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Flowmaster 40 Series Original Mufflers


Flowmaster
Flowmaster 40 Series Original Mufflers

Product images may differ from actual product appearance.

The muffler that started it all: Flowmaster's 40 Series. Made of aluminized or stainless steel, these are the most aggressive sounding street/strip mufflers in the Flowmaster lineup. They also create resonance in the vehicle so, if you want "surround sound" from your exhaust, look no further.

Features
  • For street and strip applications
  • Loud, aggressive sound with interior resonance
  • Case: 13" L (4" Thick)
  • Overall: 19" L x 9.75" W
  • Aluminized steel or 409S stainless steel (stainless has limited lifetime warranty)
  • Stainless mufflers are painted dark grey metallic to improve resistance from the elements
  • MIG welded for maximum durability


  • 14 Products

    Offset In/Offset Out

    389-42443
    40 Series Original Muffler
  • Offset In/Offset Out: 2.25"
  • Aluminized Steel
  • $77.50
    Ships

    389-8042443
    40 Series Original Muffler
  • Offset In/Offset Out: 2.25"
  • Stainless Steel
  • $82.99
    Ships

    389-42543
    40 Series Original Muffler
  • Offset In/Offset Out: 2.5"
  • Aluminized Steel
  • $77.50
    Ships

    389-8042543
    40 Series Original Muffler
  • Offset In/Offset Out: 2.5"
  • Stainless Steel
  • $82.99
    Ships

    389-43043
    40 Series Original Muffler
  • Offset In/Offset Out: 3"
  • Aluminized Steel
  • $77.50
    Ships

    389-8043043
    40 Series Original Muffler
  • Offset In/Offset Out: 3"
  • Stainless Steel
  • $82.99
    Ships

    Offset In/Center Out

    389-42441
    40 Series Original Muffler
  • Offset In/Center Out: 2.25"
  • Aluminized Steel
  • $77.50
    Ships

    389-8042441
    40 Series Original Muffler
  • Offset In/Center Out: 2.25"
  • Stainless Steel
  • $82.99
    Ships

    389-42541
    40 Series Original Muffler
  • Offset In/Center Out: 2.5"
  • Aluminized Steel
  • $77.50
    Ships

    389-8042541
    40 Series Original Muffler
  • Offset In/Center Out: 2.5"
  • Stainless Steel
  • $82.99
    Ships

    389-43041
    40 Series Original Muffler
  • Offset In/Center Out: 3"
  • Aluminized Steel
  • $77.50
    Ships

    389-8043041
    40 Series Original Muffler
  • Offset In/Center Out: 3"
  • Stainless Steel
  • $82.99
    Ships

    Center In/Dual Out

    389-430402
    40 Series Original Muffler
  • Center In 3"/Dual Out 2.5"
  • Aluminized Steel
  • $77.50
    Ships

    389-80430402
    40 Series Original Muffler
  • Center In 3"/Dual Out 2.5"
  • Stainless Steel
  • $82.99
    Order Today Ships 12/10/14

    14 Products