FLOWMASTER 40 SERIES ORIGINAL MUFFLERS

The muffler that started it all, the original 40 Series Muffler is an aggressive sounding street/strip muffler that delivers a powerful “Flowmaster Sound” you’ve heard so much about it. If you really want to hear your exhaust system and that great muscle car tone – from both inside and out of the vehicle – the 40 Series is for you.

  • The original high performance Flowmaster muffler
  • Aggressive sound for the enthusiast who likes their exhaust LOUD
  • Available in either aluminized steel or 409S Stainless
  • Stainless steel mufflers covered by limited lifetime warranty
  • Fully MIG welded for durability
FM_40_Series_Cutaway

 

40 Series Muffler

IN/OUTC/CO/CC/OO/OO/O SAME SIDE
2.25"42441
8042441
4244242443
8042443
2.50"42541
8042541
4254242543
8042543
3.00"43041
8043041
43043
8043043
409S Stainless Steel Models
2.25"
2.50"
3.00"
IN/OUTD/CC/DD/DO/D
2.25"/2.25"
2.50"/2.50"425404
3.00"/2.50"430402
80430402
409S Stainless Steel Models
3.00"/2.50"
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