Installation Time
(approx) 2 Hours
Difficulty Level:
Mechanical expertise or professional installation required.
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$52.00
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Features, Description, Reviews, Q&A, Specs & Installation
Unleash Your Sierra's Missing Growl. If you're looking to squeeze some more noise out of your Sierra, consider swapping the muffler with a performance-inspired replacement, such as this Magnaflow 3.50-Inch Round Glasspack Performance Muffler. This muffler features a classic glasspack design with straight-through routing and minimal packing, producing a deep, aggressive growl fit for a heavy-duty pickup.Â
Enhanced Performance. With its straight-through design, this muffler cuts down on the backpressure of the factory exhaust system and increases flow. As a result, you’ll enjoy more power and better fuel economy.Â
Classic Appearance. The Magnaflow Glasspack is a blast from the past, featuring the classic glasspack styling popularized by hot-rodders in the 60s and 70s. This muffler features a long and narrow form factor and bright red corrosion-resistant coating, guarding the underlying alloy against rust and oxidation.Â
Warranty. A limited 90-day warranty covers this product against manufacturing defects.Â
Application. This Magnaflow 3.50-Inch Round Glasspack Performance Muffler fits all 2020-2024 GMC Sierra 2500s.
Magnaflow 13134
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation Info
Installation Time
(approx) 2 Hours
Difficulty Level:
Mechanical expertise or professional installation required.
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