Flowmaster 817273 Header-back System 409S - Dual Rear Exit - American Thunder - Moderate Sound
Fits 1966 to 1964 Mustang. Does not fit GT or convertibles.
Flowmaster American Thunder true dual exhaust systems are engineered with maximum performance in mind. These systems feature specially tuned mufflers, cross-over pipes, clamps, hangers and mounting hardware. If you're looking for the famous Flowmaster tone look no further. American Thunder will deliver the aggressive tone you want as well as the performance you demand.
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