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Flowmaster 40 Series Delta Flow Mufflers
Flowmaster 40 Series Delta Flow Muffler

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Flowmaster 40 Series Delta Flow Mufflers

Flowmaster's Delta Flow 40 Series two chamber design incorporates Flowmaster's patented Delta Flow technology. The “Delta” deflectors generate increased scavenging for better performance and reduced interior sound. Perfect for vehicles where an aggressive exterior tone is desired with reduced interior tone.

Vehicle Accessories carries a complete line of Flowmaster products. Stop by any of our locations in Flint, Bay City, Clarkston and Lansing or call us Toll Free at 1-866-820-2119 for pricing and availability. If you don't see a product that you were looking for, please give us a call so that we may assist you.


  • The quietest muffler option in Flowmaster's 40 Series two-chambered line
  • Reduced resonance over 40 series mufflers
  • Stainless steel 409S version backened by lifetime warranty
  • Features advanced two-chamber design & Delta Flow technology
  • Available in aluminized steel or 409S Stainless for harsh weather
  • Both styles are fully MIG-welded for maximum durability

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