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FlowMonster 2-Chamber Muffler [Aluminized Steel]
InfoVehicle Info Needed
FLOWMASTERPART NUMBER: 389-42443-FM

FlowMonster 2-Chamber Muffler [Aluminized Steel]

$4995
2 left in stock
ShippingShips on Nov 02, 2026
Lowest PriceLowest Price Guarantee
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$596
Chambered Deep-Tone Muffler 2.250 in. Offset Inlet / Offset Outlet

555-30212

Chambered Deep-Tone Muffler 2.250 in. Offset Inlet / Offset Outlet

$4399

Offset In/Offset Out
FlowMonster 2-Chamber Muffler
  • Universal Fit
  • 2.25 in. Inlet/Outlet
  • Offset In/Offset Out
  • Chambered Design
  • Oval Body, 13 in. Long
  • 19 in. Overall Length
  • Aluminized Steel
  • High-Heat Silver Coating
  • Sold Individually

    For builders who want the classic Flowmaster sound, the 42443-FM FlowMonster 2-Chamber is a chambered, aluminized steel muffler with 2.25 in. inlet and outlet connections and an offset inlet and an offset outlet.

    Flowmaster 42443-FM Technical Specifications:

    • Fully welded 16-gauge aluminized steel construction.
    • Aggressive exterior tone with noticeable interior resonance.
    • Suited to street, strip and off-road applications.
    • Oval body measuring 13 in. long, 9.75 in. wide and 4 in. high.
    • 19 in. overall length.
    • High-heat silver coating.

    Flowmaster 42443-FM Installation Notes:

    • Universal fit: not a direct fit, so some adaptation is required.
    • Clamps and hangers are not included.

      • Aggressive Sounding Mufflers!

      Flowmaster FlowMonster Mufflers deliver an aggressive exhaust sound that speaks "POWER"! These compact mufflers have superior heat-absorption and corrosion-resistant materials that deliver lasting dependability and appearance. Fully MIG-welded construction provides dominant durability and excellent exhaust flow to get the most performance out of your car, truck or SUV.

    Part TypeMuffler
    Product LineFlowmaster FlowMonster Mufflers
    BrandFLOWMASTER
    Package Height4.4
    Package Width10.2
    Package Length19.9
    Weight10.05 PG
    Part CategoryPerformance Parts
    Inlet LocationOffset
    Muffler TypeReflection
    Heat ShieldNo
    Mount TypeUses New Hangers (Not Included)
    Body Length13 in (330.2 mm)
    Inlet Outside Diameter2.38 in (60.45 mm)
    Inlet Diameter2.25 in (57.15 mm)
    Clamps IncludedNo
    Inlet QuantityOne
    Sound LevelAggressive
    FinishSilver
    Outlet Outside Diameter2.38 in (60.45 mm)
    ReversibleNo
    Hanger IncludedNo
    Outlet Diameter2.25 in (57.2 mm)
    Muffler SeriesFlowMonster 2-Chamber
    TunableNo
    QuantitySold Individually
    Overall Length19 in (482.6 mm)
    Internal ConstructionChambered
    Case ShapeOval
    Body Width9.75 in (247.65 mm)
    Body MaterialAluminized Steel
    Exit QuantityOne
    Body Height4 in (101.6 mm)
    Outlet TypeSingle
    Part FitmentUniversal
    Outlet PositionOffset
    Vendor Part Number42443-FM
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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    Some parts are not legal for use in California or other states with similar laws / regulations
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