Helpful Reviews

Wow! What a difference.

I had the Magnaflow Axlebacks on for close to 6 years prior to finding an exhaust sound clip of the Roush Extreme online. I knew that I wanted to upgrade to the Roush! Let me say the sound clips sound ...

Read More
Helpful (5)


Paired this catback with the pypes x-pipe on my 2006 V6. Just the best sounding V6 I've ever heard. Easy installation, awesome tone, no drone, and the heavier the throttle the better sounding it gets. ...

Read More
Helpful (4)

Overall Rating 4.9 out of 5 stars
Read All 85 Reviews

Customer Photos (24) Submit Your Photo

View All 24 Photos

You Might Also Like

30 Questions / 9 Answers

Ask a Question

Do I have to Change my mid pipe? I have been looking for a while on trying to make my '07 California Special louder. I have listened to a countless amount of sound clips trying to figure out what I like best. After hearing this system on the Internet I think I found what I have been looking for. I was wanting to know if I needed to change to a different mid pipe. I love the deep muscle car note with the h pipe over the race car growl with the x. I hope to keep the h for this system. Will I be able to?


  • You do not have to change your mid-pipe for this particular catback system (I have this exact one in my car). You will gain a louder sound, especially because this system has resonators (that don't drone!) and no mufflers. However, if you want louder, deeper sounds, replacing your mid-pipe is a strong suggestion. Either go with an H-pipe or Pro-Chamber (even a little deeper sounding than H). Even better, if your state allows it, go sans catalytic converters (ie. off-road). You get a louder sound, cut weight from the existing (read: heavy) exhaust system, and also increase MPG as the car can breath and flow exhaust better. The choice is, of course, yours but at the end of the day, you can keep your existing mid-pipe as is.


Show 2 more answers Helpful (1)

Would it fit my v6?


  • You could install this Roush Catback, or any other GT catback of your choice, when combined with the Cut and Clamp X-pipe which I've attached below for you. Essentially, you'd be converting to dual exhaust. The x-pipe will reuse your stock catalytic converters and then bolt up to whichever GT catback you decided upon. Hope this helps!


Show 1 more answer Helpful (1)

Will it fit a 2010 v6 if I pair it with an X pipe


  • Hello, the Roush Extreme Performance Cat-Back System is meant for the GT/ GT500 models but when paired with and X-pipe will allow it to be compatible with a V6.


Helpful (0)

What's the loudest exhaust setup I can possibly do available on American muscle


  • Hey Kev, So the loudest exhaust system would consist of longtube headers, an off road x pipe, and a resonated cat back system. Kooks long tubes with kooks off road x pipe, and either a roush extreme, flowmaster outlaw, pypes pype-bomb, or borla atak catback systems to finish the package. Those will be the loudest set ups that we carry.


Helpful (0)

Will this be able to fit with the Pypes 1-5/8 in. Long Tube Headers w/ Shorty X-Pipe?


  • The Roush Extreme Performance Cat-Back System would be able to fit without modification using the Pypes Long tube headers and Shorty X Pipe.

    Rob D

Helpful (0)

Will this fit 05-09 v6? If yes what will I need to do?


  • Unfortunately this Roush Extreme Performance Cat-Back System is only intended for use with a 05-09 Mustang GT and Gt500. This exhaust system will not line up correctly on a V6 Mustang without any modifications.


Helpful (0)

More Products You Might Like

Customer Reviews (85) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Loudness / Volume 4.75 4.8
  • Exhaust Note 4.8625 4.9
  • Fit & Finish 4.825 4.8
  • Bang For Your Buck 4.775 4.8

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    June 19, 2012

    Wow! What a difference.

    I had the Magnaflow Axlebacks on for close to 6 years prior to finding an exhaust sound clip of the Roush Extreme online. I knew that I wanted to upgrade to the Roush! Let me say the sound clips sound good but the first time you turn that key after installation is mind blowing! The Magnaflow's sounded O.K. but they were quiet and never really captured that old school Mustang sound. The Roush delivers;you won't be disappointed!


    Year: 2006 Submodel: GT Creedmoor,N.C.

    Helpful (5)

  • 5/5

    Installation Time: Afternoon

    January 13, 2014


    Paired this catback with the pypes x-pipe on my 2006 V6. Just the best sounding V6 I've ever heard. Easy installation, awesome tone, no drone, and the heavier the throttle the better sounding it gets. Highly recommend this product, and it's cheaper than other systems. Kudos Roush Performance and American Muscle!


    Year: 2006 Submodel: V6 Laguna, California

    Helpful (4)

  • 5/5

    August 26, 2016

    Can you hear me know?

    Put these on a stock 06 GT convertible (manual) and the gas mileage went down all of a sudden cause I can't help myself! From the sweet gurgle as you let off the gas to the trumpet at high rpm's this setup is music. The tips fill the opening nicely and the figment was right on. You can creep around your neighborhood without getting the stink eye thrown at you but when it's time to open it up she'll surprise you.


    Year: 2006 Submodel: GT

    Helpful (3)

  • 5/5

    Installation Time: Afternoon

    March 10, 2015

    Awesome exhaust that will definitely make your V8 (or V6) come to life!

    The installation between me and my buddy took about 3 to 4 hours with only the back end lifted up. If you can get the entire car lifted it will take a significant less amount of time. The installation was relatively easy aside from having to drop the drive shaft to fit the new rear section of pipe above the axle. The engine sounds amazing and really makes the car feel like a classic. It has a deep burble tone to it, but without the inside drone you find in many other exhausts. It definitely is louder than stock (especially when you start it), but once the engine warms up it isn't too much louder at idle. If you are worried about sound, I can tell you honestly that it is louder, but it's not to the point of disturbance. If you stay off the gas it's very easy to get through the neighborhood unnoticed. Though, it will put a smile on your face in the open road. Highway speeds have a very moderate sound that makes long trips much easier. I would definitely recommend this exhaust, and only would suggest one with a muffler if anything above stock sound is too much for you.


    Year: 2008 Submodel: GT Sacramento, CA

    Helpful (3)

  • 5/5

    Installation Time: Less than 1 Hour

    December 06, 2013

    amazing tone and growl

    i have a 2006 gt. had borla stingers with bbk o/r x pipe. sold the borla and went with roush and bbk midpipes. sounds great and is exactly what i was looking for. very aggressive. i highly suggest this exhaust to anyone wanting that mean and aggressive sound. thumbs up. cant complain about the price either.


    Year: 2006 Submodel: GT sc

    Helpful (3)

  • 5/5

    Installation Time: Less than 1 Hour

    February 13, 2013

    The Sound of Performance

    This product is awesome makes the sound and performance incredible, one must be careful not to get speeding ticket, because the faster you go the better the sound gets.


    Year: 2008 Submodel: GT fl

    Helpful (3)

  • 5/5

    Installation Time: Afternoon

    September 27, 2012

    In search of the lost tone

    Quality and fitment are off the scale! This was an all out exhaust makeover for my baby. Installing detroit rocker cams, kooks long tube headers w/ high flow cats and x-pipe and the Roush Extreme. I have to admit the lack of an axle back muffler on my convertible was just way too loud for my taste. I ended up leaving the Roush mid pipes installed and reinstalled my Flowmaster Hushpowers. I now truly have the late 60's rumble and tone I was searching. If you are there in August 2013, you will hear the roar of the Roush Extreme when the the axle back pipes are reinstalled just in time for the next AM mustang show and the muffler (or non muffler) wrapping contest. :-)


    Year: 2008 Submodel: GT Ashburn, VA, USA

    Helpful (3)

  • 5/5

    Installation Time: Less than 1 Hour

    June 22, 2012

    How a mustang should sound!!!

    Let me first off and say i had just the Pypes pype bomb axleback for over a year and loved them. They were loud, and aggressive, but i wanted the whole catback system. So i decided on the Roush, i almost went with the Pypes M80 system but heard that it had fitment issues. So now to the Roush exhaust. Its loud, aggressive, and has a deep sound. And there is no drone from this exhaust. It sounds like a true muscle car! But at the same time its quiet when u want it to be. But at WOT ITS SOUNDS AMAZING! Fitment was perfect, took about a Hour to put it on with floor jacks and floor stands.


    Year: 2006 Submodel: GT Richmond, VA

    Helpful (3)

  • 5/5

    Installation Time: Afternoon

    April 12, 2012

    Great sounding, loud when you want it and nice and subtle when you don't!

    Great exhaust for the S197 platform, with beautiful 4" tips. The install took me a few hours, using a floor jack and stands in my garage. This is my first exhaust install and I was able to complete the job in just a few hours by myself. I also added the Air Raid Race CAI and SCT Tuner with Bama custom tunes. Initial start-up was quite a bit louder than stock, but once the car warmed up it settled down to a nice throaty rumble. At anything over 2500 RPMs it just roars, with a bit of rasp.. It reminds me of the 99-04 SVT Cobra exhaust which to me is one of the best sounding stock Mustangs around. Great fit, great finish and great sound.


    Year: 2007 Submodel: GT Charleston, SC, USA

    Helpful (3)

  • 5/5

    Installation Time: Afternoon

    December 09, 2016

    Best sounding exhaust I've heard!

    OMG!!! this is the best awesomest sounding exhaust I've heard and i have had 3 other types of exhaust. This was the perfect sound I was wanting and wishing for. Now there is a little bit of drone at 1900rpms but I have a catted x pipe so it might be different with something else and the drone seems to be only at 1800-2000rpms. But it still sounds awesome and that drone is not bad at all. It was a bit tricky when installing because I didn't have a lift so you have to put in the over axle pipes a certain way. The exhaust is so rich and throaty, deep and when you step on it it is just amazing and sounds really loud. I also have a Roush CAI along with the catted xpipe


    Year: 2005 Submodel: GT

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    December 03, 2016

    Head turner

    Installation took less than 2 hours, it was a breeze. The finished tips look awesome and the sound of the exhaust is mean sounding. Very loud. Get a lot of compliments on the clean sound it make. Loud growl on start up. Overall very pleased with this exhaust.


    Year: 2006 Submodel: GT

    Helpful (2)

  • 5/5

    July 07, 2016


    This exhaust is loud .. I can't stop driving my car it's so addicting I love it


    Year: 2005 Submodel: GT

    Helpful (2)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    December 05, 2013

    Whoa Horse!

    First, I'd like to commend American Muscle for the fast and free shipping. What a wonderful company. Thank you! The exhaust came fast and well packed. I had the Roush Extreme Performance catback exhaust installed just a few hours ago at my local shop and I am so, so happy with it that I'm almost in tears. After months of debating over axleback and catback, I settled on Roush primarily because of the trusted name-the reviews weren't bad either!! The 4" embossed tips are just gorgeous and the fittment is supreme. The sound? I had absolutely no idea how weak the stock exhaust sounded - in fact, I have already forgotten about it! The Roush Extreme can be felt in the seat of your pants and rumbles such a deep, lush and PERFECT tone. Like other reviews on this product, it can be tame when you want it, but on acceleration and especially WOT, it just growls; it means freaking business. It produces a true muscley, throaty, gutteral, bubbling and spitting sound that blends so uniquely well together. It's almost like I have a brand new ride. Taking the time to write this review is killing me, because I would honestly rather be out driving right now! I whole heartedly recommend this product a hundred times over. I would recommend foregoing ANY axleback system, save your money if that is what it takes and buy this! The Roush Extreme Performance -IS- THE WAY TO GO! You will not be disappointed....


    Year: 2008 Submodel: GT Georgia 316, GA, USA

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    March 11, 2013

    Sounds amazing!

    Just installed this system on my 07 GT, and I must say it sounds VERY good! Install time using my garage without a lift was about 2.5 hours taking my time. I recommend using a lift if you have access to one would probably reduce install time by 40-50%. The hardest part is removing the stock exhaust, the Roush kit was installed with little to no trouble at all. Exhaust drone is almost non-existent. The note that this system yields is a deep and aggressive at idle and cruise but really sounds amazing under acceleration. If you want volume with a deep, aggressive and refined note, this system is for you!


    Year: 2007 Submodel: GT Dalton, GA

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    April 09, 2012

    Best sounding exhaust out there

    I had it installed and it took about 1.5 hours using a lift. It's really not all that loud when your letting it idle. When you get on the gas it rips though. Right after it was installed I had another guy go drive it down the road so I could hear it from where I was at, sounded amazing. I haven't heard a Mustang sound better. Inside though is not bad. You can tell they're back there but they are not that loud. Great Exhaust!


    Year: 2005 Submodel: GT KY

    Helpful (2)

  • 5/5

    Installation Time: Shop Install

    March 03, 2012

    A guttural feeling!

    Waiting with excitement for the shop to call back and hear those soothing four words "your car is ready." Whoo hoo! I headed to the shop, thanked the man for the install then with palms sweaty with apprehension and excitement I opened my door, sat down, turned the key and......WOW! The sound is awesome! The sound is like this guttural sound deep within the bowls of some kind huge lion. Its not really a "throaty" sound just more "guttural" with a hint of throat, if you will. In the higher RPM range the sound crispens up that guttural sound and puts a grin on my face and others as they turn their heads to see what amazing specimen is making that sound. And those 4 inch tips with my 295 tires in the back make my stang look baaad. Also thanks American muscle for your awesome service, its the best!


    Year: 2007 Submodel: GT Colorado

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    February 27, 2017


    Absolutely amazing product....I have kooks Its and kooks catted Xpype I wanted to keep my cats cause I hate the smell but at the same time wanted it to be loud...this exhaust is loud and sounds amazing and has zero drone!!!! pops a lot as well!!!!


    Year: 2009 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    February 22, 2017


    Install was easy took me 20 minutes to install. They sound great with a bbk xpipe and shorty heads and cams.


    Year: 2005 Submodel: GT

    Helpful (1)

  • 5/5

    July 27, 2016

    The Sound!

    This is it boys! If you live in a sound restricted area this is the one for you. Its deeper and more aggressive than stock but not much louder if you keep the rpms down. WOT it roars but isnt as loud as I thought it would be. All the sound goes out the back from inside its quite. Roll down the windows tho and you hear the glorious roar of 300 American horses shooting out the back. Its got a great muscle car idle. Old school sounding. Not quite a camed sound but you would mistake it if you didnt know any better. Idle sounds a little subdued until you hear it reverberating off the buildings around it! Again outside its considerably louder. I notice very little low end power loss if any. Pulls a bit harder up top. This is the perfect exhaust for my needs since I need to keep the factory cats for commissions. Cost me $100 to install from a shop. Oh yeah the hangers DO NOT FIT the 06 model Im glad I took it to a shop they had to rework it but it was an easy job.


    Year: 2006 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    July 19, 2014

    Supreme Exhaust Note

    I have been wanting this system since hearing it online. I finally broke down and bought it and I must admit it was fairly inexpensive and gave my Stang the supreme exhaust note that it needed. I had tried 2 systems previously and was unsatisfied with the sound but after firing this up in the garage I knew I had hit the jackpot!!! This is a great system and went on like a dream. I couldn't be happier with this choice in exhaust!!!! it also has little to no drone making it the ultimate choice for my car!!!!


    Year: 2008 Submodel: GT Florida, USA

    Helpful (1)

Related Mustang Categories