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Vehicle Info NeededFLOWMASTERPART NUMBER: 389-42443
40 Series Original Muffler Offset In/Offset Out: 2.25"
$10195
2 left in stock
Ships on Nov 02, 2026
Lowest Price GuaranteeOffset In/Offset Out
- 40 Series Original Muffler
- Offset In/Offset Out: 2.25"
- Aluminized Steel
Universal Muffler - Not a direct fit. Some adaptation required. - Durable Fully Welded 16ga Aluminized Steel
- 3 Year Limited Warranty
- Aggressive And Powerful Exterior Exhaust Tone
- Notable Interior Resonance
- Excellent Street/Strip And Off Road Application
- No Internal Packing To Blowout
- The Original Two Chamber Design
- www.Flowmastermufflers.com
The Muffler That Started It All!
Flowmaster's 40 Series Original Mufflers are designed for street/strip and off-road use. These aggressive sounding mufflers deliver a powerful, classic "Flowmaster Sound" from both inside and outside of the vehicle. Give your exhaust system a great muscle car tone with one of these fully MIG welded 40 Series original mufflers.
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Features:
- The original high-performance muffler
- Aggressive sound
- Constructed from stainless steel or 16-gauge aluminized steel
- Fully MIG welded
Part TypeMuffler
Product LineFlowmaster 40 Series Original Mufflers
BrandFLOWMASTER
Package Height4.6
Package Width10.1
Package Length20.4
Weight10.2 PG
Outlet Quantity1
Inlet PositionOffset
Inlet TypeWeld-On
Inlet Size (In.)2.25
Heat Shield AttachedNo
Body Length13 in.
Muffler Count1
Inlet Outside Diameter2.38 in.
Inlet Quantity1
Sound LevelAggressive
Outlet Outside Diameter2.38 in.
Muffler MaterialSteel
Universal Or Specific FitUniversal
Hanger IncludedNo
Inlet Connection TypePipe Connection
Outlet Diameter2.25 in (57.2 mm)
ColorBlack
TunableNo
Case Length13 in (330.2 mm)
Case ShapeOval
Body Width9.50 in.
Outlet Inside Diameter2.25 in.
Body Height4 in.
Outlet TypeSingle
Outlet PositionOffset
Part CategoryPerformance Parts
ShapeOval
Exhaust Tip Quantity0
Inlet LocationOffset
Muffler TypeChambered
Outlet StyleStandard, without tip
Muffler FinishAluminized
Mount TypeUses New Hangers (Not Included)
Inlet Diameter2.25 in.
Clamps IncludedNo
FinishHigh-Temperature Paint
ReversibleNo
Outlet Size2.25 in (57.2 mm)
Muffler SeriesOriginal 40 Series
QuantitySold individually
Overall Length19.00
MaterialAluminized Steel
Internal ConstructionChambered
Body MaterialAluminized Steel
Inlet Inside Diameter2.25 in.
Outlet LocationOffset
FitmentUniversal
Part FitmentUniversal
Vendor Part Number42443
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
