Flowmaster 12512409 | Exhaust Muffler

Part Number
Super HP-2 Series Muffler; 2.5 in. Center Inlet/Outlet; Oval; 4 in. x 5 in. x 12 in.; 409 Stainless Steel
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Estimated Ship Date: 1 Business Day or Less
Flowmaster has taken the laminar core of our classic HP-2 muffler and wrapped it in a new compact square case. The new Super HP-2 Series muffler offers the same great performance benefits and moderate tone that you would expect from our laminar flow mufflers, now in a new sleek styling. These mufflers are available in either a 409S stainless steel case or a polishable 304S stainless steel case and in sizes ranging from 2.00 in., 2.25 in. and 2.50 in. These mufflers are covered by Flowmaster's Lifetime Limited Warranty.

BRAND: Flowmaster


  • Patented Laminar Flow Technology
  • Stainless Steel Construction
  • 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
  • Super HP-2 Series Muffler
  • Dyno Tuned for Maximum Performance
  • SUPER HP-2 2.50in.IN/OUT 12in. 409S
  • HP-2; muffler; 409S; Aggressive sound
  • Universal Muffler-Not a direct fit. Some adaptation required.
  • Exhaust Muffler
  • Lifetime Limited Warranty
  • Super HP-2 Series Muffler; 2.5 in. Center Inlet/Outlet; Oval; 4 in. x 5 in. x 12 in.; 409 Stainless Steel;


Body Height4.000 in.
Body Length12.000 in.
Body Width5.000 in.
California Proposition 65 Chemical Name 1Nickel (metallic)
California Proposition 65 Chemical Name 2Chromium (hexavalent compounds)
Inlet Diameter2.500 in.
Inlet Inside Diameter2.500 in.
Inlet Outside Diameter2.500 in.
Inlet PositionCenter
Inlet TypeSingle Center
Main Piping DiameterOEM
MaterialStainless Steel
Muffler SeriesHP-2 Series
Outlet Diameter2.500 in.
Outlet Outside Diameter2.500 in.
Outlet PositionCenter
Outlet TypeSingle Center Outlet
Overall Length12.000 in.
Sound LevelAggressive
Tip Quantity0
TitleFlowmaster 12512409 Super HP-2 Muffler 409S - 2.50 Center In./ 2.50 Center Out - Aggressive Sound
WARNING CA Proposition 65Yes
WARNING CA Proposition 65 MessageWARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov


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