Dynomax 17221 Exhaust Muffler

Ultra Flo Welded Universal Muffler; Oval; 3 in. Inlet/Outlet; 4.5 in. H x 9.75 in. W x 14 in. Muffler L/19 in. Overall L; Offset/Center; Reversible; Stainless Steel

Fits: 08-10 Ford F-250 Super Duty, 08-10 Ford F-350 Super Duty, 09-12 Chevrolet Colorado, 09-12 GMC Canyon

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DynoMax(R) Ultra Flo(TM) Welded performance stainless steel mufflers feature 100-percent welded construction for lifelong durability. The unrestricted, straight-through design dyno proven to flow up to 2,000 SCFM and support up to 2,000 horsepower. Each muffler uses our exclusive Continuous Roving Fiberglass (CRF) Technology to absorb unwanted interior resonance while maintaining a deep performance tone. The 'Pure Unadulterated POWER' of DynoMax(R) Ultra Flo(TM) Welded mufflers are backed by a Limited Lifetime Warranty and exclusive 90-Day Performance & Sound Guarantee(TM).

BRAND: Dynomax


  • 100% Welded Construction For Lifelong durability
  • CRF Technology Absorbs Unwanted Interior Resonance
  • Straight-Through Design Ensures Unrestricted Exhaust Flow
  • 2010-2008 Ford F-250 Super Duty; 2010-2008 Ford F-350 Super Duty; 2012-2009 Chevrolet Colorado; 2012-2009 GMC Canyon
  • Dyno Proven To Flow Up To 2000 SCFM And Support Up To 2000 HP
  • Reduces Back pressure
  • Exclusive Continuous Roving Fiberglass Technology
  • Limited Lifetime Warranty
  • Unrestricted Straight-Through Design
  • Dynomax Muffler
  • Dynomax Ultra Flo Welded Universal Muffler
  • DynoMax Ultra-Flo Welded Muffler
  • DynoMax Ultra Flo Welded Muffler
  • Maintains A Deep Performance Tone
  • Proudly Manufactured In The USA
  • Constructed Using All 409 Stainless Steel


Automotive Item GradeHigh Performance Part
Body Length14.000 in.
Inlet Connection TypePipe
Inlet Diameter DesignationInside Diameter
Inlet Inside Diameter3.000 in.
Inlet Outside Diameter3.000 in.
Inlet PositionOffset
Inlet Quantity1
Main Piping Diameter3.000 in.
MaterialStainless Steel
Max Year Covered2012
Min Year Covered2008
Most Popular Make/ModelFord F-250 Super Duty
Most Popular Year2008
Muffler Body FinishBare
Muffler Body Height4.500 in.
Muffler Body Length14.000 in.
Muffler Body MaterialStainless Steel
Muffler Body ShapeOval
Muffler Body Width9.750 in.
Muffler Inlet Diameter3.000 in.
Muffler Outlet Diameter3.000 in.
Muffler Overall Length19.000 in.
Muffler ReversibleYes
Muffler TypeAbsorption
Outlet ConfigurationCenter
Outlet Connection TypePipe
Outlet Diameter DesignationInside Diameter
Outlet PositionCenter
Outlet Quantity1
Outlet TypePipe Connection
Overall Length19.000 in.
Product GradePremium
Tip Quantity0
Total Part VIO238976
WARNING CA Proposition 65No

Oval; 3 in. Inlet/Outlet; 4.5 in. H x 9.75 in. W x 14 in. Muffler L/19 in. Overall L; Offset/Center; Reversible; Stainless Steel



  • 2008-2010 Ford F-350 Super Duty
  • 2009-2012 Chevrolet Colorado
  • 2008-2010 Ford F-250 Super Duty
  • 2009-2012 GMC Canyon
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