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SLP Loudmouth Axle-Back Exhaust (05-10 GT, GT500)

AmericanMuscle no longer carries the SLP Loudmouth Axle-Back Exhaust (05-10 GT, GT500). Please check out 2010-2014 Mustang Axle-Back Exhaust for an updated selection.
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Features & Details

  • Aggressive Exhaust Sound
  • Improves Horsepower and Efficiency
  • Muffler Delete Design
  • 2.5” Mandrel Bent Tubing
  • 3.5” Polished Stainless Steel Tips
  • Mandrel-Bent Free Flow Tubing
  • Emission Legal in all 50 States
  • Easy Installation
  • Limited Warranty
  • Fits any 2005-2010 Mustang GT and GT500 Model
Aggressive Sound. The stock exhaust doesn’t really match the beast of an engine your Mustang has. The SLP Loudmouth Axle-Back Exhaust eliminates the restrictive factory mufflers to produce the loudest, most aggressive rumble as soon as you start the engine. The design effectively reduces the back pressure for enhanced efficiency and power with a loud turbo hum that grabs attention right away, even in the noisiest street.

Durable construction. SLP Loudmouth Axle-Back Exhaust is engineered from 2.5” high-quality 409 stainless steel tubing for excellent corrosion resistance and added toughness while pre-welded hangers ensure easy installation without hassle. The tubing is mandrel bend to provide an unrestricted flow that helps spike the power of your baby. Hand-polished 3.5" stainless steel tips provide a bright finish that adds a rich look to the rear of Mustang. This makes sure you get the evergreen blend of style and quality even after years of rough usage and aggressive drives.

Emission Legal. This SLP Exhaust is CARB certified and is smog legal among 50 states so you can enjoy the ride without worrying about breaking the law.

Clamp Installation. Made for easy installation, the SLP Exhaust comes as a direct bolt-on replacement without the need for any kind of modification so you can easily swap them with your factory exhausts with ease.

Limited Warranty. The SLP Loudmouth Axle-Back Exhaust comes with a limited warranty that covers all defects in craftsmanship and materials. For more details and possible exclusions, check the manufacturer’s site.

Application. The SLP Loudmouth Axle-Back Exhaust is made to fit any 2005-2010 Mustang GT and GT500 Models.

Fitment: 2005 2006 2007 2008 2009 Details

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Exhaust Assembly
  • (4) Four Clamps
Installation Info
Will it fit my Mustang?

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Questions & Answers (2)

2 Top Rated Questions

Is it possible to get this on my v6 mustang? I have the pony package so it comes with a dual exhaust. Would it be a direct fit? Or would I have to take it to a muffler shop?

  • This SLP Loudmouth Axle-Back Exhaust is specifically designed for the GT's and GT500's only - it would not be a direct fit for v6 models.

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Hi, why are there two different items listed as "SLP Loudmouth Axle-Back Exhaust (05-10 GT, GT500)". Is there a difference between the two?

  • The SLP Loudmouth Axle-Back Exhaust (MPN-M31014-AA) (Part#23013) Has been replaced with the SLP Loudmouth Axle-Back Exhaust (MPN-M31014) (Part#400357). There is no difference between the two.

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Customer Reviews (2) Write a Review

Overall Rating 5

out of 5 stars

Installation Time:Less than 1 Hour

  • Loudness / Volume 5 5
  • Exhaust Note 4.5 4.5
  • Fit & Finish 5 5
  • Bang For Your Buck 4.5 4.5

  • 5/5

    Installation Time: Less than 1 Hour

    March 05, 2018


    Not much to tell. Normal driving, 30 - 40 mph soft foot, not much louder than the GT 500 mufflers I took off. I can get out of the neighborhood with out annoying anyone to bad. I hope. Cops probably won't take a second look driving normal. Its when you deliberately stomp on her, shes gonna get really loud and angry. Some highway drone, loudness, at 75 -80 but not going to bother us.


    Year: 2007 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    December 02, 2017

    SLP Muffler Delete

    So let me just start off with saying I bought these because they were supposed to have 5 inch tips, upon receiving them I realized they're still 3.5 inch tips so just be warned. I contacted American Muscle and spoke to Joseph who was very apologetic and even sent me a free T-Shirt for the trouble! I did not want to send them back because they are beautifully designed and sound amazing. Overall it's just a muffler delete but I give a solid 9/10 for fit, finish and sound.


    Year: 2008 Submodel: Other

    Helpful (2)

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