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This two chamber design incorporates Flowmaster's Delta Flow technology. The Delta deflectors generate increased scavenging for better performance and reduced interior sound. Milder exterior tone and reduced interior resonance over Original 40 series. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.


  • Durable fully welded 16 gauge aluminized steel
  • Excellent Street/Strip and Off Road application
  • No internal packing to blowout
  • Race proven Delta Flow technology


Combine with the 2.00" or 2.25" Exhaust Starter Kits (for small sixes) to connect our header to the mufflers


See the video!

Flowmaster 40 Series Delta Flow Chambered Muffler

  • 40 Delta Flow - 2.00 Offset In / 2.00 Center Out - Aggressive Sound


    40 Delta Flow - 2.25 Offset In / 2.25 Center Out - Aggressive Sound

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