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Flowmaster Outlaw Series Race Muffler

Outlaw Race Muffler - short - 409SS- 3.50 Center In / 3.50 Center Out -Aggressive

PART# 815435S

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$133.95   Suggested Retail
$119.95   Your Price
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Universal Race Muffler - Not a direct fit. Some adaptation required.


Flowmaster's stainless steel Outlaw mufflers are the ideal solution for race classes requiring mufflers but having no set sound specifications. Available in two lengths, the Outlaw and Outlaw shorty mufflers provide minimal sound reduction with no performance penalty. These small, light mufflers can be installed directly on your header collectors, or mounted in a full exhaust system depending on your class rules or personal preferences.


  • Stainless Steel Construction
  • Aggressive Sound Performance Tone
  • Maximum Scavenging
  • Compact Design


Body Height (in)4.5
Body Length (in)6
Body Width (in)4.5
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Emission Code5
Inlet Diameter (in)3.5
Inlet PositionCenter
MaterialStainless Steel
Muffler SeriesOutlaw
Muffler TypeChambered
Outlet Diameter (in)3.5
Outlet PositionCenter
Product TypeRace Products
Type of MufflerChambered
Part Number815435S


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 Race Muffler - Not a direct fit. Some adaptation required.
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      Some parts are not legal for use in California or other states with similar regulations.