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The Original 40 series muffler delivers an aggressive exterior and interior tone. If you're looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.


  • Excellent Street/Strip and Off Road application
  • Noticeable interior resonance
  • Aggressive Sound Exterior Exhaust Tone
  • Durable fully welded 16 gauge aluminized steel


***Combine with the 2.25" Exhaust Starter Kit to connect our header to the mufflers


See the video!

Flowmaster 40 Series Chambered Muffler

SKU: FLM-40-225
  • 40 Series - 2.25 Offset In / 2.25 Center Out - Aggressive Sound

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