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SLP Loudmouth Catback Exhaust (99-04 Cobra)

22 Reviews
Our Price

$575.95

  • Item #23005
  • MPN# M31006

  • Market Price $627.99
  • You Save 8% ($52.04)
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Customer Photos
Features
  • Rich, throaty exhaust tone
  • Loudmouth "shotgun" race resonators included
  • Versatile modular design
  • 2.5" 409 stainless steel tubing
  • 3.5" polished 304 stainless steel tips
  • Fits 1999 to 2004 SVT Cobra Mustangs
Description
More Power and Sound. This SLP system includes SLP's infamous Loudmouth "shotgun" race resonators that offer virtually no exhaust flow restrictions to free up more horsepower and to produce the most aggressive sound possible.

Modular Design.   SLP's unique modular design allows you to quickly and easily switch out the mufflers or resonators to suit your driving needs. Along with the included resonators, the Loud Mouth system is compatible with all SLP mufflers and resonators including the bullet-type Loud Mouth II and the traditional-style PowerFlo Muffler.

Superior SLP Construction. This SLP Catback system is made from mandrel bent 2.5" 409 stainless steel tubing for its excellent non-restrictive flow characteristics and long life. The system ends with a brightly polished 304 stainless steel 3.5" tips, that are electro-marked with the distinctive SLP logo, giving a great finishing touch and a show quality look.

Application. Designed to be a direct bolt on, this SLP Loudmouth catback will bolt straight up to the factory Mid-Pipe without any modifications required on the 1999 to 2004 IRS equipped SVT Cobra Mustangs to give it a rich, throaty sound.

Fitment: 1999 2001 2003 2004 Details

Won't fit? Add an exception

What's in the Box
Hardware included:
  • (8) 2.5" exhaust clamps
Installation Info
Tech Specs
Catback Exhaust Specifications
Piping Material: 409 Stainless Steel Tip Material : Polished 304 Stainless Steel
Piping Size: 2.5" Tip Size: 3.5"
Muffler Type: Straight-through Fitment: 1999-2004 Cobra Mustangs
Will it fit my Mustang?
  • Cobra - 99, 01, 03, 04

Most Helpful Reviews

5/5
SLP LOUDMOUTH

I have an '03 cobra with 25,000 miles. The stock exaust was good, but I was looking for more of a rumble and the slp took care of that. Removal and install took about an hour in my driveway. Now my cobra ...

Read More
Helpful (5)

4/5
Do You Like Loud?

I put this "Loudmouth" exhaust on in place of my Flowmaster cat back system along with SLP's X-Pipe, and all I can say is "WOW" is this loud!!. You really notice the difference during acceleration and ...

Read More
Helpful (3)

Read All 22 Reviews
Overall Rating 4.9 out of 5 stars

Customer Photos (7) View All Photos

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2 Questions / 5 Answers

Ask a Question

Does this come with everything I need to install? Do I need any extra hangers or clamps or anything else with this system?

styles Year: 1999 Model: Cobra

  • No extra clamps or hangers needed. Bolts right up in about an hour to an hour and a half. Just fit it together and clamp it down with the clamps that are included.

    Best Answer

    Cobraman88 Year: 2001 Model: Cobra

    Good Answer (1)

Show 2 more answers Question Resolved

Do I have to install the resonators? Can I just leave out the resonators on this catback system so I can get more of a louder and throaty sound to this exhaust system?

JGSVTCobra Year: 1999 Model: Cobra

  • Trust me you'll want to install the resonators with the kit for the best sound and fitment.

    03cobraowner Year: 2003 Model: Cobra

    Good Answer (0)

Show 1 more answer Question Resolved

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Customer Reviews (22) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Less than 1 Hour

  • Loudness / Volume 4.833333 4.8
  • Exhaust Note 5 5
  • Fit & Finish 4.583333 4.6
  • Bang For Your Buck 4.5 4.5



  • 5/5

    May 19, 2010

    SLP LOUDMOUTH

    I have an '03 cobra with 25,000 miles. The stock exaust was good, but I was looking for more of a rumble and the slp took care of that. Removal and install took about an hour in my driveway. Now my cobra sounds like a mustang should. LOUD.

    Dave

    Year: 2003

    Helpful (5) (0)

  • 4/5

    September 25, 2010

    Do You Like Loud?

    I put this "Loudmouth" exhaust on in place of my Flowmaster cat back system along with SLP's X-Pipe, and all I can say is "WOW" is this loud!!. You really notice the difference during acceleration and even when the car is at idle. I did notice it took away some top end, but the car may need to be re-tuned...A+ to AM for fast shipping to my doorstep!

    Mike Moyer

    Driving Style: Show

    Helpful (3) (0)

  • 4/5

    September 01, 2009

    Great exhaust

    Some pieces required a bit of pressure to get them to go together,but great sound and hp gains.

    Jake

    Helpful (2) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    July 28, 2014

    SLP LM1 cat back

    This cat back installed very easily. I paired this cat back with a bassani off road x pipe. Incredibly loud and I love every bit of it. Shipping was very fast. No complaints.

    EdShep

    Year: 2001 Model: Cobra Driving Style: Daily Driver 'Stangs I have owned: 1 Columbus, OH, USA

    Helpful (1) (0)

  • 5/5

    November 23, 2010

    slp

    this is the best sounding and best performing exhaust i have ever had and i own three mustangs easy install

    blake

    Driving Style: Street / Strip

    Helpful (2) (1)

  • 5/5

    June 30, 2010

    04 COBRA

    I can compare this cat back system to most of the other cat back systems that I have personally used. (minus Borla Stingers). Install 35 min on a lift (and the stock cat back can be fully retained and saved) I had no issue with fitmint; straight forward and simple install. Im running stock headers, Magna flow high flow X-pipe with this catback. I wanted LOUD and my setup delivers hands down...A+ product and a shout to AM for quick delivery

    PETE

    Year: 2004

    Helpful (3) (2)

  • 5/5

    June 11, 2009

    VERY loud!

    I have a 2003 Cobra with BBK long tubes and BBK short off road x pipe. Then I installed this system and man is it great. Probably the loudest system out there and noticable hp gains. Bottom line LOUD, great hp for the money and easy to install

    Matt

    Year: 2003

    Helpful (2) (1)

  • 5/5

    August 05, 2008

    Great Product

    Installed with SLP catted X on my 03 Cobra. Simple install and GREAT sound. Excellent power for the money. DO NOT PURCHASE if you want a quiet system. I have an 01 GT with off road H and Flows and this system is louder!

    Jeramie

    Year: 2003 Model: Cobra

    Helpful (1) (0)

  • 4/5

    Installation Time: Less than 1 Hour

    January 06, 2015

    tips and mufflers look great rest not quite as clean looking

    Loudmouth sounds great! Installation was easy. Mufflers and tips look great, the rest of the pipes look generic, not stainless steel. Thought it was all stainless steel like the MagnaFlow system. But sounds great and love the sound!

    svtoz

    Year: 2003 Model: Cobra Driving Style: Show 'Stangs I have owned: 3 Riverside, CA, USA

    Helpful (0) (0)

  • 5/5

    Installation Time: Afternoon

    March 17, 2014

    SLP catback, MAC catless prochamber

    I installed the SLP catback with my MAC prochamber to change the sound a little from the rest of the pack and wow i got the loud aggressive rumble and pop I want yet can idle the car down and still pass the cops! Only a 5/8 socket on 1/2 in. drive ratchet and a 15 mm combo to install!!! Thumbs up AM!

    03cobraowner

    Year: 2003 Model: Cobra Driving Style: Street / Strip 'Stangs I have owned: 1 Rochelle

    Helpful (0) (0)

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