Walker Exhaust Exhaust Muffler Assembly P/N:54251
Quiet the drone and keep your exhaust flowing cleanly with the Walker Quiet-Flow SS Exhaust Muffler Assembly 56177. This direct-fit bolt-on assembly drops in as a replacement for the 2003-2004 Lexus GX470 and the 2003-2017 Toyota 4Runner, with a 2.5" inlet (OD) and a 2.35" outlet (OD). See the Buyer's Guide tab for engine-level fitment.
Acoustic- and flow-tested for OE-style sound, and backed by Walker's limited lifetime warranty and the exclusive 90-Day Safe and Sound Guarantee.
Interchange: 1742050220
This part cross-references / interchanges with the following part numbers:
What vehicles does the Walker 56177 muffler fit?
It is a direct-fit replacement for the 2003-2004 Lexus GX470 and the 2003-2017 Toyota 4Runner. Check the Buyer's Guide tab to confirm your exact vehicle and engine.
What are the inlet and outlet sizes?
This assembly has a 2.5" inlet (OD) and a 2.35" outlet (OD).
Is welding required to install this muffler?
No. It is a direct-fit bolt-on solution with factory-style hangers, brackets and pipe routings, so no specialized fabrication or welding is needed.
What is the muffler body made of?
It uses 100% stainless-steel construction, which Walker builds to provide longer life than typical aluminized mufflers, plus an internal drainage system that reduces moisture collection.
Does this muffler come with a warranty?
Yes. It is backed by Walker's limited lifetime warranty and the exclusive 90-Day Safe and Sound Guarantee. Visit Walkerexhaust.com for details.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.