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Last Review Posted SLP " LOUD MOUTH " 1999-04 Mustang GT / MACH I
I was torn between the SLP loudmouth catback and Borla stingers. After a ton of research I decided on the SLP1. I am very happy I did, my stang sounds sick! All of my buddies cant believe how mean my stang sounds now. I had some Magnaflow mufflers on at first. To say the least my car sounds mean and loud, but not annoyingly loud. I could also feel the HP gains as well.

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