Saleen 2005-2009 Mustang GT Center Exhaust Kit. The exhaust system is an innovative variable design,featuring twin mufflers with vacuum-actuated valves that open above a specified back pressure. When these valves open, a portion of the exhaust gases is routed through a second set of tail pipes pointed at the ground which allows the engine to be calibrated to produce higher torque and non restrictive flow. Must be used with the saleen rear fascia kit.
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