Description
The Flowmaster 40 Series Delta Flow Chambered Muffler uses a two-chamber design with Delta Flow® technology to increase exhaust scavenging for improved performance and reduced interior sound. Compared to standard 40 Series mufflers, this design produces a milder exterior tone and lower interior resonance while retaining aggressive performance characteristics.
Constructed of 16-gauge 409 stainless steel and fully MIG welded, the 40 Series Delta Flow Muffler is built for maximum durability. Its offset 2.50-inch inlet and outlet make it ideal for a variety of street, strip, and off-road applications, providing aggressive sound while remaining compact enough for versatile installations.
With no internal packing to blow out and a durable construction, this muffler delivers reliable performance for high-demand vehicles.
Key Features
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Flowmaster 40 Series Delta Flow Chambered Muffler
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Aggressive exterior sound level
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Milder tone and reduced interior resonance compared to standard 40 Series
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Delta Flow® technology for increased exhaust scavenging
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Excellent for street, strip, and off-road applications
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No internal packing to blow out
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Fully MIG welded 16-gauge 409 stainless steel
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Offset 2.50-inch inlet and outlet
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Durable and long-lasting construction
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Universal fit for 4/6-cylinder engines
Fitment Information
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Universal fit for 4-cylinder engine vehicles
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Universal fit for 6-cylinder engine vehicles
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Designed for street, strip, and off-road 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: 40 Series Delta Flow
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Muffler Type: Chambered
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Sound Level: Aggressive
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Body Material: 409 Stainless Steel
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Body Shape: Oval
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Body Length: 13.00 IN
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Body Height: 4.00 IN
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Body Width: 9.75 IN
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Overall Length: 19.00 IN
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Finish: High-Temperature Paint
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Color: Black
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Inlet Connection: Slip-Fit
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Inlet Diameter: 2.50 IN
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Inlet Inside Diameter: 2.50 IN
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Inlet Outside Diameter: 2.63 IN
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Inlet Location: Offset
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Inlet Quantity: 1
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Inlet Type: Clamp-On
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Outlet Connection: Slip-Fit
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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: Offset
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Outlet Quantity: 1
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Clamps Included: No
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Hanger Included: No
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Heat Shield Attached: No
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Mount Type: Uses New Hangers (Not Included)
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Reversible: No
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Tunable: No
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Universal Or Specific Fit: Universal
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Vehicle Type: 4/6 CYL Engine
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California Proposition 65: Yes
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Prop 65 Chemical: Chromium (hexavalent compounds)