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Flowmaster Super HP-2 Muffler 409SS

Part # 12512409 Be the first to write a review

Super HP-2 Muffler 409SS - 2.50 Center In./ 2.50 Center Out - Aggressive Sound

Flowmaster Super HP-2 Muffler 409SS

Estimated Ship Date: 07/01/2026
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Advertised Price $169.95
$152.95
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Emissions

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.

See Emissions Details

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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.

Features:

  • Stainless Steel Construction
  • Dyno Tuned For Maximum Performance
  • Lifetime Limited Warranty
  • Laminar Flow Technology
Body Height4.00 IN
Body Length12.00 IN
Body Material409 Stainless Steel
Body Width5.00 IN
Brand Flowmaster
California Proposition 65Yes
CategoryExhaust
Clamps IncludedNo
ColorBlack
Emission Code5
Exhaust Tip Quantity0
Sold Separately
FinishHigh-Temperature Paint
FitmentUniversal
Grade TypePerformance
Hanger IncludedNo
Heat Shield AttachedNo
Inlet ConnectionSlip-Fit
Inlet Diameter2.50 IN
Inlet Inside Diameter2.50 IN
Inlet LocationCenter
Inlet Outside Diameter2.63 IN
Inlet Quantity1
Inlet TypeClamp-On
Weld-On
Muffler SeriesHP-2 Series
Muffler TypeLaminar Flow
Outlet ConnectionSlip-Fit
Outlet Inside Diameter2.50 IN
Outlet LocationCenter
Outlet Outside Diameter2.63 IN
Outlet Quantity1
Outlet TypeSingle
Overall Length18.00 IN
part typeExhaust Muffler
Product TypeStreet Mufflers
ReversibleNo
ShapeOval
Sound LevelAggressive
Sub CategoryMufflers
TunableNo
Universal Or Specific FitUniversal
Vehicle Type4/6 CYL Engine
Classic Muscle Car
Late Model Muscle Car
Street Rod
Street/Strip
Truck/SUV
UPC700042030194
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
Part Number12512409
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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.
Instructions - Flowmaster Warranty 26 Update.pdf
Instructions - street_applications.pdf
Universal Muffler - Not a direct fit. Some adaptation required.

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    *Free Shipping and Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

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