


SLP 1999-2004 Ford Mustang 4.6L LoudMouth II Cat-Back Exhaust System
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
SLP 1999-2004 Ford Mustang 4.6L LoudMouth II Cat-Back Exhaust SystemSLP 1999 2004 Ford Mustang 4. 6L LoudMouth II Cat Back Exhaust System This Part Fits: Year Make Model Submodel 1999 2004 Ford Mustang GT 2001 Ford Mustang GT Bullitt 2003 2004 Ford Mustang Mach 1 1999,2001,2003 2004 Ford Mustang SVT Cobra 2003 Ford Mustang SVT Cobra 10th Anniversary
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Your SLP 1999-2004 Ford Mustang 4.6L LoudMouth II Cat-Back Exhaust System orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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4.4 ★★★★★
Based on 411 reviews
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Product Reviews
★★★★★ 5
It does it's thing. Perfect fit compared to OEM.
If you aren't changing your own air filters in your vehicle you should be. Air filter swaps are a huge ripoff if you get the dealer to do them. Granted, most maintenance at dealerships is a ripoff BUT it takes all of five minutes if you don't know what you are doing, most of which is watching the youtube video telling you how to do it, and maybe a minute or two if you do know what you are doing. Save yourself some cash.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 23, 2026
★★★★★ 5
Great alternative to OEM model
Works great for my car. Really didn’t see a difference between these ones and the OEM ones. It provides good value with easy installation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026
★★★★★ 5
Good fit and price for a 2017 Honda Civic
Been using these in my Honda Civic for a while now they work great no complaints
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2026
★★★★★ 5
pretty good for price!
Great item with easy install, drops right in for a perfect fit! the quality is up there for its money, but certainly isn’t going to be your top of the line. however it gets the job done and has a prettt decent air flow for its price!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 13, 2025
★★★★★ 4
As expected
Fits perfectly and last long
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 15, 2026
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