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Flowmaster Original 40 Series Muffler

  • The original high performance Flowmaster muffler
  • Aggressive sound for the enthusiast who likes their exhaust LOUD
  • Available in either aluminized steel or 409SS Stainless Steel
  • Stainless steel mufflers covered by limited lifetime warranty
  • Fully MIG welded for durability
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    40 Series Original

    The Flowmaster 40 Series Muffler is the original high-performance exhaust upgrade that revolutionized the muscle car sound. Known for its aggressive tone and deep, throaty rumble, this street and strip muffler is ideal for enthusiasts who want to be heard. The 40 Series delivers the unmistakable "Flowmaster sound" that defines American muscle. Whether you're driving a classic muscle car or a modern performance vehicle, the Flowmaster 40 Series Muffler is for you!