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Flowmaster Pro Series Muffler

Pro Series Muffler - 3.50 Center In / 3.50 Center Out - Moderate Sound

PART# 13516100

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The Pro Series mufflers work on all applications ranging from street trucks, diesel pullers and RV pushers to every class of racing on dirt or asphalt. During development, at the dyno and track, the new Pro Series mufflers consistently delivered performance that is equal to or surpasses open pipe systems, while dramatically reducing sound levels across the RPM range.


  • High horsepower apps include diesels/RVs/trucks
  • Race Proven Design
  • 409 Stainless Steel Internal Construction
  • Durable fully welded 16 gauge stainless steel case


Body Height (in)6
Body Length (in)16
Body Width (in)6
Emission Code5
Inlet3-1/2 inch
Inlet Diameter (in)3.5
Inlet PositionCenter
MaterialStainless Steel
Muffler SeriesPro Series
Muffler TypeLaminar Flow
Outlet3-1/2 inch
Outlet Diameter (in)3.5
Outlet PositionCenter
Product TypeStreet Mufflers
Sound LevelModerate Sound
Type of MufflerLaminar Flow
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number13516100



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. Some adaptation required.


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