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SLP Loudmouth Center/Center Shotgun Style Resonators - 2.5 in. - Pair (79-04 All)

Market Price $174.95 You Save 6% ($10.00)
Our Price

$164.95

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  • Item 23032
  • MPN# 31062

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Features & Details

  • Loud Aggressive Sound
  • Virtually No Restrictions for More Horsepower
  • Designed for SLP Modular Cat-Backs
  • 2.5" Inlet/Outlet Diameter
  • Hand-Polished 304 Stainless Steel
  • Sold as a Set of Two
More Power and Sound.   These SLP Loudmouth "shotgun" race resonators are designed to have virtually no exhaust flow restrictions to free up more power and to produce the most aggressive sound possible.

SLP Modular Design. SLP manufactures their Mustang catback exhaust systems with a unique modular design that allows you to easily and quickly swap out the included mufflers with any of the other SLP mufflers or resonators they make to suit your driving needs.

High Quality Construction.   The Loudmouth "shotgun" resonators are constructed from hand-polished 304 stainless steel and are embossed with the classic SLP logo. They have a high flow design and measure in at 2.5" ID/OD, 4.5" Body Diameter, and a 18-3/16" Overall Length.

Application. These SLP Loudmouth Resonators are designed to easily replace the existing mufflers or resonators in any of SLP's 1979 to 2004 Mustang Cat-Back exhaust systems. The may also be used in the fabrication of custom exhaust systems.

Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

What's in the Box
Hardware included:
  • None - reuses stock hardware
Installation Info
Tech Specs
Measurements:
  • 2.5" ID/OD
  • 4.5" Body Diameter
  • 18-3/16" Overall Length
Will it fit my Mustang?
  • Bullitt - 01
  • Foxbody - 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • Mach 1 - 03, 04
  • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04
  • Cobra - 94, 95, 96, 97, 98, 99, 01, 03, 04
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

People Who Bought This Item Also Bought

Most Helpful Reviews

5/5
replaced my flowmasters

i had flowmasters on my car before i put these in. after the install, i get nothing but compliments from people around me. i have it set up with the bbk shortys and pypes O/R x pype. definately turns heads ...

Read More
Helpful (24)

5/5
SLP or SUPER LOUD PERFORMANCE

i bought the slp LM1's. I had flowmaster 40's on my mustang bullitt and they only made noise at about 1950-2200 RPM, these are loud from idle to 6 grand! i lovve them and would recommend them to anybody ...

Read More
Helpful (15)

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

Customer Photos (36) Submit Your Photo

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50 Questions / 8 Answers

Ask a Question

Bone stock exhaust I have a bone stock exhaust. I do not have the money to buy a whole catback exhaust and have it installed. So I was wondering if getting these will make enough difference in sound on a stock catback or is it a pointless buy?

stangnoob

  • It would not by any means be pointless, replacement of your stock mufflers is always a plus for performance. However if you do not have the equipment, you would still need to take these to a muffler shop to have them cut away the stock mufflers and replace them with these but if you check around you should be able to get these installed for no more than $100 bucks, and it will sound just as good as buying the setup that bolts from the mid-pipe back. I have the SLP setup and I love it, FYI. I will not go back to flow master after experiencing the sound these babies put out.

    Sniper86

Show 3 more answers Helpful (8)

Is this product acceptable in Canada? I live in the Province of Ontario.' Thank you

SpyroP

  • Due to many different restrictions and regulation from place to place it would be difficult to determine if these SLP Loudmouth Center/Center Shotgun Style Resonators are acceptable in your area. We would highly recommend speaking to your local municipality and inspection station for specific details.

    AMJEFF

Helpful (0)

Hi I have a 89 notch would the slp fit with my bbk longtube with catted x pipe ?

RolandH

  • The SLP Loudmouth Center/Center Shotgun Style Resonators will fit on your 89 Mustang.

    VincentV

Helpful (0)

I have a 2000 mustang gt with a supercharged 4.6. will the slp loud mouth 1 work okay with a supercharger?

MikeH

  • The SLP Loudmouth Resonators will still work on a car with a supercharger.

    Pat K

Helpful (0)

My mufflers have been welded onto my current exhaust and wanted to know if anyone has been successful in installing these resonators by just cutting off the old mufflers with a sawzall or angle grinder?

GlobberStomper

  • The mufflers are placed on an angle, so if you were to just cut off the original mufflers, they would not install without an angled piece to finish connecting the exhaust.

    AMJEFF

Helpful (0)

I have an off-road true dual setup running the pypes m80 bullet mufflers and there is a bit of a sputter noise when I'm coasting down. Went to a couple shops and they said I need more backpressure because my 3.8l v6 can't handle that much flow. I'm just wondering if these resonators and the pypes m80 mufflers are a conflicting combo? Don't want to dump a bunch of money into it if they are going to clash. Thank you

thrashed

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Customer Reviews (100+) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Full Day

Installation Cost:0-$100

  • Loudness / Volume 4.794872 4.8
  • Exhaust Note 4.786325 4.8
  • Fit & Finish 4.854701 4.9
  • Bang For Your Buck 4.769231 4.8



  • 5/5

    October 18, 2010

    replaced my flowmasters

    i had flowmasters on my car before i put these in. after the install, i get nothing but compliments from people around me. i have it set up with the bbk shortys and pypes O/R x pype. definately turns heads before they even see me coming! LOVE this product!! has the perfect sound for american muscle cars

    Jonathan

    Helpful (24)

  • 5/5

    December 15, 2010

    SLP or SUPER LOUD PERFORMANCE

    i bought the slp LM1's. I had flowmaster 40's on my mustang bullitt and they only made noise at about 1950-2200 RPM, these are loud from idle to 6 grand! i lovve them and would recommend them to anybody who owns a v8 mustang. of course though, keep your foot off the gas going by cops!

    Cody

    Year: 1995

    Helpful (15)

  • 5/5

    July 26, 2009

    Head Turner!

    I use to use nothing but Flowmasters on my Mustangs. I made the change to these baby's on my Mach 1 and it came to life! it will turn heads where ever you go!

    Bryan

    Helpful (14)

  • 5/5

    September 20, 2010

    lm1s are amazing

    amazing sound, cheap price.. Best buy..

    Adam

    Helpful (12)

  • 5/5

    May 08, 2010

    slp 01 gt

    Just the sound I was looking for and for a good price

    Jason

    Year: 2001 Submodel: GT

    Helpful (12)

  • 5/5

    April 19, 2010

    love them

    sounds very nice on my stang...love 'em.... Thanks Am! you guys rock!

    Dwayne

    Helpful (12)

  • 5/5

    August 08, 2010

    AMAZING!!!

    This changed my car from a normal road car to an all out drag car! It's much louder than just a normal cat-back and when you get n the high revs it really sounds great! With in an hour of putting these on I got a tone of looks and one guy even pulled up next to me and said "dosnt sound like a cheap one!" and gave me a thumbs up! These are a must for an mustang owner!!!

    Kyle

    Helpful (11)

  • 4/5

    June 20, 2010

    SLP loudmouth 03 Mach 1

    Just got these and had them installed on my 03 Mach 1. Had them welded on at a local Midas shop. Besides the SLP, everything on the exhaust was stock. Sounds great and aggressive. Very pleased.

    CJ

    Year: 2003

    Helpful (10)

  • 5/5

    May 08, 2010

    amazing buy

    Amazing product for an amazing price. I am using them with lt headers and o/r h pipe, and the result is incredible. great tone at low speeds, and great clarity at wot. i would suggest these to anyone. a breeze to install

    Anthony

    Helpful (10)

  • 5/5

    December 09, 2008

    Sound that turns heads

    I have a budget, so I decided to buy these and install them for under $300. When I did - Heaven shed a tear. Its loud, powerful sound irrupted and now my 03 GT stands out. I love being at the Gas station, firing it up, and just smiling as innocent bystanders watch me drive away.

    CK

    Year: 2003 Submodel: GT

    Helpful (9)

  • 5/5

    August 19, 2010

    ABSOLUTLY AMAZING

    These are the best mufflers you can put on your car for sound and power!!! however I must warn manuel drivers you will get much worse gas milage not because they affect the car but beccause you will crave the sound when you hit 6grand!!! Best! Best BEST EXHAUST mod you can do!!!

    Kyle

    Helpful (8)

  • 5/5

    May 06, 2011

    Sounds awesome!

    I have these pairs of slp loudmouth resonator mufflers with an o/r h pipe and it sounds just perfect. It has an aggressive tone with a rich deep throaty sound and just a bit raspy. This is the sound I always wanted and I got it with the slp loudmouth mufflers. Was very happy with the price and installation was fairly easy.

    Marino

    Year: 1991 Submodel: GT

    Helpful (7)

  • 5/5

    April 21, 2010

    If jesus made a muffler

    Its a little tricky to install, but omg when you do; you wont regret it. My mustang has a rich sound, not like a ugly straight headers. I like how you can really hear the cam when it idles. Five Stars.

    Trevor

    Helpful (7)

  • 5/5

    November 19, 2009

    1998 GT

    This is truly something amazing!!! Had them installed with a MAC o/r H-pipe no cats and WOW!! you won't be disappointed I promise. Besides the resonators and the h-pipe the car is completely stock. Basically straight piping though

    Jonathan Romero

    Year: 1998 Submodel: GT

    Helpful (6)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    April 10, 2013

    amazing sound

    I had the flow master 40s with a stock H, it was too quiet for my taste so i switch the flows for the lm1 that a muffler shop welded on for 60 bucks, as soon as I started the car you can hear a difference much more throtty the way a mustang is or any muscle car is suppose to sound, lm1 are definitely for the people who like the loud muscle car sound if you think its too loud then your driving the wrong cat better drice a hybrid

    Dj2887

    Year: 2003 Submodel: GT Edinburg, TX, USA

    Helpful (4)

  • 5/5

    Installation Time: Less than 1 Hour

    September 21, 2011

    Amazing Sound and Performance, Excellent Price!

    Ordered them on a Wednesday night, and got them by Saturday morning. Crazy loud and unbelievable exhaust note. Works extremely well with an O/R X-Pipe.

    02stanginangelo

    Year: 2002 Submodel: GT San Angelo, Texas

    Helpful (4)

  • 5/5

    March 21, 2011

    SLP 1 Resonators

    I just had these resonators installed to replace the stock mufflers. I still have the stock manifolds and stock h-pipe with the 6 cats. After doing a ton of research and living in a emissions sensitive state (MD) I was really excited to put these SLP's on my 1996 GT. After having them installed by an exhaust shop, I couldn't wait to turn the key! And then..... Where's the sound? They were only slightly and I mean slightly louder than stock. It looks like the 6 cats are working overtime to keep the exhaust note down. Rats!

    Darin

    Year: 1996 Submodel: GT

    Helpful (4)

  • 4/5

    July 16, 2010

    Sounds wicked good

    Ordered these and custom fit them to my 2004 Mustang GT. All other exhaust is stock. Sounds excellent deep throaty sound. NOTE: these resonators are shipped in 2.5" diameter. Stock Mustang exhaust is 2.25" diameter. You will need to purchase increasers.

    Shamus

    Year: 2004 Submodel: GT

    Helpful (4)

  • 5/5

    June 25, 2008

    02 GT

    I have these mufflers paired with an o/r x pipe. this is the single loudest setup I have ever heard on a Mustang. It has a very mean sound.

    alan boyle

    Year: 2002 Submodel: GT

    Helpful (4)

  • 5/5

    January 26, 2011

    Stay with flowmasters!

    I blew $200 damn dollars swapping these mufflers out! Slp's with an off road x pipe is too damn loud for street use! Reinstalled my Flo's the same day! If u have flo's keep them on! Thanks

    SLP hater

    Helpful (3)

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