Free Shipping On Orders Over $49. Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $15,000!! Enter Now
Coronavirus: We are Open For Business, Prioritizing health and safety Learn More

Magnaflow Street Series Cat-Back Exhaust (05-09 GT, GT500)

Item 48018
Call a Mustang Enthusiast at 1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Market Price $828.99 You Save 12% ($96.04)
Our Price


FREE Shipping

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
In Stock

Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

      Review & Installation Video

      Hey, Justin with here, taking a quick look at Magnaflow’s Cat-Back exhaust system, fitting the 2005-2010 Mustang GT and GT 500. If you’re looking for a quality exhaust with great fit and finish and a tone that’s slightly more aggressive than stock, then this exhaust from Magnaflow is definitely worth checking out. You’ll first notice this two piece 2.5” mandrel bent stainless steel tubing and the chambered mufflers which are going to be most responsible for keeping the noise levels down. Finally, everything exits out these 4” polished tips. Something to keep in mind here, even though this exhaust is relatively tame with the stock headers and mid pipe, it really comes to life when you add an aftermarket set of long tubes or an off road X-Pipe, so if you’re planning on bolting some of those parts up down the road and you still want to maintain a reasonable exhaust note without too much rasp then keep the Magnaflow at the top of your list. When it comes time to get everything bolted up just leave yourself a couple of hours from start to finish using basic hand tools. Now let’s hear how Magnaflow’s Cat-Back sounds compared to our factory exhaust.

      Product Information

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


      • Classic Muscle Car Sound
      • Street Series Muffler - Straight-Through Design
      • Durable Stainless Steel Construction
      • 2.5" Mandrel-Bent Tubing
      • 4" Polished Stainless Steel Tips
      • Fits 2005-2009 GT, Bullitt and GT500 Mustangs


      Free Flowing Exhaust. This Magnaflow Street Cat-Back Exhaust System delivers the ultimate exhaust for the 2005-2009 GT, Bullitt and GT500 Mustangs. By reducing back pressure for a free flowing exhaust, more power and torque is produced where it belongs - at the rear wheels.

      Classic Muscle Car Sound. The Magnaflow Cat-Back Exhaust System includes a set of two Street Series Mufflers that feature a free-flowing, straight-through perforated stainless steel core, with stainless mesh wrap and acoustical fiber fill to deliver that smooth, deep muscle car tone.

      Quality Magnaflow Construction. Constructed from high quality 2.5" mandrel bent stainless steel tubing for long life and a perfect fit, this Magnaflow Street Cat-Back Exhaust System features (2) Street Series mufflers and (2) brightly polished 4" stainless steel tips for great Muscle Car styling.

      Application. Designed as a direct bolt on for the 2005 to 2009 GT, Bullitt and Shelby GT500 Mustangs, this Magnaflow Street Cat-Back will bolt straight up to the factory Mid Pipe without any modifications required for more power and a classic muscle car 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

      MPN# 15881

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (16)

      Write a Review

      Ratings Summary

      4.1 out of 5 overall rating from 16 customers

      Installation Time: Afternoon

      • August 30, 2018

        4 2005 GT - Jon Installation Time: Less than 1 Hour

        Nice low rumble

        I’d believe it was stock if I didn’t know. It has a deeper sound than stock and sounds great. No cheap rattle like some others I’ve seen. Seems like good quality however, it wasn’t well packaged. It comes in four pieces with two long pipes and two axle backs. One of my axle backs was bent where it slides over the long pipe. I was able to straighten it without issue.

        Helpful (3)
      • April 03, 2018

        5 2005 GT - SteveR Installation Time: Less than 1 Hour

        The only Pipes for my Mustangs!!

        This was a great purchase and well worth the expense. I love the throaty sound of the Magnaflow's on my 2005 Mustang GT. I installed them on my 2017 Mustang GT California Special (Catbacks with X-pipes from Magnaflow) as well. Totally happy with both of my Mustangs now.

        Helpful (5)
      • March 06, 2018

        5 2005 GT - JulianV

        Came on my used car

        I recently purchased a 2005 mustang GT that I noticed had magnaflow mufflers on it when I went to look at it at the dealer. I thought it was just replacement mufflers but I went to have a Pypes cut and clamp X pipe installed earlier today and the guy told me it is a cat-back exhaust system and I can tell from the pictures that this is my exhaust system. It appears to have been in there for several years, it sounds great, loud enough that my neighbors can all hear me but not ridiculous or annoying, there is no rasp or rattling sound like with cheaper exhausts, at around 1900 rpm you hear a harmonic note, and around 3000 rpm you hear another harmonic note, musical exhaust for sure. I get that muscle car slightly choppy idle and rumbles when it gets a good rev and is dropping revs, and a nice roar when i open the throttle up. Not sure how it compares to stock since I have never owned a mustang with stock exhaust.

        Helpful (5)
      • November 24, 2017

        5 2008 GT500 - Cdub

        Good deal

        Love em, sounds good, easy to install and can feel the added horsepower

        Helpful (5)
      • April 30, 2016

        3 2006 GT - Jbrown Installation Time: Afternoon


        I bought this system a while back; you will not get that 60's muscle car rumble with this exhaust alone, even with my CAI and tune it is still not up to par! I definitely will look into something way louder than this.

        Helpful (7)
      • January 06, 2014

        4 2007 GT - bigjohnny Installation Time: Afternoon


        Great fit and finish but lacks the rumble i desire. I had, prior to my 2007, a 2002 gt that was equipped with a cat back that had the same magnaflow mufflers, my 2002 gt was twice as loud as my 197. This package will give a you a slight louder tone over the stock exhaust. I Will be sticking with magnaflow quality and soon be buying magnaflow magnapacs.

        Helpful (6)
      • December 21, 2013

        5 2006 GT - Hawaiian06Mustang

        Great exhaust..

        I purchased my 06 Mustang 2 years ago and already had JBA shorty headers and this Magnflow cat-back exhaust. It had the factory cats on and the note was good, but rather quiet on the volume. I recently put in "rough idle" cams and Pypes off-road H-pipe. It's got a real deep rumble, the cams sound awesome, and at WOT, it roars! So, if you intend to keep stock cats on, then these Magnaflow are pretty quite, but w/ off-road H-Pipes, it's pretty load. Hope this review helps... Aloha!

        Helpful (7)
      • September 09, 2013

        2 2008 GT - PhilChose Installation Time: Less than 1 Hour


        My mechanic had certified I would love that sound, that he installs only that model on Mustangs, etc. I cannot understand how he was able to give such an opinion. I am definitely disappointed. My stock exhaust was louder. That product is in no way an upgrade. Nobody would change their exhaust to get a model that sounds like all but not what decided you to change your exhaust. I feel I wasted $1,000, including workmanship.

        Helpful (8)
      • April 19, 2013

        5 2007 GT - Luke17 Installation Time: Afternoon

        love it.

        Absolute love it. The polished stainless steel loks amazing. Fit was excellent. Super easy to install (did it in my driveway in two hours using one wrench and 2 sockets). The sound is a nice mean growl and an old school muscle car idle. I didnt want anything crazy loud but i wanted it to sound like muscle should. Magnaflow hit the nail on the head!! And americanmuscle had my questions answered and the kit at my door in less than 48 hours!! Thanks AM!!

        Helpful (7)
      • January 02, 2012

        4 2006 GT - blkbndt Installation Time: Afternoon

        good sound few minor probelems

        well i did this install along with the ford racing long tube headers and off road x- pipe and it sounds great, i think with the off road exaust and long tube headers gives it some extra volume that others complain they dont have. my only problem is the muffler on the passenger side does not sit right either in the clamps or on the hangers because it constantly rattles against the rear valence. and i have taken it off reinstalled it, even replaced the exaust hangers, eventually i just jammed a 2x4 under it, probelem solved. also the sound on these is just amazing when i start it up people are skeptical and confused cause it sounds stock if not quieter than stock, but once u rev it up above 3k rpm, it sounds like a monster. perfect sleeper exaust

        Helpful (8)

      Questions & Answers (5 answers)

      5 Top Rated Questions

      Are these louder then the Magnaflow Competition Cat-Back Exhaust - 2.5in. (05-09 GT, GT500)?

      • The competition may be slightly louder than the street. The street is going to have more of a muscle car sound while the competition has an aggressive sound. I suggest checking out some exhaust videos that will help give you a better idea of what each one sounds like.

      Helpful (1)

      Hello, I have a 2005 Mustang V6 and I'd like to install this kit along with a MAC H Pipe. Is it possible? What else do I need to complete the conversion? Thanks Giuliano

      • The Magnaflow Street Cat-Back GT Exhaust will fit with the MAC Cut & Clamp Pro Chamber V6 Mid Pipe for the 2005 V6. Additionally, the exhaust diameters on the end of the cat-back, and the end of the mid-pipe, which meet are both 2.5 inches, so it will fit like a glove.

      Helpful (1)

      What horse power is gained with magnaflow exhaust with cat backs- headers and cold air intake on a 2006 Mustang GT 4.6

      • Unfortunately we are unable to determine the exact numbers. We recommend checking with your tuner.

      Helpful (0)

      Since the new noise law came in effect in California, will this exhaust noise level pass in California?

      • At this time we do not have a decibel reading for this exhaust.

      Helpful (0)

      What kind of horsepower can I expect with this system?

      • Depending on the modifications this Magnaflow Street Cat-Back Exhaust can add up to 10hp in curve gains with a proper tune.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Flow Tubes
      • (2) Mufflers
      • (2) 2.5" Band Clamps

      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-throughFitment:2005-2009 GT, Bullitt, GT500

      Will It Fit My Mustang

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

          Related Mustang Categories