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SLP Loudmouth Resonators - Pair (79-04 All)

100+ Reviews
Our Price

$148.95

  • Item #23032
  • MPN# 31062

  • Market Price $154.95
  • You Save 4% ($6.00)
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Customer Photos
Features
  • 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
Description
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

Most Helpful Reviews

5/5
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.

Helpful (3)

5/5
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 ...

Read More
Helpful (4)

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

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31 Questions / 9 Answers

Ask a Question

Can these be fitted on a 99 v6 with a gt exhaust? My car is a 99 v6 with a gt exhaust equipped on it. Can i weld these on here? Thanks!

Patrick95

  • Absolutely. As long as you have dual exhaust with 2 mufflers, then you can have these welded on.

    SlvrGT

    Good Answer (1) (0)

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

What would happen of I welded these in and kept my stock mufflers in?

MattymagsOrlando

  • There would be no reason to keep your stock mufflers in. These replace the entire muffler for the exhaust system. If you left your stock mufflers in, you could possibly hurt your mustang's performance. The exhaust system is not designed to have 2 mufflers for each tailpipe. Just bring you SLP Loudmouth Resonators to any reputable mechanic shop and have them weld these in. They will know to remove the stock mufflers and your mustang will sound AMAZING!

    SlvrGT

    Good Answer (7) (0)

Show 2 more answers Question Resolved

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

    Good Answer (10) (0)

Show 3 more answers Question Resolved

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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 4.7875 4.8
  • Exhaust Note 4.8125 4.8
  • Fit & Finish 4.8125 4.8
  • Bang For Your Buck 4.75 4.8



  • 5/5

    July 27, 2016

    Absolutely worth It

    Totally worth the money, sounds beautiful, turns heads everywhere and get a lot of compliments

    CPTGadget

    Year: 1999 Model: GT 'Stangs I have owned: 2

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    July 03, 2016

    Extremely Loud

    I installed SLP lm1 with reonator cats deleted "straight pipes" and it was extremely loud. In1200RPM loud My Stang was stock only SR cold air intake and it's sounds like stroker.

    LOUDSTOCKSTANG

    Year: 2002 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    June 22, 2012

    Fate led me to these.

    So I had ordered the M80 mufflers because of the price point, yet once I placed the order I found out they were on backorder. Taking this as a sign of fate, I cancelled that order and placed a new one for these SLP's. BEST DECISION I'VE MADE HANDS DOWN. I was worried about them being overly loud, but their tone and volume are perfect. I had a shop install them for $60 and it took 20 minutes tops. I just had these welded into my 100% otherwise stock exhaust system and am so thrilled with how it makes my '01 cobra sound. BUY THEM!

    KennyO

    Year: 2001 Model: Cobra Driving Style: Daily Driver 'Stangs I have owned: 3

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    March 03, 2012

    Amazing Sound & Finish!

    For those whom are skeptical on purchasing these SLP's, no need to worry! The sound is amazing over previous Magnaflows. Setup on stock (4) catted, BBK X-pipe, SLP Resonators, not overly loud; and with an perfect down rev sound. For those of you thinking twice, look no further. Once they were installed, I simply could not keep a smile off my face as I drove for miles on end. I cannot wait to see how much better it would sound with an O/R setup. Just as always, American Muscle has been outstanding with their service, and received within one week time on the west coast. AM, look forward to seeing me again soon!

    Venomous

    Year: 2001 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Southern California

    Helpful (1) (0)

  • 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 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 1 San Angelo, Texas

    Helpful (3) (0)

  • 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 Model: GT Driving Style: Daily Driver

    Helpful (4) (0)

  • 4/5

    December 22, 2009

    2000 GT

    I put these on my 2000 gt. i have ford racing shortie headers, magnaflow o/r x-pipe, with loudmouths. i was expecting it to be too loud but they sound really good. the only time it is too loud is when you put the pedal to the floor. i have very pleased with the louthmouths! good buy! thanks AM

    RICHARD

    Year: 2000 Model: GT

    Helpful (1) (0)

  • 5/5

    November 19, 2009

    Slp resonators

    I had the flowmaster cat back system in b4 on my 02 GT but wanted something louder so I bought these and they are perfect! they sound Loud and mean! AM is the best when it comes to mustangs!

    Robert

    Year: 2002 Model: GT

    Helpful (2) (0)

  • 5/5

    February 17, 2009

    Sweet

    I had Flowmaster 40s with a dump on my 97 GT, and it sounded nice and all dont get me wrong, but I wanted something louder. Found it! I looked into Borla Stingers and Magnapacks, they were way too expensive. These Loudmouths sound just as good for a fraction of the price. They are the best!

    Kyle

    Year: 1997 Model: GT

    Helpful (1) (0)

  • 5/5

    February 02, 2009

    great

    swapped out my flowmasters for these, couldnt have been a better decision.

    jason

    Helpful (2) (0)

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