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Muffler for 2003 GMC Sierra 2500

We have 34 Items In-stock. Select your vehicle's Submodel to continue.

Flowmaster - 50 Series Heavy Duty Mufflers


Flowmaster’s 50 Series Heavy-Duty mufflers turn your truck into something a little more enjoyable to drive, making it more fuel efficient, faster and easier on your vehicle’s powertrain – especially good when you’re under load or towing. Flowmaster, known as ‘the exhaust technology company,’ is a leading manufacturer of high performance exhaust systems and respected for design, innovation and engineering.

  • Increases torque and horsepower while reducing noise – great for heavy-duty trucks
  • 3-year warranty for aluminized steel, lifetime warranty for stainless steel
  • Fully MIG-welded for maximum strength
  • Come in stainless steel and 16-gauge aluminized steel
  • Quick and easy installation
  • Dyno-tested
  • Designed primarily for Dodge trucks with Hemis
  • Increases torque, horsepower and fuel economy – perfect for tow vehicles/heavy loads
  • Perfect for diesel and/or gas vehicles
  • Features unique 3-chamber design
Flowmaster Muffler, Flowmaster 50 Series Heavy Duty, Aluminized Steel, Natural
$191.86 List Price $250.80 Save $58.94 Availability: In Stock
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  • SKU#: F13853558
  • Product Fit: Universal
  • Sound Level: Moderate
  • Recommended Use: Performance
  • Anticipated Ship Out Time: 1-2 Business Days
  • Attachment Style: Weld-On
  • Case Shape: Oval
  • Height: 5 in.
  • Inlet Location: Offset
  • Inlet Quantity: Single
  • Inlet Size: 3.5 in.
  • Internal Construction: 3 Chamber
  • Outlet Location: Offset
  • Outlet Quantity: Single
  • Outlet Size: 3.5 in.
  • Overall Length: 18 in.
  • Warranty: Lifetime Flowmaster Limited Warranty
  • Width: 10 in.
see more Fits the following 2003 GMC Sierra 2500 submodels:
  • All Engines | All Submodels