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Magnaflow Competition Cat-Back Exhaust - 2.5in. (05-09 GT, GT500)

Market Price $1,059.59 You Save 32% ($337.14)
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  • Item 48020
  • MPN# 15883

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Features, Video & Details

  • Aggressive Muscle Car Sound
  • Stainless Steel Construction
  • 2.5" Mandrel-Bent Tubing
  • 4" Polished Stainless Steel Tips
  • Competition Mufflers
  • Fits 2005-2009 GT, Bullitt And GT500 Mustangs

Review & Installation Video

Review & Install Video

Hey I’m Justin with, and I’m taking a closer look at Magnaflow’s Magnapack Cat-Back exhaust fitting the 05-09 Mustang GT, and GT 500. The Magnapack gets its name from these two Bullitt style mufflers which are a throwback to the classic glass packs of the 60’s and 70’s hot rod era, and the sound you get is going to reflect that and you’ll definitely hear that classic muscle car rumble. The entire system features full stainless construction including the 2.5” mandrel bent tubing, the straight through design Magnapack mufflers, and finally the large 4” brightly polished tips. Getting this catback installed isn’t really that big of a job and should take you roughly two hours from start to finish using basic hand tools. Now let’s hear how the Magnaflow Magnapack Cat-Back sounds compared to your factory exhaust.

Free Flowing Exhaust. Magnaflow delivers the ultimate free flowing exhaust for the 2005-2009 GT, Bullitt and GT500 Mustangs with this Competition Cat-Back Exhaust. By eliminating power robbing restrictions, more horsepower and torque is produced where it belongs - at the rear wheels.

Aggressive Muscle Car Sound. The Magnaflow Competition Cat-Back Exhaust System features a set of straight-through bullet-style competition mufflers to give your Mustang that loud, aggressive exhaust note of muscle cars of yesteryear.

Quality Magnaflow Construction. Each piece of the Magnaflow Competition Cat-Back System is constructed from 2.5" mandrel bent stainless steel tubing for long life and a perfect fit. The system features (2) competition straight-through mufflers as well as (2) brightly polished 4" stainless steel tips that exit from the stock location for impressive good looks.

Application. Made as a direct bolt on, this Magnaflow Competition Cat-Back Exhaust System will bolt straight up to the factory 2.5" Mid Pipe without any modifications required on the 2005 to 2009 GT, Bullitt and Shelby GT500 Mustangs to give it a deep aggressive sound.

Note: Coupon codes cannot be applied to this product.

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) Tail Pipes
  • (2) Competition Mufflers
  • (2) Clamps
Installation Info
Tech Specs
Cat-Back Exhaust Specifications
Piping Material: Stainless Steel Tip Material : Polished Stainless Steel
Piping Size: 2.5" Tip Size: 4"
Muffler Type: Straight-through Fitment: 2005-2009 GT, Bullitt, GT500
Will it fit my Mustang?
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09
  • GT500 - 07, 08, 09

Most Helpful Reviews


Nice and loud!!! Old school sound. I get complimented all of the time. Along with long tube headers and off road h pipe, I wake the neighbors all of the time.

Helpful (7)

Simply Amazing

This catback system is simply amazing. The sound is so crisp and healthy. I would definitely recommend this to anyone who wants their car to sound amazing. I installed them with BBK long tube headers and ...

Read More
Helpful (7)

Overall Rating 4.6 out of 5 stars
Read All 28 Reviews

Customer Photos (11) Submit Your Photo

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4 Questions / 4 Answers

Ask a Question

Are these legal to have in the state of Illinois?


  • These are illegal in the state of Illinois under (625 ILCS 5/12-602).


Helpful (0)

Will this work with the MAC H-pipe for a V6 dual exhaust conversion? I have an 07 V6 premium with the pony package and am looking to add duals in my car. I really love the magnaflows and am hoping they can capture that deep, classic, throaty exhaust sound of classic muscle cars. I would like to pull the factory Y-pipe and add a MAC H-pipe, keep the stock cats and then add this on for the true dual exhaust.


  • Yes, the MAC Cut & Clamp Pro Chamber Mid-pipe (05-10 V6) can be installed on your 07 V6 along with this Magnaflow Magnapack Catback. It would reuse your stock cats and would be a great combination. Hope this helps!


Helpful (0)

do i need a x-pipe or h-pipe with this product. do i need a tuner when installing? the car has a 5speed manual.


  • No you don't need either when installing this catback. This Maganflow Magnapack will bolt straight up to the factory mid-pipe without any modifications. That being said, if you were to upgrade your stock mid-pipe with an h-pipe or x-pipe, you would increase your total gains. Installing this catback with the stock mid-pipe does not require a new tune. Hope this helps!


Helpful (0)

Curious Im going to be getting an 05-09 GT soon and I've been looking on your site for a long time now and been trying to piece together the best exhaust. My question is, can this combo work with this Magnaflow Magnapack Catback? ---> BBK Ceramic Long Tube Headers & BBK Shorty Catted X-Pipe. Thank You


  • You shouldn't run into any issues bolting up the BBK shorty x-pipe with this Magnaflow Catback or any other brand catback. The main concern when doing an exhaust upgrade with long tubes is to stick with the same manufacturer. So if you are doing the BBK Long Tubes, you will definitely want to stick with the BBK Shorty mid-pipe, which will ensure the best fitment! From the mid-pipe back, you can pretty much pick and choose whichever catback best suits your style! If you want any tips or advice on different set ups, give us a call! We'd be more than happy help you out!


Helpful (0)

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Customer Reviews (28) Write a Review

Overall Rating 4.6

out of 5 stars

Installation Time:Weekend

Installation Cost:0-$100

  • Loudness / Volume 4 4
  • Exhaust Note 4.111111 4.1
  • Fit & Finish 4.888889 4.9
  • Bang For Your Buck 4 4

  • 5/5

    July 16, 2009


    Nice and loud!!! Old school sound. I get complimented all of the time. Along with long tube headers and off road h pipe, I wake the neighbors all of the time.


    Helpful (7)

  • 5/5

    October 06, 2008

    Simply Amazing

    This catback system is simply amazing. The sound is so crisp and healthy. I would definitely recommend this to anyone who wants their car to sound amazing. I installed them with BBK long tube headers and a BBK x-pipe. I noticed that after about 2 weeks of driving around, the exhaust has quieted down. It definitely isnt obnoxiously loud, but sounds so good that it turns a lot of heads. Would recommend!!!


    Helpful (7)

  • 5/5

    February 21, 2008


    Extremely awesome exhaust. Threw it on my \'07 Mustang GT in a matter of an hour, and now enjoying the deep, loud sound the 281 produces. I don\'t even listen to music in my car anymore, cause the exhaust sounds too good. Recommended!!

    Joel Anctil

    Year: 2007 Submodel: GT

    Helpful (7)

  • 5/5

    September 15, 2009

    Classic Sounding Exhaust

    This exhaust sounds and looks great. Very authentic sound. Those idiots with fart pipes are jealous!

    Jon Novak

    Helpful (6)

  • 4/5

    March 26, 2009

    I wanted flowmasters orignally

    I own a 05\' V6 Mustang, and had a professional install the GT magnaflows to replace my single exhaust mustang. I wanted flowmasters originally, but my mechanic told to to get magnaflows as flowmasters sound raspy on the v6. I unhappilly agreed. I couldn\'t be happier, now that its installed. Quite at idle (good, if a cop pulls up next to you), but has a mean rumble when I rev. Prob gave me 10-15 hp.


    Year: 2005 Submodel: V6

    Helpful (6)

  • 5/5

    July 16, 2009




    Helpful (5)

  • 5/5

    April 22, 2010

    magnaflow exhaust

    Bought this with the catted x-pipe and the BBK throttle body. The install took about 2 hrs. WOW what a difference this combination makes!!!! This exhaust is so much better than the stock. Not real loud at idle but if you get on it, it really sounds great.


    Helpful (4)

  • 5/5

    May 09, 2009


    Awesome exhaust...add the magnaflow o/r x pipe and the sound is unreal

    Tommy Gunz

    Helpful (4)

  • 5/5

    December 15, 2008


    I just put these on my 2006 GT and love them. They have a crisp, deep sound that blows the stock exhaust away! I could not be happier!


    Year: 2006 Submodel: GT

    Helpful (4)

  • 5/5

    September 20, 2008


    Just added this Catback and it sounds so smooth on my 08 Automatic. Flows good when I am on the highway and turns heads when I am in city traffic.


    Year: 2008

    Helpful (4)

  • 3/5

    Installation Time: Afternoon

    September 24, 2015

    Magnaflow exhaust

    Fit and finish is awsum. This is the 2nd exhaust I've put on the car and 2nd set of mufflers the last mufflers were flowmaster outlaw series axle back mufflers so I do miss the sound of the flowmaster I do like the magnaflow it sounds more like my stock exhaust if I could afford the flowaster mufflers. But the fit and finish is what u expect from magnaflow if it's good enough for Chip. Foose it's good enough for my 2006 GT.


    Year: 2006 Submodel: GT Council Bluffs Iowa

    Helpful (3)

  • 5/5

    October 31, 2010

    Awesome sound. Awesome quality.

    Paired this with Magnaflow catted x pipe. It's loud and sounds great. My car sounds deep and muscley at lower rpms, but in the high range it sounds like a race car. Would recommend to anyone looking for a sound and performance upgrade.


    Helpful (3)

  • 1/5

    June 17, 2010

    not impressed

    easy install. great looking product. i have an o/r x pipe and this product is just loud. no deep troaty sound. its just noise. i will be selling them as soon as possible....


    Helpful (3)

  • 4/5

    May 01, 2010


    Just had this installed this morning and i love it. it has a nice low tone that just roars quality!


    Helpful (3)

  • 5/5

    April 30, 2008


    I was extremely happy and fufilled when it comes to this systems. I got it installed on my 06 mustang. Like Joel Anctil, I barely listen to my radio, because this system sounds sooo good I just prefer the radio off.


    Year: 2006

    Helpful (3)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    February 17, 2014


    My 2007 gt, which i bought used, was equipped with the magnaflow catback exhaust, part 15881. The sound and quality were good but i desired a deeper exhaust note. Today, i just had magnaflow magnapac catback, parts 15883 installed. If you are on the fence on what magnaflow catback to buy, stop debating and get the magnapacs! Deep tone and with my automatic no drone. Deep growl of quality!


    Year: 2007 Submodel: GT california

    Helpful (2)

  • 4/5

    Installation Time: Less than 1 Hour

    June 26, 2013

    Not too loud!

    I have owned a few performance cars and like my exhaust really loud! This exhaust didn't really get very loud but does have a nice exhaust note. It does just like they advertise. Nice old school rumble but not too loud and no drone. The fitment was great. Had this installed in under an hour! If your looking for extremely loud get the Pypes or Roush cat-back. If you don't want to be too loud this is the exhaust to get.


    Year: 2008 Submodel: GT Arizona, USA

    Helpful (2)

  • 5/5

    June 25, 2011

    Awesome Sound

    I had this installed on my V6 with the help of Magnaflow Cut and Clamp X-pipe. Gotta say this makes the GT's around me sound like nothing. Its always funny going down the road and beating them with my V6. Its an indefinite head turner. Only thing I dont like about it is that it hums at a really high pitch around 2600rmps and gives me a head ache sometimes. Although its definatly worth it.


    Year: 2008 Submodel: V6

    Helpful (2)

  • 5/5

    April 05, 2008

    Sounds Awesome

    This is by far the best sounding cat-back that I\\\'ve heard for 05+ mustangs. Totally worth it!!!


    Year: 2005

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    July 15, 2015

    Awesome Sound

    I bought this Maganaflow Competition Catback Exhaust because I wanted more Air Flow for my 2008 CS/GT Mustang. I also added this w/a Pypes X-Pipe, JLT Air Intake, and Tune. Man did this make a difference. It has a nice Deep Rumble Sound. Everything is bolt on so it was quite straight forward and easy to install. I would recommend buying one.


    Year: 2008 Submodel: GT San Antonio,Tx

    Helpful (1)

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