Flowmaster 80 Series Chambered Muffler 842580

  • $154.95
    Unit price per 

Flowmaster's latest version of its popular 80 Series Crossflow Muffler has a 2.50 inch inlet and outlet on the same end of the muffler case. This muffler utilizes a smaller 4.0 inch by 9.5 inch by 13.0 inch case for easier fitment on various applications and is intended for use on vehicles where a side exit in front of the rear tires is desired. Delivering a moderate to aggressive tone, this muffler is excellent for custom applications and is constructed with 409S Stainless Steel. This muffler is backed by Flowmaster's Lifetime Limited Warranty.


  • Stainless Steel Construction
  • Moderate/Aggressive Sound Performance Tone
  • Compact Configuration for Limited Spaces
  • Premium Quality


  • Universal Muffler - Not a direct fit. Some adaptation required.
Automotive Item Grade High Performance
Body Height (in) 4
Body Length (in) 13
Body Width (in) 9.5
Brand Flowmaster
California Proposition 65 Chemical Name Chromium (hexavalent compounds)
California Proposition 65 Chemical Name Nickel (Metallic)
California Proposition 65 Required Yes
Color Black
Emission Code 5
Fitment Universal
Inlet Connection Type Pipe Connection
Inlet Diameter (in) 2.5
Inlet Position Offset
Material Stainless Steel
Mount Type Uses Factory Hangers
Muffler Series 80 Series
Muffler Type Chambered
Outlet Connection Type Pipe Connection
Outlet Diameter (in) 2.5
Outlet Position Offset (Same End)
Overall Length (in) 20.5
Product Type Street Mufflers
Shape Oval
Sound Level Moderate/Aggressive Sound
Type of Muffler Chambered
Warning California Proposition 65