Quiet exhaust drone and keep spent gases flowing with the Walker Quiet-Flow SS Exhaust Muffler 21481. Backed by the manufacturer's Direct Fit design, it drops in as a bolt-on replacement for the 2004–2012 Chevrolet Colorado and GMC Canyon, with a 2.5" inlet (ID) and 2.5" outlet (ID). See the "Vehicles it fits" section to confirm the exact year, engine, and configuration for your vehicle.
- 100% Stainless-Steel Construction: The only broad-market muffler built with 100% stainless steel for longer life versus aluminized mufflers, plus an internal drainage system that helps reduce moisture collection.
- Direct-Fit, Bolt-On Install: Comes with OE-style pipe routings, brackets, and hangers so it installs without specialized fabrication or welding.
- Built to Last: Internal partitions and mechanically joined tubes allow expansion and contraction during temperature changes to minimize distortion, while spun-locked heads and OE-style spot welds add stability.
- Premium Acoustic Control: OE-style louvered tubes and domed heads help lower and reduce radiated noise for factory-style sound quality, acoustic- and flow-tested for quality.
Covered by Walker's limited lifetime warranty and the exclusive 90-Day Safe and Sound Guarantee; visit Walkerexhaust.com for details.
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Frequently Asked Questions
What vehicles does the Walker 21481 muffler fit?
It's a direct-fit muffler for the 2004–2012 Chevrolet Colorado and GMC Canyon. Check the "Vehicles it fits" section to confirm the exact year, engine, and configuration for your vehicle.
What are the inlet and outlet sizes?
This muffler has a 2.5" inlet (ID) and a 2.5" outlet (ID).
What is the 21481 muffler made of?
The Quiet-Flow SS muffler features 100% stainless-steel construction for longer life versus aluminized mufflers, plus an internal drainage system that helps reduce moisture collection.
Does installation require welding?
No. It's a bolt-on, direct-fit replacement with OE-style hangers, brackets, and pipe routings, so no specialized fabrication or welding is needed.
Is the muffler covered by a warranty?
Yes. It comes with Walker's limited lifetime warranty and the exclusive 90-Day Safe and Sound Guarantee. Visit Walkerexhaust.com for details.
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