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SLP Loudmouth II Center/Center Bullet Style Mufflers - 2.5 in. - Pair (Universal Fitment)

Market Price $208.95 You Save 4% ($9.00)
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$199.95

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  • Item 23027
  • MPN# 31064

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    Features & Details

    • Rich, Throaty Exhaust Tone
    • Straight-Through Design for Superior Flow
    • Designed for SLP Modular Cat-Backs
    • 2.5" Inlet/Outlet Diameter
    • 304 Polished Stainless Steel Construction
    • Sold as a Set of Two
    • Universal Fitment; Modifications Will Be Required
    More Power and Sound. SLP's famous Loudmouth II "Bullet Style" race mufflers offer minimal restriction, increased horsepower and an aggressive throaty tone, that is only second to the Loudmouth "shotgun" race resonators for sound.

    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.

    Superior SLP Construction. The SLP Loud Mouth II "bullet" mufflers are constructed from high hand-polished 304 stainless steel with an embossed SLP logo for great looks, and feature a ceramic-wrapped, perforated core that reduces high-frequency noise and in-car resonance for a rich, throaty exhaust note.

    Modifications Required. This Muffler was designed to be used on mutliple applications, as it is not a direct fit replacement part. In order to install this Muffler properly on your vehicle, some modifications to the exhaust system will be required.

    Application. These SLP Loudmouth II Mufflers 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
    • Cobra - 93, 94, 95, 96, 97, 98, 99, 00, 01, 03, 04
    • Cobra R - 93, 95, 00
    • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04
    • LX - 87, 88, 89, 90, 91, 92, 93
    • Mach 1 - 03, 04
    • Other - 79, 80, 81, 82, 83, 84, 85, 86
    • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

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    Questions & Answers (18)

    5 Top Rated Questions

    Are these compatible with the Pypes True Dual Off-Road Exhaust? and whether or not it is or not, what would be the best v6 dual exhaust conversion kit to get both the hugest hp gains and be as loud as possible?

    • The SLP Loudmouth II Mufflers are 2.5" in diameter, and the Pypes True Dual Exhaust is also 2.5" in diameter, so it would fit together, depending on the location. If you were looking to replace these mufflers with the mufflers on the true dual exhaust, this would not work, due to the true dual exhaust mufflers having an offset inlet and outlet on the muffler itself. The true dual exhaust with the smallest mufflers and without catalytic converters will create the largest gains.

    Helpful (2)

    Best mufflers What would be the best sounding muffler for mustang gt ?? I want agressive sound , but not to much just driving around. Thanks

    • i would recommend the loud mouth resonators if you have the stock h pipe. thats what i had and it sounded pretty darn good. if you have an x pipe i recommend the loud mouth 2's which are actual mufflers.

    Helpful (1) Show 2 more answers

    My current setup on my 96 gt is stock headers, bassani o/r xpipe to the slp loudmouth 1 catback. Super loud and waaaay too raspy for my liking. Sounds "trumpety" if tht makes sense. My question is, will these LM 2 mufflers help make the tone less raspy? Or wut mufflers can you suggest to help facilitate a more muscle car (deeper tone) sound? Thanks

    • The loudmouth 2 mufflers would definitely tone down the exhaust a bit, however, you would still have that raspy tone due to the x-pipe.

    Helpful (0)

    Can this be welded/installed on a 2.25 diameter piping?

    • The 2.5" SLP Loudmouth II Center/Center Bullet Style Mufflers do not have a stepdown for 2.25" piping; and cannot be installed without modification.

    Helpful (0)

    I got a 91 gt..wich slp loudmouth would you guys consider?...i want my stang to make noise either on idle or on the road..thanks

    • The SLP Loudmouth II Bullet Style Mufflers will utilize a design similar to a glass pack muffler, using a sound deadening material behind a louvered panel to reduce exhaust noise vs open headers. The SLP Loudmouth Bullet Style Mufflers will have no sound deadening material, and will just be one open chamber, essentially acting as though no muffler was installed at all.

    Helpful (0)
    Post Your Question
    10 More Questions
    I have. 2012 v6 all stock, just muffler deletes, will the SLP II give me an aggressive tone, would it be worth it? 1 answer
    I have a 2003 Mach 1 everything is stock at this time. I would like the car to have a deep throaty sound. Something that Sounds good at idle and smooth at cruising speed but sounds mean when I get on the gas. All I will be changing at this time would be the muffler. Will the loudmouth 2 give me what I'm looking for? 1 answer
    SLP Loudmouth II or Pypes M80? Which one is louder? I'm only replacing the mufflers. Everything else will be stock. Thank you! 1 answer
    I have a friend with a 04 mustang gt and she wants the loudmouth || but her stock ones are welded on how can we put these on... 1 answer
    Would x-off road pipes with loud mouth ll make my v6 mustang loud ? 1 answer
    I have a 2002 v6 with flowmaster exaust. Can I put these loudmouth II mufflers on it to make it louder? It is worth it? 1 answer
    Are these compatible with UPR Products O/R X pipe (no cats) and will the sound scare old people? 1 answer
    What would be the best sounding muffler for 99-04 v6 mustang? 1 answer
    Can these mufflers simply be switched out with my stock 2003 mustang gt mufflers? 1 answer
    What's the difference between the mufflers and the resonators? 1 answer

    People Who Bought This Item Also Bought

    Customer Reviews (81) Write a Review

    Overall Rating 4.7

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:0-$100

    • Loudness / Volume 4.254546 4.3
    • Exhaust Note 4.563636 4.6
    • Fit & Finish 4.8 4.8
    • Bang For Your Buck 4.381818 4.4



    • 5/5

      Installation Time: Less than 1 Hour

      September 05, 2018

      They are fantastic

      this muffler pairs perfect with a BBK off road x pipe

      BaileyC

      Year: 2003 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      August 05, 2018

      Awsome

      Love how my car sounds! I now drive with a smile on my face it just sounds amazing!!

      Deegee

      Year: 2002 Submodel: V6

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      July 27, 2018

      Slp lm2

      These mufflers are great! Love the way they sound!!!

      DerrickW

      Year: 2004 Submodel: V6

      Helpful (0)

    • 4/5

      Installation Time: Afternoon

      June 17, 2018

      solid muffler

      sounds good, looks ok, just not happy it came in with scuffs and scratches i couldn't polish out, but other than that great

      calebh

      Year: 1979 Submodel: Cobra

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      April 19, 2018

      Slp ll

      These slp mufflers do not disappoint!!! Throwing them on with an x-pipe and your stang will sound vicious!!!!

      88fox

      Year: 1988 Submodel: GT

      Helpful (4)

    • 4/5

      Installation Time: Less than 1 Hour

      March 09, 2018

      Gilmore

      If you want loud it’s great sound get what you asked for lol I have a 04 cobra with kooks long tubes and pypes off road x no cats only change pypes mufflers and added slp mufflers more rumble and turns heads

      QuintariusG

      Year: 2004 Submodel: Cobra

      Helpful (3)

    • 5/5

      February 19, 2018

      Best sounding SLP

      I have the SLP loudmouth II Cat Back system on my 02 mustang and completely love it! Went with an H pipe instead of X. It has the perfect tone to it, not obnoxiously loud all through rpms. Great rumble at idle but when you get to your higher rpms this system really comes alive and sounds amazing! It's guaranteed to turn heads and you will have a lot of people tell you your car sounds great!

      Gabriel

      Year: 2002 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      February 05, 2018

      Awesome Pair of Mufflers!

      I have ran Loudmouth 1's for over a year and they are just LOUD all the time. I decided to swap them out for the Loudmouth 2's and I could not be happier. No where near as raspy but still give off a great sound and volume.

      Andrew03

      Year: 2003 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      December 30, 2017

      Slp loudmouth

      great sound I had the Restorator's first then I bought the loudmouth 1 and I love them pretty sure the neighbors love them also

      BrandonR

      Year: 2000 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      December 19, 2017

      Slp loudmouth IIs

      Love the sound and throttle response is way better with these mufflers. Fast shipping thank you american muscle team.

      97laserredgt

      Year: 1996 Submodel: Cobra

      Helpful (3)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      November 23, 2017

      Mustang

      Like the aggressive sound that it gives the car very happy with my purchase and fast shipping will be ordering more parts for both my mustangs

      Michael

      Year: 1992 Submodel: LX

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      October 06, 2017

      Cali sucks

      Gave my cobra better sound that is for sure and really recommend them but going thru 4 cats sucks

      Brian

      Year: 2003 Submodel: Cobra

      Helpful (5)

    • 5/5

      Installation Time: Less than 1 Hour

      September 25, 2017

      SLP Loudmouth

      Has a beautiful race growl sound. Not raspy at all which is what I like. With turn downs and just these mufflers and a cam you break necks easily.

      SamuelBall

      Year: 1991 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      September 03, 2017

      It sounds really good

      Bit loud sound but really loud with off road x pipes.

      Bader

      Year: 2004 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      August 29, 2017

      Perfect

      Ordered these mufflers to replace the Borlas that came on my '01 Bullitt GT. Man, am I happy I did. These mufflers are the perfect combo. Not too loud for normal day to day driving, but they will scream when you hit the gas hard. Very pleased with my purchase.

      PaulJ

      Year: 2001 Submodel: Bullitt

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      August 03, 2017

      SLP Loudmouth ll are just awesome

      The SPL Loudmouth ll muffers are top of the line. You get what you pay for. Perfect fit whit no problems.

      GOTMACH

      Year: 2004 Submodel: Mach 1

      Helpful (5)

    • 5/5

      Installation Time: Less than 1 Hour

      July 09, 2017

      Good swap from LM1

      Previously had LoudMouth 1, and they was way too raspy with my BBK catted Xpipe. Swapped With LoudMouth 2 much deeper exhaust note.

      Jon

      Year: 2004 Submodel: GT

      Helpful (4)

    • 4/5

      June 15, 2017

      Nice sound but a little too tame

      I had a shop install these. They sound really good. Nice growl with a pop here and there on decel, and a nice note when you open them up. There is a little bit of drone. While it's not too bad, it certainly makes the car a poor place for conversation. After about 4 months I got tired of them and upgraded to LM1s. If what you're after is volume, I don't recommend these. Lots of people told me they were loud, but it wasn't enough. I'm running stock headers, and an O/R H-pipe.

      Bryce

      Year: 2001 Submodel: GT

      Helpful (6)

    • 5/5

      Installation Time: Less than 1 Hour

      May 28, 2017

      Recommend

      These sound great put these on my 01 mustang an gets pretty loud love the sound

      JohnnyE

      Year: 2001 Submodel: V6

      Helpful (3)

    • 5/5

      May 27, 2017

      Love it

      Always been a fan of slp products. I have BBK shorties and catted x but wasn't loud enough with MagnaFlow. So I jumped to lm2's. Sounds amazing as always and more aggressive. Highly recommend

      BryanK

      Year: 1997 Submodel: GT

      Helpful (3)

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