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FlowMonster 1-Chamber Muffler [Aluminized Steel]
InfoVehicle Info Needed
FLOWMASTERPART NUMBER: 389-42513-FM

FlowMonster 1-Chamber Muffler [Aluminized Steel]

$4472
2 left in stock
ShippingShips on Nov 02, 2026
Lowest PriceLowest Price Guarantee

Offset In/Offset Out
FlowMonster 1-Chamber Muffler
  • Universal Fit
  • 2.5 in. Inlet/Outlet
  • Offset In/Offset Out
  • Chambered Design
  • Oval Body, 6.5 in. Long
  • Aggressive Sound
  • Aluminized Steel
  • High-Heat Silver Coating
  • Sold Individually

    For builders who want the classic Flowmaster sound, the 42513-FM FlowMonster 1-Chamber is a chambered, aluminized steel muffler with 2.5 in. inlet and outlet connections and an offset inlet and an offset outlet.

    Flowmaster 42513-FM Technical Specifications:

    • Aluminized steel construction.
    • Aggressive sound level.
    • Oval body measuring 6.5 in. long, 9.5 in. wide and 4 in. high.
    • High-heat silver coating.

    Flowmaster 42513-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 Height4.5
    Package Width10.0
    Package Length13.0
    Weight6.3 PG
    Part CategoryPerformance Parts
    Hanger IncludedNo
    Outlet Diameter2.5 in (63.5 mm)
    Muffler SeriesFlowMonster 1-Chamber
    QuantitySold Individually
    Inlet LocationOffset
    Muffler TypeReflection
    Heat ShieldNo
    Internal ConstructionChambered
    Case ShapeOval
    Body Width9.5 in (241.3 mm)
    Body MaterialAluminized Steel
    Exit QuantityOne
    Body Length6.5 in (165.1 mm)
    Inlet Diameter2.5 in (63.5 mm)
    Clamps IncludedNo
    Body Height4 in (101.6 mm)
    Inlet QuantityOne
    Part FitmentUniversal
    Outlet PositionOffset
    Sound LevelAggressive
    FinishSilver
    Vendor Part Number42513-FM
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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