Description
The Flowmaster Original 40 Series Chambered Muffler delivers the iconic aggressive exhaust sound that defined Flowmaster performance. Known for its unmistakable exterior growl and noticeable interior resonance, this muffler is the choice for enthusiasts seeking the classic Flowmaster tone for street, strip, or off-road applications.
Constructed from durable 16-gauge 409 stainless steel and fully MIG welded, the Original 40 Series is built for long-term durability and consistent performance under demanding conditions. The chambered internal design produces an aggressive exhaust note while maintaining strong exhaust flow, making it ideal for performance-oriented builds.
Featuring a 3.00-inch center inlet and dual 2.50-inch outlets, this universal-fit muffler is well suited for custom exhaust fabrication and classic muscle car applications where aggressive sound and proven durability are desired.
Key Features & Benefits
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Original 40 Series Flowmaster sound
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Aggressive exterior exhaust tone
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Noticeable interior resonance
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Fully welded 16-gauge 409 stainless steel construction
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Chambered muffler design for strong performance
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Excellent for street, strip, and off-road applications
Fitment Information
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Universal fit
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Designed for custom exhaust systems
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Suitable for classic muscle car applications
Specifications
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Brand: Flowmaster
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Product Type: Street Mufflers
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Part Type: Exhaust Muffler
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Muffler Series: Original 40 Series
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Muffler Type: Chambered
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Sound Level: Aggressive
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Category: Exhaust
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Sub Category: Mufflers
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Vehicle Type: Classic Muscle Car
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Universal Or Specific Fit: Universal
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California Proposition 65: Yes
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California Proposition 65 Chemical Name: Chromium (hexavalent compounds)
Construction & Design
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Body Material: 409 Stainless Steel
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Finish: High-Temperature Paint
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Color: Black
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Shape: Oval
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Reversible: No
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Tunable: No
Dimensions
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Body Height: 4.00 IN
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Body Width: 9.50 IN
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Body Length: 13.00 IN
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Overall Length: 19.00 IN
Inlet Specifications
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Inlet Diameter: 3.00 IN
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Inlet Inside Diameter: 3.00 IN
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Inlet Outside Diameter: 3.13 IN
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Inlet Location: Center
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Inlet Quantity: 1
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Inlet Connection: Slip-Fit
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Inlet Type: Clamp-On
Outlet Specifications
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Outlet Inside Diameter: 2.50 IN
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Outlet Outside Diameter: 2.63 IN
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Outlet Location: Dual
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Outlet Quantity: 2
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Outlet Type: Dual
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Outlet Connection: Slip-Fit
Installation Details
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Mount Type: Uses New Hangers (Not Included)
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Hanger Included: No
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Clamps Included: No
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Clamping Type: Flat Band
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Heat Shield Attached: No
