Tame exhaust drone and keep spent gases flowing with the Walker Quiet-Flow SS Exhaust Muffler 21640, a direct-fit bolt-on replacement for the 2002-2004 Jeep Grand Cherokee. It routes through a 2.5" inlet (ID) and a 2.25" outlet (ID), and installs using OE-style brackets, hangers and pipe routings, so no specialized fabrication or welding is required.
- 100% stainless-steel construction: corrosion-resistant and built to last longer than aluminized mufflers, with an internal drainage system that helps reduce moisture collection.
- Built to last: internal partitions and mechanically joined tubes let the muffler expand and contract through temperature changes to minimize distortion, while spun-locked heads and OE-style spot welds add stability and service life.
- Premium acoustic control: OE-style louvered tubes lower noise levels and OE-style domed heads help reduce radiated noise for factory-style sound compared with straight perforated tubes.
- Design validated: acoustically and flow tested for OE-style sound.
Backed by Walker's limited lifetime warranty and exclusive 90-Day Safe and Sound Guarantee. See the "Vehicles it fits" section for engine-specific application details.
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What vehicle does the Walker 21640 muffler fit?
It's a direct-fit replacement for the 2002-2004 Jeep Grand Cherokee. Check the "Vehicles it fits" section to confirm the exact engine application for your vehicle.
What are the inlet and outlet sizes?
It has a 2.5" inlet (inside diameter) and a 2.25" outlet (inside diameter).
What is this muffler made of?
100% stainless steel, which resists corrosion and lasts longer than aluminized mufflers. An internal drainage system helps reduce moisture collection.
Do I need to weld or fabricate anything to install it?
No. It's a direct-fit bolt-on replacement with OE-style brackets, hangers and pipe routings, so no specialized fabrication or welding is required.
Is this muffler warrantied?
Yes. It comes with Walker's limited lifetime warranty and the exclusive 90-Day Safe and Sound Guarantee.
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