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SLP

SLP M31007 1999-2004 Mustang GT / Mach 1 LoudMouth Exhaust System

    • Based on 19 reviews
Condition: New
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$602.31 Why this price?
Save $27.68 was $629.99

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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

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Availability: Only 3 left in stock, order soon!
Fulfilled by PStuning
Arrives Wednesday, Nov 27
Order within 11 hours and 17 minutes
Available payment plans shown during checkout

Features

  • Fits any 1999-2004 Mustang GT or Mach 1
  • Includes SLP's infamous Loud Mouth resonators for virtually zero flow restriction and the meanest sound around
  • Dyno-proven to out-perform competitive resonator-type exhausts
  • Features show-quality polished resonators and 3.5" double-wall tips

Description

SLP's Mustang Loud Mouth has always been the best performing cat-back exhaust in the business. Now it's the most versatile, too. Using groundbreaking modular technology first seen on our Mustang X-pipes, we've developed a system that can be quickly reconfigured to fit changing performance, noise level, and sound quality requirements. Simply loosen a few band clamps, swap muffler types, re-tighten, and you're done. No other system offers this level of performance and adaptability.

Manufacturer: ‎SLP


Brand: ‎SLP


Item Weight: ‎50 pounds


Product Dimensions: ‎35 x 18 x 17 inches


Item model number: ‎M31007


Is Discontinued By Manufacturer: ‎No


Manufacturer Part Number: ‎M31007


OEM Part Number: ‎M31007


Date First Available: November 6, 2009


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Nov 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great item
Product as described. Fit on my 2004 Mustang GT and it sounds perfect. JEGS was a great seller to work with and their customer service was exceptional.
Reviewed in the United States on October 19, 2015 by Grayson
    • Wouldn’t recommend
Bought and installed per the instructions. The couplers that connect are not the best. Lost one side 1/2 back and they don’t offer replacement parts. Complete waste of money
Reviewed in the United States on January 1, 2023 by Felix
    • Made my son's car sound like a dragster
Put 'em on my son's '99 MGT and was very impressed with the sound and performance. Very easy to install.
Reviewed in the United States on March 29, 2013 by LedEx
    • Five Stars
It made my mach 1 more fun to drive.
Reviewed in the United States on December 30, 2016 by van stricklin
    • Box was broken and came with most of the parts missing
Review Image by Mike F. Mike F.
Review Image by Mike F. Mike F.
Box came broken and missing most of the parts
Reviewed in the United States on March 26, 2022 by Mike F. Mike F.
    • A must for 99-04 mustangs !
The media could not be loaded. Sounds amazing on my 01 gt and crackles and pops when down shifting but I do also have a x pipe and long tube headers
Reviewed in the United States on August 16, 2019 by Dustin B.
    • Sent two different sized pipes.
I received the package and was excited to install it until I set it up and saw that one of the pieces is 2-3 inches longer than the piece on the other side. The pipes were also dirty on the inside and scratched up. Your better off spending the extra $40-50 on the actual slp website if you want your exhaust to show up correct and in brand new condition. ... show more
Reviewed in the United States on September 21, 2022 by ryan

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