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SLP LoudMouth modular cat-back exhaust for 1999–2004 Ford Mustang GT and Mach 1 with the 4.6L engine. The modular LoudMouth system replaces the factory cat-back and is offered as a direct-fit option to refresh exhaust routing and tone for Mustang GT/Mach 1 applications across those years, while retaining compatibility with the vehicle’s factory exhaust architecture.
SLP 1999-2004 Ford Mustang 4.6L LoudMouth Cat-Back Exhaust System
