Flowmaster's race-oriented American Thunder® Extreme Cat-back system is designed to give your Pony a more American muscle-car growl while adding the power to go with it. These systems are constructed from mandrel bent 409 stainless steel tubing for maximum performance and include Super 40 series mufflers. This American Thunder Extreme system delivers a super aggressive interior and exterior tone and is suited to the enthusiast who wants the most aggressive components they can purchase. Like all Flowmaster® systems, the benefits include improved throttle response and power. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.
Application: 1999, 2000, 2001, 2002, 2003, 2004 - 4.6L SOHC Ford Mustang GT, 2001 Bullit, 2003-2004 Mach1
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