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Flowmaster Pro Series Outlaw Race Muffler

Pro Series Outlaw Race Muffler - 3.5"/3.5"

PART# 13509135

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$107.95   Suggested Retail
$87.26   Holleydays Price
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Racing Applications.


To address the increasing number of tracks around the country that are coming under pressure to regulate sound emissions, the Flowmaster Engineering team went to the drawing board with three goals; Maximum power, Maximum decibel reduction and Minimal weight. This exciting new line of race mufflers is the result of literally decades of Flowmaster involvement in the racing industry and were truly born at the track! Suited to all forms of motorsports where space and weight is a concern while still delivering maximum power. They are surprisingly quiet; netting a reduction of approximately 8-10 decibels over open headers and can be run with a turndown for even further noise reduction. Can be used on methanol or gas engines and/or, as an addition to an existing exhaust system for further sound reduction without a loss of power.


  • No Packing to Burn Out
  • Race Proven Sound Reduction Technology
  • Dyno Tuned For Maximum Performance
  • Durable MIG Welded Construction


Body Height (in)5
Body Length (in)9
Body Width (in)5
California Proposition 65 RequiredNo
Emission Code5
Inlet3-1/2 inch
Inlet Diameter (in)3.5
Inlet PositionCenter
MaterialAluminized Steel
Muffler SeriesPro Series Outlaw
Outlet3-1/2 inch
Outlet Diameter (in)3.5
Outlet PositionCenter
Product TypeRace Products
Sound LevelAggressive Sound
Type of MufflerChambered
Part Number13509135


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

Racing Applications.
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      *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

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

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