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

Customer Reviews (100+) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Afternoon

Installation Cost:0-$100

• Loudness / Volume 4.784314 4.8
• Exhaust Note 4.79085 4.8
• Fit & Finish 4.666667 4.7
• Bang For Your Buck 4.614379 4.6

• 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 Submodel: GT

  Helpful (42) Thanks for your input!
• 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 Submodel: GT

  Helpful (32) Thanks for your input!
• 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 Submodel: GT

  Helpful (30) Thanks for your input!
• 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) Thanks for your input!
• 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) Thanks for your input!
• 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) Thanks for your input!
• 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 Submodel: GT New Jersey

  Helpful (8) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 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 Submodel: GT

  Helpful (8) Thanks for your input!
• 5/5

  Installation Time: Less than 1 Hour

  September 21, 2011

  This product has a great sound.

  The SLP Loud Mouth exhaust has a great sound if you like the old school muscle car sound. The install was easy and the fit and finish was excellent but I highly suggest the following the instructions and not tightening everything up till last for adjustments.

  Mixer72

  Year: 2007 Submodel: GT Charlotte, NC

  Helpful (5) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 4

    4
• 3/5

  April 17, 2010

  Not what you think

  These are not an exhaust system. These are nothing more than straight pipes with no muffler. Do they sound good? Of course they do, its a mustang with straight pipes. However, this is not near worth the price considering you can have the same thing done and any muffler shop for the price of $20 stainless tips and about $50 straight pipe and labor. Good quality, great sound, WAY to expensive for what you get.

  Rick

  Helpful (5) Thanks for your input!
• 5/5

  February 11, 2011

  05 Mustang GT

  Rsearched exhaust on this website for many months and couldn't make up my mind...finally i pulled the trigger and bought SLP loudmouth and boy did i make the RIGHT choice...my Mustang sounds awesome...has the growl i was looking for...not to mention the amount of people who stop and stare as i go by...if you like attention this is the exhaust for you...easy to install...took about an hour....thanks american muscle...

  Joe V

  Year: 2005 Submodel: GT

  Helpful (4) Thanks for your input!
• 5/5

  Installation Time: Less than 1 Hour

  September 06, 2012

  Classic Mustang throaty Sound

  I just got my SLP loudmouths and I am very pleased. The fit and finish were top notch. Installation actually took me about 2 hours but that was because I was interrupted about 10 times during the install. The hardest part of the whole installation was getting the old mufflers off. Once installed, the magic begins. The sound is absolutely gorgeous. I was worried at first because of all the online videos make them sound terrible. I can say right now that these videos do NOT do any justice for these pipes. While I thought the price was a little steep, it is nowhere near as high as other brands. If you are budget minded and looking for that old school sound, then worry no more. Buy these axle back pipes. You will be glad that you did.

  Brice27332

  Year: 2007 Submodel: GT NC

  Helpful (3) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 4

    4
• 5/5

  Installation Time: Less than 1 Hour

  January 31, 2012

  Extremely easy installation.

  I listened to the online sound bites several times. I read most of the reviews and picked these exhaust pipes. The reviews were very helpful. I had to cut about an inch off the hanger on one side (as I had read in the reviews). I also followed anothers advice regarding connecting it all, but not tightening the clamps UNTIL I was satisfied with the alignment. GREAT PRODUCT, AWESOME SOUND ! I had a 2011 - 5.0 pull up beside me at a light and tell me that it sounded GREAT !

  JimmyJam

  Year: 2006 Submodel: GT South Carolina

  Helpful (3) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 4

    4

  • Bang for your Buck 5

    5
• 5/5

  June 15, 2011

  Everything I hoped they'd be

  I looked around a lot on youtube for sound clips of different axle backs and I finally decided on the SLP Loudmouths. Let me tell you, they sound INCREDIBLE! Definitely the best axle back out there. Install was very simple. Just unbolt the stock mufflers and the bolt up the slp's. The most difficult part would probably be reaching the bolts on the exhaust hangers. Other than that everything else was a piece of cake. Lining up the pipes were a little difficult too but it just takes some elbow grease and patience. The sound is deep and throating and at 3,500 rpm and up it sounds amazing! Drone isn't too bad but if you worry about drone then why are you getting a loud exhaust anyway? Overall this product was definitely worth the money! You wont be disappointed whatsoever. I know I wasn't. Next I'm going to get a Magnaflow catted x-pipe which will sound great. Hope this review helped!

  Mike Bruno

  Year: 2006 Submodel: GT

  Helpful (3) Thanks for your input!
• 5/5

  March 24, 2010

  Badass

  Awesome product. Very easy install and sound tough. Much better than flowmaster and borla. Worth the money for sure.

  Chad

  Helpful (3) Thanks for your input!
• 5/5

  March 20, 2010

  Lovin LOUD

  Well was not sure I wanted to go loud like Brick stated they would be. However I made the best choice by going with the SLP Loudmouth...it rocks the neighbors windows and my garage. Mate this up with the BBK 62mm throttle body and a Roush cold air intake..yeah this Stang turns heads and brings back the American spirit of pony power. If your ordering choose the 3 day shipping, it took seven days to get to Cali from PA.

  Jason G

  Helpful (3) Thanks for your input!
• 5/5

  March 09, 2010

  Amazing Exhaust

  Great exhaust,install was easy...didnt even have to jack up the car. Sound is amazing!!! the idle is nice and gurgly and once you hit 2-3k+ it is freakin awesome.

  Tony N

  Helpful (3) Thanks for your input!
• 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) Thanks for your input!
• 5/5

  July 21, 2011

  Best buy for your money

  Installed this last night on my 2010 GT and for two people who haven't played with exhaust systems before, it went pretty smooth. Had a little trouble lining up the driver side but passenger went smooth. The sound is amazing.

  Rich Siemienkowicz

  Year: 2010 Submodel: GT

  Helpful (2) Thanks for your input!
• 5/5

  February 28, 2011

  Great, however...

  This kit sounds great, don't get me wrong. In the lower gears/rpms it has an aggressive, deep growl that's not too loud, but definitely noticeable. However, if you are buying it strictly based off of the comparison video - DO SOME MORE RESEARCH FIRST!! From what I can find and based on my own experience, this kit sounds NOTHING like the exhaust in the video. Luckily, I liked the way it turned out. Install was very easy, no issues even for someone with zero mechanical experience.

  Kyle H

  Year: 2007 Submodel: GT

  Helpful (2) Thanks for your input!