Flowmaster Classic American Thunder Axle-Back Exhaust System for 2005-2010 4.6L 3V Mustangs and 2007-2010 Shelby GT500s.
Since the early 1980?s when Ford released the now famous 5.0L HO engine, Flowmaster equipped Mustangs have become the signature sound of the modern muscle car era. Flowmaster?s new axle-back system for the latest generation of 2005-2009 Mustang?s delivers improved performance, looks and a sound reminiscent of those early 5.0L cars. Featuring Classic square cased 40 Series mufflers, the kit follows the factory exhaust routing, utilizes the factory hanger mounting points and includes all necessary mounting hardware for an easy and perfect fitment. Designed for the serious enthusiast who really wants to hear their pony breathe, these mufflers produce a deep and aggressive exterior tone on the throttle, along with a considerable amount of interior sound.
For those looking for performance, but with a tamer sound, Flowmaster also offers a quieter alternative our part number CBF13.
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These mufflers sound mean. a nice low bass tone when idling. i also have hot rod cams. it shakes and rumbles and makes all the rite sounds. and there is ALOT of interior drone. but when you mash the gas...they sound almost scary.