Flowmaster Super 40 Series Muffler for Late Model Pickup Trucks - 853548YouTube Button

Flowmaster Super 40 Series Chambered Muffler

Super 40 Muffler 409S - 3.50 Offset In / 3.50 Offset Out - Aggressive Sound

PART# 853548

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$155.95   Suggested Retail
$139.95   Your Price
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Delta Flow
Universal Muffler - Not a Direct Fit. Fabrication Required to Install.


Flowmaster® introduces their new Super 40® Series muffler intended for late model pickup trucks with 3.5in OEM tubing size. This muffler features a 3.5in offset inlet/offset outlet configuration with larger 4.0in internals for maximum flow capabilities with the larger engine sizes found in today's trucks. Being a Super 40 design, this muffler will deliver a deep, aggressive sound outside and inside the vehicle. Fully welded with 409S Stainless Steel, these mufflers are covered by Flowmaster®s Lifetime Limited Warranty and are made in the USA. Not a direct fit. Some fabrication required.


  • 409SS Stainless Steel Construction
  • Race proven Delta Flow technology
  • Dyno Tuned For Maximum Performance


Body Height (in)5
Body Length (in)13.5
Body Width (in)10
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Emission Code5
Inlet Connection TypePipe Connection
Inlet Diameter (in)3.5
Inlet PositionOffset
MaterialStainless Steel
Muffler TypeChambered
Outlet Diameter (in)3.5
Outlet PositionOffset
Product TypeStreet Mufflers
Sound LevelAggressive Sound
Type of MufflerChambered
Part Number853548


This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Tech Resources

Universal Muffler - Not a Direct Fit. Fabrication Required to Install.



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    Some parts are not legal for use in California or other states with similar regulations.