Customer Reviews (100+) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Afternoon

Installation Cost:$100-$250

• Loudness / Volume 4.759162 4.8
• Exhaust Note 4.806283 4.8
• Fit & Finish 4.837697 4.8
• Bang For Your Buck 4.748691 4.7

• 5/5

  Installation Time: Afternoon

  December 19, 2018

  SLP Loudmouth 1 - Everything I expected

  I wanted to upgrade the stock exhaust and after doing tons of research I decided to purchase the SLP Loudmouth 1. The sound is great. I wanted something louder but not too loud and with the stock cats, just what I wanted. Later I'll do other upgrades to make it even louder. Installing was not too difficult. I had to mess with the alignment but other than that it was pretty straight forward. Highly recommend.

  Eli

  Year: 2002 Submodel: GT

  Helpful (4) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Afternoon

  December 17, 2018

  Great MFing product

  This product is bangin loud and easy to install if your an experienced mechanic as myself. The best exhaust on the market, no problems putting in. Solid product.

  BrentS

  Year: 2002 Submodel: GT

  Helpful (2) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Less than 1 Hour

  December 04, 2018

  SlP Review

  Great sounding exhuast best one you can buy for a decent price!

  JaimeF

  Year: 2002 Submodel: GT

  Helpful (2) Thanks for your input!

  • Loudness (Volume) 4

    4

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 4

    4
• 5/5

  Installation Time: Less than 1 Hour

  November 09, 2018

  SLP LM1

  Greatest addition to my already monsterous set up. Kooks Long Tube Headers, Kooks Catted X Pipe and then the SLP LM1

  MikeM

  Year: 2002 Submodel: GT

  Helpful (3) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Afternoon

  November 02, 2018

  Loudmouth describes it

  Exhaust sound mean down low and rips your heart out 3k rpms. Sounds super aggressive when accelerating and is nice and mild when calming cruising down the highway. I installed with the stock catted mid pipe and the combo is perfect. You can be super loud when you want and tame when driving like grandma. I eventually plan to do the off-road x pipe also because im an obnoxious 20 year old:)

  BlakeM

  Year: 2002 Submodel: GT

  Helpful (4) Thanks for your input!

  • Loudness (Volume) 4

    4

  • Exhaust Note 4

    4

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Afternoon

  October 25, 2018

  Loud Proud

  Great craftsmanship easy to install even with no lift. I would give 5 stars.

  John

  Year: 1999 Submodel: GT

  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: Afternoon

  October 11, 2018

  Easy

  It was easy to install. Only took a couple hours doing it by myself in the garage with hand tools. I had to use a couple extra jack stands to hold everything while I bolted everything. Overall great sound over stock.

  JeremyV

  Year: 2001 Submodel: GT

  Helpful (3) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 4

    4

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 4/5

  Installation Time: Afternoon

  October 04, 2018

  Good quality, unique sound

  Lets start with fit and finish. I had to replace my pype bombs after my car rolled into a fire hydrant. The SLP fit much, much nicer and the 2 piece over the axle makes installation a breeze. The resonators (2 1/2 inch pipe ending inside larger pipe, no baffles or anything whatsoever) are polished and the tips are just sexy. Now for sound, this is definitely different from most exhausts. I also installed an offroad h pipe at the same time. If youre very gentle on the loud pedal and keep it under 2k its quiet. In fact, constant speed cruising its almost silent. But you give her the beans, and its like the devils orchestra starts playing. Sooo loud and angry, clear from 2k to redline. You better look for cops close before getting into it. And neighbors? Yeah, they now hate you for certain. And if there was a sound clip in the dictionary under "raspy", this would be it. It resonates really effin loud at certain rpms. On decel, she pops and gurgles, and at some rpms is almost as loud as when youre on it. If youre looking for the loudest, raspiest, rawest exhaust sound possible, look no further. Its not for everyone, and the second i get a noise ticket ill be switching to lm2s or installing cats. Lol.

  TrestonH

  Year: 2002 Submodel: GT

  Helpful (6) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 4

    4

  • Fit & Finish 5

    5

  • Bang for your Buck 3

    3
• 5/5

  Installation Time: Less than 1 Hour

  October 04, 2018

  SLP loudmouth

  Replaced my Borla system with the SLP and love it. Not that the Borla was a bad system by any means but the SLP has a deeper base note and more rumble/crackle which I like. Not overly loud at idle, nice purr out on the highway yet balls loud when u get on it a win win all the way around with the Loudmouth.

  MarkD

  Year: 2004 Submodel: GT

  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

  October 01, 2018

  Loud

  Adds plenty of volume for a low price, best purchase so far!!

  BKC15

  Year: 2003 Submodel: Mach 1

  Helpful (3) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Afternoon

  September 25, 2018

  loud

  very loud if you are looking for for loud exhaust.

  NasserT

  Year: 2001 Submodel: GT

  Helpful (3) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 4

    4

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Shop Install

  Installation Cost: $100-$250

  September 23, 2018

  GREAT SOUND...

  THEY ARE GREAT...I HAVE BETTER GAS MILEAGE...BETTER ACCELERATION...

  KenW

  Year: 2003 Submodel: GT

  Helpful (3) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Shop Install

  Installation Cost: $250-$500

  September 20, 2018

  Release the beast

  Hello to all you Mustang enthusiasts I was really excited about installing a loudmouth cat back exhaust and also included the catted SLP X pipe wow I have to say this the sound my car makes now incredible if you want to release the Grrrrr in your Mustang GT or Mach 1 I highly recommend the SLP exhaust systems they have to offer. Ride hard and loud! happy motoring .

  KenG

  Year: 2003 Submodel: GT

  Helpful (4) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Less than 1 Hour

  September 12, 2018

  SLP Loudmouth

  I'll get straight to the point. This is the best axle back exhaust setup for an 03-04 Mach 1 that I've ever experienced. No other brand can compare to the majestically powerful soundtrack these resonators create. To anyone who thinks that just this without an aftermarket X or H pipe isn't enough, save your money, trust me its loud enough. Had my favorite shop install them in 40 minutes no problem. The welds are fantastic and the SLP engraving on the tips adds a nice touch. Worth every penny. Just buy them. P.S.- To all other Mach 1 owners, it may just be me but on deceleration i get a good bit of crackles and pops. Sounds super cool. Stock headers and factory H pipe.(must be a 4 valve thing.)

  JordanB

  Year: 2003 Submodel: Mach 1

  Helpful (3) Thanks for your input!

  • Loudness (Volume) 4

    4

  • Exhaust Note 5

    5

  • Fit & Finish 4

    4

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Afternoon

  September 12, 2018

  Surpassed Expectations!!!

  My first car was a black 2000 V6 mustang and all I can remember is visioning the day I would own a GT. 6 years down the road I finally turned that vision into a reality. After finally purchasing my dream car, a stock 2002 Black Mustang GT, it was time for me to begin purchasing all the parts I've added to my wishlist in preparation of this day. After going on Youtube and listening to a variety of exhaust clips I stumbled upon Chris Fix's video where he installed the Slp LM1 and SLP catted x-pipe on his Mustang. THIS WAS THE ONE. Although a bit pricey for someone who is in college it was a must, I ordered it and patiently waited for it to arrive in the mail. After receiving the exhaust I unboxed it... I was in disbelief.. This was going to be the first modification done to my GT. I got the car up in the air, took another look at Chris Fix's installation method and immediately got to work. Keep in mind I only had access to a floor jack, ramps, jack stands, and an abandoned carwash. I installed the cat-back by myself which in turn took me approximately 5 hours to do, with many breaks in between and no rushing, I finally had the last nut tightened down. The start up... I will not forget how excited I was and still am to this day hearing the burble of the exhaust at first start. 2000 rpm is the sweet spot to make a little noise but man at wide open throttle it is unlike anything else. If you're interested in seeing my install hop over to my Youtube channel (PeaceByPiece2V) and watch the install from start to finish to hear a comparison of the stock exhaust vs. the catback. This exhaust will do nothing more than make you smile ear to ear every time you put your foot on the gas.

  SeanL

  Year: 2002 Submodel: GT

  Helpful (4) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Afternoon

  September 10, 2018

  Slp catback

  The SLP loudmouth catback sounds amazing on my 2003 gt. I highly recommend this set up for someone doesn’t want to spend the money on an 800 dollar exhaust. Over all it only took a little over an hour to install which was fairly easy. As much as I love the 3.5 inch exhaust tips, I do wish they were capable to stick out past the bumper a bit further. Over all I am very pleased!

  BryceH

  Year: 2003 Submodel: GT

  Helpful (4) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 4

    4

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Shop Install

  Installation Cost: $250-$500

  August 29, 2018

  SLP Loudmouth

  Wow! Really diggin the sound this exhaust makes. I'd rather listen to it than my stereo. The guys at AM are very helpful. Appreciate all of you. Will definitely continue to Mod my Mustang, with AM staff guidance. Thank you

  RommelK

  Year: 2001 Submodel: GT

  Helpful (4) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 4

    4

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Less than 1 Hour

  August 28, 2018

  Slp loudmouth cat-back

  This exhaust system is freakin awesome!!!! Gives my pony a unique throaty sound that is just out of this world!!! Not to loud when just cruising but man-o-man when you hammer down on it does it come alive and to note, it's not a annoying loud but it's loud enough to turns heads!! Thanks A.M.

  ChadB

  Year: 2004 Submodel: GT

  Helpful (2) Thanks for your input!

  • Loudness (Volume) 4

    4

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Afternoon

  August 13, 2018

  Very impressed

  Not the simplest to install if u don’t have a lift but that’s with anything but patience and attention to detail is well worth it... it is loud and aggressive and a real head turner... I’ve gotten so many compliments in just a short time... well with the money

  Gavin

  Year: 2000 Submodel: GT

  Helpful (6) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 4

    4

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Shop Install

  Installation Cost: 0-$100

  August 08, 2018

  Lm1 off the chain

  These LM1 are just what I was looking for boy do they make my mustang come alive it's very lound going threw the gears boy o boy man o man never go back to flowmaster

  GregoryG

  Year: 2003 Submodel: GT

  Helpful (4) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5