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![FlowMonster 2-Chamber Muffler [Aluminized Steel]](https://www.jegs.com/images/mini_750/300/389/389-430402-fm.jpg)
Vehicle Info NeededFLOWMASTERPART NUMBER: 389-430402-FM
FlowMonster 2-Chamber Muffler [Aluminized Steel]
$4995
4 left in stock
Ships on Nov 02, 2026
Lowest Price GuaranteeCenter In/Dual Out
FlowMonster 2-Chamber MufflerUniversal Fit 3 in. Inlet, Dual 2.5 in. Outlet Center In/Dual 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 430402-FM FlowMonster 2-Chamber is a chambered, aluminized steel muffler with 3 in. inlet, dual 2.5 in. outlet connections and a center inlet and dual outlets.
Flowmaster 430402-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 430402-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 Width10.1
Package Length19.9
Weight10.71 PG
Part CategoryPerformance Parts
Inlet LocationCenter
Muffler TypeReflection
Heat ShieldNo
Mount TypeUses New Hangers (Not Included)
Body Length13 in (330.2 mm)
Inlet Outside Diameter3.13 in (79.5 mm)
Inlet Diameter3 in (76.2 mm)
Clamps IncludedNo
Inlet QuantityOne
Sound LevelAggressive
FinishSilver
Outlet Outside Diameter2.63 in (66.8 mm)
ReversibleNo
Hanger IncludedNo
Outlet Diameter2.5 in (63.5 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 QuantityTwo
Body Height4 in (101.6 mm)
Outlet TypeDual
Part FitmentUniversal
Outlet PositionDual
Vendor Part Number430402-FM
Package Qty1
Package TypeEA
No Questions
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