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Flowmaster Outlaw Series™ Race Muffler 815435S

Flowmaster Outlaw Series™ Race Muffler 815435S
Flowmaster Outlaw Series™ Race Muffler 815435SFlowmaster Outlaw Series™ Race Muffler 815435SFlowmaster Outlaw Series™ Race Muffler 815435S
$234.99 ea
NEWARRIVING SOONEstimated Ship Date 10/16/2023 (If Ordered Today)17 available from HOLLEY PERFORMANCE PRODUCTS as of 09/23/2023
Model: 4005282
Supplier has not provided any fitment data for this product.
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.
  • Durable Fully Welded 16ga Aluminized Steel
  • Round Case Allows Install In Limited Space Apps
  • Designed for Maximum Horsepower and Torque
  • Minimal Decibel Reduction
  • Race Application Where Muffler Rules are in Effect
  • No Internal Packing To Blow Out
  • Premium Flowmaster Quality
  • Aggressive Sound Performance Tone
  • Maximum Scavenging
  • Compact Design
Holley Performance Emission Code 5: 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
Installation Notes:
Universal Race Muffler - Not a direct fit. Some adaptation required. This muffler is directional. The internal rings lean back towards the outlet of the muffler.

About Flowmaster

Manufacturer of performance exhaust systems, mufflers, performance air intakes, turbo boost modules, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.


Download Name File Size



Automotive Item Grade High Performance
Body Height 4.500 in.
Body Height (in) 4.5
Body Length 6.000 in.
Body Length (in) 6
Body Width 4.500 in.
Body Width (in) 4.5
California Proposition 65 Chemical Name Chromium (hexavalent compounds)
California Proposition 65 Chemical Name 1 Nickel (Metallic)
California Proposition 65 Chemical Name 2 Chromium (hexavalent compounds)
California Proposition 65 Required Yes
Color Black
Emission Code 5
Finish Paint
Fitment Universal
Inlet Connection Type Pipe Connection
Inlet Diameter 3.500 in.
Inlet Diameter (in) 3.5
Inlet Inside Diameter 3.500 in.
Inlet Outside Diameter 3.500 in.
Inlet Position Center
Inlet Type Single Center
Main Piping Diameter 3.500 in.
Material Stainless Steel
Muffler Series Outlaw
Muffler Type Reflection
Outlet Connection Type Pipe Connection
Outlet Diameter 3.500 in.
Outlet Diameter (in) 3.5
Outlet Outside Diameter 3.500 in.
Outlet Position Center
Outlet Type Single Center Outlet
Overall Length 16.750 in.
Overall Length (in) 12.75
Part Type Exhaust Muffler
Reversible No
Shape Round
Sound Level Aggressive Sound
Tip Quantity 0
Type of Muffler Reflection
Vehicle Type Race
WARNING CA Proposition 65 WARNING: Cancer and Reproductive Harm
Warranty Limited Lifetime (Lifetime)


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Flowmaster Outlaw Series™ Race Muffler 815435S:
Mustang Depot 2023