American Thunder

The Sound That Started it All

American Thunder® systems produce the ‘original’ Flowmaster sound …in most cases a very aggressive sound level. American Thunder systems use various chambered mufflers to achieve the performance gains and aggressive sound that enthusiast's lust for in their car or truck, inside and out. Available in stainless steel or economical aluminized steel, American Thunder systems are a great choice when you want to be heard.

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