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Magnaflow Competition Cat-Back Exhaust - 3in. (05-09 GT, GT500)

Market Price $910.10 You Save 12% ($104.70)
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  • Item 388826
  • MPN# 16674

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Quoted installation from $125

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    Features & Details

    • Aggressive Muscle Car Sound
    • Competition Series Bullet Style Mufflers
    • Stainless Steel Construction
    • 3-Inch Diameter Mandrel-Bent Tubing
    • 4-Inch Diameter Polished Stainless Steel Tips
    • Fits 2005-2009 GT, Bullitt And GT500 Mustangs
    More Power. Stop choking off your V8 powered Mustang with the restrictive stock exhaust system and enjoy more power by installing a Magnaflow 3 Inch Competition Cat-Back. A Magnaflow 3-Inch Competition Cat-Back will eliminate power robbing restrictions for a measured increase in horsepower and torque at the rear wheels of your GT, Bullitt or Shelby GT500.

    Aggressive Muscle Car Sound. Give your V8 powered 2005-2009 Mustang the aggressive rumble it deserves with a Magnaflow Competition Cat-Back. This premium quality exhaust features free-flowing, straight-through bullet style mufflers that increase power and give your Pony an unmistakable muscle car sound.

    Magnaflow Quality. Constructed from durable 3-inch diameter mandrel bent stainless steel tubing for it's corrosion resistant properties, this Magnaflow Cat-Back features 2 straight-through Competition mufflers with brightly polished 4-inch stainless tips, that exit in the stock locations for impressive muscle car looks and sound.

    Application. This Magnaflow 3 Inch Competition Cat-Back Exhaust System is specifically designed to fit 2005 to 2009 GT, Bullitt and Shelby GT500 Mustang models with a Magnaflow or aftermarket 3-inch Mid Pipe installed.

    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) Competition Muffler Assemblies
    • (2) Over Axle Tail Pipes
    • (2) Clamps
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material: Stainless Steel Tip Material : Polished Stainless Steel
    Piping Size: 3" Tip Size: 4"
    Muffler Type: Straight-through Fitment: 2005-2009 GT, Bullitt, GT500
    Will it fit my Mustang?

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    Questions & Answers (2)

    2 Top Rated Questions

    Since y'alls description is fairly vague at best. Is this setup for a single inlet? Cars turboed so I need something that is single in dual out..

    • The Magnaflow Competition Cat-Back Exhaust is comprised of two completely separate pipes. So this cat-back is dual in/dual out.

    Helpful (0)

    the kit explains is intended to bolt to a 3"midpipe. so does this mean any midpipe that is 3" not magnaflow specific? will it bolt with the kooks 3" catted x pipe?

    • The Magnaflow Competition Cat-Back Exhaust - 3in. (05-09 GT, GT500) does not need to bolt up to a Magnaflow specific midpipe. As long as the midpipe you want to use has a pipe size of 3" you can bolt the The Magnaflow Competition Cat-Back Exhaust up to it.

    Helpful (0)
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    Customer Reviews (3) Write a Review

    Overall Rating 4.3

    out of 5 stars

    Installation Time:Weekend

    Installation Cost:$100-$250

    • Loudness / Volume 3.666667 3.7
    • Exhaust Note 5 5
    • Fit & Finish 4.333333 4.3
    • Bang For Your Buck 4.333333 4.3

    • 4/5

      Installation Time: Afternoon

      June 20, 2018


      I bought Magnaflow exhaust because of the tone. I am not disappointed. I also bought it because it is generally quiet unless you're on the pedal. Again, not disappointed. It isn't as quiet as I anticipated, but, I'm getting old! Ha. It is an awesome system that is expensive, but will withstand the test of time.


      Year: 2009 Submodel: GT500

      Helpful (2)

    • 5/5

      June 24, 2017

      Completes the package

      I have a fairly heavily modified GT, cold air, TB, intake manifold, cams, long tubes with a 3 inch H pipe. But stock 2 1/2 inch over axle pipes and some axle backs. I really didn't like some of the sounds it was making in the low RPMs. These pipes changed all that! Gave me a nice consistent deep growl, I love it! Really lets her flow and completes the package. The guys at the shop said they went in nice and the instal only cost me a 137 bucks. I would recommend this set up to anyone with a 3 inch H pipe. Oh, and AM had it to me in 3 days!


      Year: 2008 Submodel: GT

      Helpful (6)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      January 15, 2016


      Exhaust sounds GREAT! Love the look of the 4 inch stainless steel tips. If you are looking for a deeper rumble sound for your mustang then this is the right exhaust to get!


      Year: 2006 Submodel: GT Rio Rancho, NM

      Helpful (6)

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