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

Market Price $599.99 You Save 4% ($24.00)

$575.99

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  • Item 69110
  • MPN# 403936

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Features & 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
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

Most Helpful Reviews

5/5
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 ...

Read More
Helpful (1)

5/5
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 ...

Read More
Helpful (1)

Overall Rating 5 out of 5 stars
Read All 63 Reviews

Customer Photos (22) Submit Your Photo

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19 Questions / 6 Answers

Ask a Question

Does anyone know which exhaust sound better between the Roush Cat back exhaust and the Roush Axle back. Is one louder then the other?

Roly

  • The Roush cat back exhaust will be louder than the Roush axleback exhaust. The cat back system replaces more exhaust piping and will give you a more aggressive and deep tone. The axleback exhaust will only replace the piping from the rear wheels back which will not carry the amount of sound the aftermarket flow pipe will on the cat back system.

    KevinD92

    Helpful (0)

is there a setup like this for the roush square tip?

MattyIce

  • Hi, We currently do not carry a Square tip Roush exhaust for 2005 -2009 Mustangs.

    Chris J

    Helpful (0)

Says that it will fit the "factory valance." Does that include the California Special valance?

Nerrak

  • The Roush Extreme Performance Cat-Back System (05-09 GT, GT500) will also fit with the California special rear valance.

    Ricky36

    Helpful (0)

will this exhaust give my auto v6 alot of pops when i rev and when im driving i heard that the roush is the one with a lot of pops and crackles is that correct from what you know.

supersicksixer

  • You will notice a little bit of popping. The popping is really determined by how the car is tuned and some other factors. The GT models which this kit is designed for will see more popping due how the 4.6 motors are designed and the kind of sound a V8 will make. Where as the 4.0 V6 motor will always have more of a smooth sound.

    SalC7

    Helpful (0)

I have a 05 Roush mustang with the Roush rear fascia with square exhaust tips. I'm running the off road Roush mufflers which I like but hate the drone I'm getting If I install this and use just the part with the resonators will it connect to my mufflers without any changes? Thanks.

Warpspeed

  • It appears that this should be compatible with the system you are referring to. I will recommend contacting Roush Directly since both kits are made by them.

    SalC7

    Helpful (0)

Would this exhaust system be legal in North Carolina.

MustangSally

  • The Roush Extreme Performance Cat-Back System (05-09 GT, GT500) is legal for use in North Carolina since North Carolina is not a state that is CARB restrictive. For further information as to what is restricted and approved in your state, please contact your local or state DMV.

    KevinD92

    Helpful (0)

Customer Reviews (63) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Afternoon

Installation Cost:$100-$250

  • Loudness / Volume 4.793103 4.8
  • Exhaust Note 4.913793 4.9
  • Fit & Finish 4.810345 4.8
  • Bang For Your Buck 4.844828 4.8



  • 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

    xPAtrioTXx

    Year: 2005 Submodel: GT

    Helpful (1)

  • 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.

    Mongo

    Year: 2006 Submodel: GT

    Helpful (1)

  • 5/5

    July 07, 2016

    Crazy

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

    DRIZZYLUISBOY

    Year: 2005 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!!!!

    Ovalman62

    Year: 2008 Submodel: GT Florida, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    April 29, 2014

    LOVE IT!!

    I am in love with the way it sounds. Im still running factory airbox as well. I can't wait to get my new CAI and get it tuned. I love opening her up so I can hear it scream as I'm going down the road. I had a little hard time getting the old exhaust out but after that it was smooth sailing. I so recommend this!

    zwilson05

    Year: 2006 Submodel: GT Chattanooga, TN, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    September 21, 2013

    Satisfied

    Installed this system on my 2008 GT Convertible (manual) around 1.5 months ago... My only other relevant modifications are a 90 mm CAI and 93 octane performance custom tune. I have a 3.55 gear ratio and upgraded ignition coils if it matters. I'm an aircraft engine mech by trade. The removal/install and cleanup took me 2 hrs alone with a lift. This was my first exhaust install, however, and I was being extremely meticulous. I have zero issues with the fit and the quality of the product was much better than expected. Felt the hp/tq increase over the CAI alone but can't say how much without a dyno. The exhaust note is deep (almost truck-like) before 2000 rpm then sounds like race car the closer I get to WOT. It was very loud and droned in all gears the first 150 miles (which wasn't bad). It died down to stock level for another 100 miles (to the point my co-workers and I thought something was wrong) but it gradually regained volume the last 500 miles and only drones between 1800 - 2000 rpm. I'm immensely satisfied with this system for the price and would buy it again. Perfect if not overkill for my street only set-up with plans for a supercharger in the future.

    fastlane247

    Year: 2008 Submodel: GT United Kingdom

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    July 28, 2013

    Roush cat back mufflers

    They sound great! Great sound for cruising. No drone inside. All the sound goes out back. Makes the car sound tough.

    JPM17

    Year: 2007 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    July 23, 2013

    AMAZING sound!!!!

    My car: Shadow, 2007 Black GT Convertible Loud on revs and loud on full throttle. I had a headache after driving it on the first day, but could be other factors. If you're concerned about the cops being drawn to it, just dump it in 5th gear and cruise and it sounds STOCK. My car seriously sounds like a new car with this exhaust...it bubbles on start up and downshifts and sounds like a 60s/70s Mustang... I can't recommend this enough!

    SeaLight

    Year: 2007 Submodel: GT NJ

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    March 28, 2013

    A Pheonominal Catback Exhaust!

    I have this installed along with a MAC offroad Pro-Chamber. This sucker is all business from the second the engine turns over. A loud LOUD growl tells you and others it's go time. Most people always worry about drone, including me. However, I can tell you with 100% certainty that if you are traveling at 65-80 MPH in 5th gear (I have a manual), there will be no drone. In fact, if you're simply maintaining speed and lightly touching the throttle, the noise isn't that much louder than stock, and I truly mean "not that much louder." The way the resonators were put on this bad boy, drone is kept to a minimum at speed. Now, if below 2000 RPM or so in top gear and accelerating/not at top speed, then it will bellow loudly through the whole car. It's a tradeoff, I guess. In addition, right around 2750-2800 RPM (in any gear) the strong growl turns into a loud trumpet-like noise until it goes over 3000 RPM. An intersesting sound that really is at its loudest (this might also be due to the midpipe, I can't be sure). The sound is strong, it certainly turns heads! It's not as loopy low burble noise as I had expected with a pro chamber and this exhaust, but again I don't have upgraded camshafts and it's still pretty darn good ( a heck of an upgrade over stock!) I strongly recommend this exhaust! It looks great, it sounds great, and a truly great bang for your buck, especially when you compare it to a Borla catback system. In addition, this can be installed at any Roush-approved Ford deals, in addition to any other auto shop, with the bonus being Ford backs up its install with a warranty!

    Rooce

    Year: 2008 Submodel: GT Fort Myers, FL, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    March 16, 2013

    Freaking awesome

    Put this on my roush 427r with long tubes hi flow cats. All I can say is it is nasty nice rumble while cruising but when you smash the throttle it's like all you know what breaks loose I love it fit perfect no rattles nothing just quality glad I got this over the pypes system just make sure you jack your car up hi enough and remove wheels if your a driveway mechanic like me!

    fathersonmach12

    Year: 2007 Submodel: Other

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    December 01, 2012

    Awesome Roush Exhaust

    I was skeptical about this exhaust I have owned two mustangs and love my old muscle car sound. I have owned borla magnaflow flowmaster and this is by far the best exhaust I have ever owned very good sound definately turns heads I put it on an 09 shelby GT 500 and it is awesome def recommend this to anyone!

    mustang87

    Year: 2009 Submodel: GT500 La Junta, CO, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    September 04, 2012

    ROUSH EXTREME... 5 STARS

    The hardest part of putting this exhaust on was getting the ols exhaust off. Make sure you can get the car high enough so the long mid pipes have room to drop so you can fish them out over the rear axle. I unbolted the bottom of my shocks to give me a little more room. This system looked great in the box and even better once I got it on my car. Went to a cruize in over the weekend and got many compliemts on how nice the pipes fit and look. These are quiet at idle, but you, and your neighbors, know it when you put your foot in it. The noise level inside the car really isn't too bad even at highway speed. The price might have been a little high, but I don't mind paying for quality and fitment. This system fits like a glove, even has clearance for my 4" aluminuim driveshaft. The only thing bad to say about this system is that I should have bought it sooner...

    DWKFB

    Year: 2007 Submodel: GT Mansfield, PA

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    July 11, 2012

    Classic Roar

    could not believe the difference. sounds like a true classic muscle car, couldnt love it more! Thanks AM

    Bullitt3803

    Year: 2008 Submodel: Bullitt Meridian, ID, USA

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    May 17, 2012

    Wow

    Neighbors look over with longing in their eyes when I start my 07 gt ...It sounds very agressive at first start but tones down when I put it in drive ...Just a note on install , I had to put it high in the air to get old exhaust off ...Wish I would have had a lift !

    Mlester

    Year: 2007 Submodel: GT Aurora,Co

    Helpful (1)

  • 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!

    Rocco

    Year: 2007 Submodel: GT Colorado

    Helpful (2)

  • 5/5

    Installation Time: Less than 1 Hour

    February 22, 2012

    great exhaust

    i installed this roush exhaust on my 08 gt took about a hour to do sounds great at idle as well as driving down the road

    bullet3964

    Year: 2008 Submodel: GT waldorf md

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    January 13, 2014

    Insane

    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!

    Patcollins12

    Year: 2006 Submodel: V6 Laguna, California

    Helpful (4)

  • 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.

    cole25

    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.

    jaen

    Year: 2008 Submodel: GT fl

    Helpful (3)

  • 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!

    Scarlet06

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

    Helpful (3)

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