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Flowmaster Pro Series Muffler 15020100

Flowmaster Pro Series Muffler 15020100
Flowmaster Pro Series Muffler 15020100Flowmaster Pro Series Muffler 15020100Flowmaster Pro Series Muffler 15020100
$425.99 ea
NEWOut of stock with HOLLEY PERFORMANCE PRODUCTS as of 09/23/2023
Model: 4004871
Supplier has not provided any fitment data for this product.
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 Pro Series mufflers consistently delivered performance that is equal to or surpasses open pipe systems, while dramatically reducing sound levels across the RPM range.
  • Durable Fully Welded 18ga Aluminized Steel Case
  • Limited Lifetime Warranty
  • 409 Stainless Steel Internal Construction
  • Race Proven Design
  • Premium Flowmaster Quality
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 Muffler - Not a direct fit. Some adaptation required.

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 9.000 in.
Body Height (in) 9
Body Length 20.000 in.
Body Length (in) 20
Body Width 9.000 in.
Body Width (in) 9
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 5.000 in.
Inlet Diameter (in) 5
Inlet Inside Diameter 5.000 in.
Inlet Outside Diameter 5.000 in.
Inlet Position Center
Inlet Type Single Center
Main Piping Diameter 5.000 in.
Material Stainless Steel
Muffler Series Pro Series
Muffler Type Laminar Flow
Outlet Connection Type Pipe Connection
Outlet Diameter 5.000 in.
Outlet Diameter (in) 5
Outlet Outside Diameter 5.000 in.
Outlet Position Center
Outlet Type Single Center Outlet
Overall Length 28.500 in.
Overall Length (in) 26
Part Type Exhaust Muffler
Reversible No
Shape Oval
Sound Level Moderate
Tip Quantity 0
Type of Muffler Laminar Flow
Vehicle Type Classic Muscle Car
WARNING CA Proposition 65 WARNING: Cancer and Reproductive Harm
Warranty Limited Lifetime (Lifetime)


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Flowmaster Pro Series Muffler 15020100:
Mustang Depot 2023