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

100+ Reviews
Our Price

$361.95

  • Item #23013
  • MPN# M31014

  • Market Price $376.95
  • You Save 4% ($15.00)
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Customer Photos
Features
  • Rich, Throaty Exhaust Sound
  • 3.5" Polished 304 Stainless Steel Tips
  • Fits 2005-2010 GT and Shelby GT500 Mustangs
Description
Super Aggressive Exhaust Rumble. This SLP Performance Parts Axle-Back System eliminates the restrictive factory mufflers entirely from the 2005-2010 Mustangs, drastically reducing back pressure for enhanced power and aggressive sound.

Rugged, Durable Construction. SLP's Axle-Back system is made from 2.5" mandrel-bent 409 stainless steel tubing, which has excellent flow characteristics and features pre-welded hangers for simple installation. The hand polished, 3.5" dual wall tips give a show quality muscle car appearance to the rear of your Pony.

Application. The SLP Loudmouth Axle-Back is designed to fit the 2005-2010 GT, 2008-2009 Bullitt, and 2007-2010 Shelby GT500 Mustangs.

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 2010 Details

What's in the Box
Hardware included:
  • (4) Four Clamps
Installation Info
Tech Specs
Axle-Back Exhaust Specifications
Piping Material: 409 Stainless Steel Tip Material : Polished 304 Stainless Steel
Piping Size: 2.5" Tip Size: 3.5"
Muffler Type: Straight Through / Resonator Fitment: 2005-2010 GT Mustangs
Will it fit my Mustang?
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09, 10
  • GT500 - 07, 08, 09, 10

Most Helpful Reviews

5/5
Thunder from your pipes!

Really opens up the note from stock or even an aftermarket setup. 3~4k rpm sounds like god letting one rip after chilli night!

Helpful (3)

5/5
A Monster

SLP Loudmouths are the meanest exhaust for a 05-08 Mustang period. At idle they sound mean. At cruising speeds they sound mean. At wide open throttle they sound like an animal. I have heard Mustangs with ...

Read More
Helpful (2)

Read All 100+ Reviews
Overall Rating 4.9 out of 5 stars

Customer Photos (66) View All Photos

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13 Questions / 5 Answers

Ask a Question

What else do I need to put these on my 08 v6 mustang? I was thinking about getting a Pypes cat back exhaust system with out the mufflers and put these on. Are you guys selling any h-pipes or any materials that will let me use these? Dont want to buy from another site.

tcharvey7

  • In order to use these SLP Axle-backs, you will need a conversion kit; we have two easy options for you! You can purchase the Pypes True Dual Exhaust X-pipe Kit, please see the link attached below. This kit allows you to reuse your stock catalytic converters and use any GT Axle-back of your choice. If you wanted a kit with high flow cats included, you could install the BBK True Dual Exhaust Conversion Kit, also shown below, and use the GT Axle-back of your choice. Hope this helps!

    LisaS

    Good Answer (1) (0)

Question Resolved

Do you get any extra horsepower out of this exhaust?

JoshP

  • If your replacing your stock axel backs, you may gain 3-5 HP. But if you have other bolt on`s, you`ll notice a larger gain. Mostly, you will just love the exhaust note!

    jb14

    Good Answer (0) (0)

Show 1 more answer Answer This Question I need this answered (0) (0)

Wheres the resonator/muffler? ive used slp on my previous 00 mustang and i upgraded to an 05. just wondering where the muffler/resonator is on this kit? or is it a muffler delete? thanks in advance!

Gaige

  • The resonator/mufflers are in the tips of the exhaust. Its not really a muffler, more of a toned down straight pipe

    jb14

    Good Answer (0) (0)

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Customer Reviews (100+) Write a Review

Overall Rating 4.9

out of 5 stars




  • 5/5

    March 01, 2010

    Thunder from your pipes!

    Really opens up the note from stock or even an aftermarket setup. 3~4k rpm sounds like god letting one rip after chilli night!

    Mike K

    Helpful (3) (0)

  • 5/5

    July 26, 2008

    A Monster

    SLP Loudmouths are the meanest exhaust for a 05-08 Mustang period. At idle they sound mean. At cruising speeds they sound mean. At wide open throttle they sound like an animal. I have heard Mustangs with Borla, Flowmaster, and even Magnaflow and they dont even come close to the SLP Loudmouths. If you have a stock GT and your planning to add some high performance goodies to your car, then the SLP Loudmouths are the perfect start. I paid about $340 for them, but I would have paid up to $600 for them I am so happy with this product. Americanmuscle.com and SLP are the best!

    David Barnes

    Helpful (2) (0)

  • 5/5

    May 26, 2010

    2010 GT w/ SLP

    Very loud when you step on it but I also passed a couple of police roadblocks with SLPs and they didn't say a word. It truly depends on how you drive. But even when it is quiet it really sound powerful and growly. I'm entirely satisfied with the sound, the delivery and how easy it was to install. I recommend this to any stang addict who'd like a muscle car tone.

    Malodorant

    Year: 2010 Model: GT

    Helpful (30) (1)

  • 5/5

    May 28, 2010

    SLP 2008 GT

    After doing extensive research into what axle back exhaust to get I finally decided on the SLP Loudmouths. This Truly brings out the sound of your V8. Not to say the stock mufflers were bad, but after hearing these things, I don't think I will ever go back. Before it purred, now it spits and pops. Once things heat up it really isn't obnoxiously loud. You can hear it faintly as you cruise down the road, but put your foot into it and watch out! You will not forget they are there! Install was easy. I didn't even have to jack the car up. It might be slightly easier if you do but it's not required. You will notice it is easier to put the SLPs on than it is to take the stock ones off. Alignment can be a little tricky. Make sure you don't tighten everything but rather have it lose so you can position things correctly the first time through. Steve McQueen would be proud of these!

    Douglas Kirk

    Year: 2008 Model: GT

    Helpful (32) (3)

  • 5/5

    April 27, 2010

    2007 Shelby GT500

    I hesitated buying these because I thought they would be to loud, but I'm glad I got them. Not only is the sound just awesome, but it's not obnixious loud like I originally thought. Don't get me wrong they are loud but it's not to much. Chances are if your looking for an exhaust you trying to increase the sound and this is the one you need. Very raspy deep tone and I can tell you first hand it will turn heads. This exhaust will transform the attitude of your ride. Installation was a breeze, however it does take a little bit of time to get them just right.

    JohnH

    Year: 2007 Model: GT

    Helpful (42) (6)

  • 5/5

    May 12, 2009

    Beast Maker

    Hands down a fast way to make your Stang sound like a Stallion on Roids. Order it on the 11th got it on the 12th. Forty five minutes later i am making ricers cry.

    Gene

    Helpful (25) (4)

  • 4/5

    August 04, 2010

    2010 Mustang GT

    Just finished installing my Loudmouths. Installation took a little longer than anticipated because a couple of the exhaust hanger bolts were apparently crossthreaded from the factory. When I went to back the bolts out they were binding and I knew they were crossthreaded. Upon reinstallation of the bolts, they would spin out and could not be torqued down tightly. If this happens to you, a little Loctite Thread Locker will fix the problem. You may also need to grind a quarter to half inch off of the driver side exhaust tip hanger rod. The rod is a little long and will touch the rear bumber frame thus preventing the proper extension of the tip through the rear plastic fender exhaust cutout. Delivery was lightning quick - ordered them on a Sunday and received them Tuesday afternoon! The Loudmouths sound great !

    Joe

    Year: 2010 Model: GT

    Helpful (8) (4)

  • 5/5

    March 25, 2010

    The Exhaust from the MUSTANG GODS!!!

    If Jesus Christ had a Mustang these are what he would have on it! Amazing sound and LOOOOUUUUDDDDDD! You can hear me coming before you see me and when im gone its like i never left the parking lot!

    Adam DeWitt

    Helpful (17) (4)

  • 5/5

    Installation Time: Less than 1 Hour

    May 22, 2012

    OH-MY-GOD!!!

    At first i was hesitant about buying these, i thought they would be too loud inside the car and get annoying at times, but honestly, its not obnoxiously loud inside unless you have the windows down, and it has a great tone to it. I listened to so many youtube videos on this exhaust, but in real life it sounds 100 times better than any video can make it sound!

    nickm2007

    Year: 2007 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 New Jersey

    Helpful (8) (0)

  • 5/5

    August 22, 2010

    Perfect

    Just installed the loudmouth today. Had to wait eight days for shipping because I live in canada but it arrived hastle free. Install took around two hours for me, could be done in less for the experienced wrench man. It was easy and when I fired it up ohhhh man it sounds sweet. Just a note if your picky like me you should start with the drivers side first as it helps with alligning the fitting for the other side so they both stick out the exact length. Such a great product and really makes you feel like your driving a muscle car. Now I need more thanks AM

    Josh B

    Helpful (11) (3)

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