15% OFF ORDERS $35+ | 20% OFF $100+ | ONLINE ONLY
USE CODE
CRUISE
*
Exclusions apply.
Advance Auto Parts Logo
Choose a Store
  • Shop All
  • Replacement Parts
  • Performance Parts
  • Accessories
  • Oil & Fluids
  • Special Offers
  • Advance Rewards
  • Advice & How-Tos
  • Project Guides
  • FAQ / Help Desk
Loading...
Share
Product thumb
Product thumb
Product thumb
Product thumb
Product thumb
Product main large

Walker Quiet-Flow SS Direct Fit Exhaust Muffler Assembly 2.375" Inlt ID 2.38" Inlt OD 2.25" Outlt OD

(7 reviews)
Part # 54721
limited lifetime warranty
Loading...
Loading...
How Would You Like To Get This Item?

Store Pickup

Loading...Loading...Loading...

Same Day Home Delivery

Loading...Loading...Loading...

Home Delivery

Loading...Loading...Loading...
Loading...
Loading...
Loading...Loading...Loading...Loading...Loading...

Product Information

Product Details
Part No. 54721
Warranty Details (Limited Lifetime Warranty)
Combining the only broad-market stainless-steel body construction with a direct-fit OE-style replacement, Walker Quiet-Flow SS muffler assemblies deliver longer life than typical aluminized mufflers. Quiet-Flow SS muffler assemblies are available for domestic and foreign vehicles.

Product Features:
  • CORROSION RESISTANT STAINLESS STEEL -- The only broad-market muffler with 100┬á% stainless-steel construction that delivers longer life versus aluminized mufflers while an internal drainage system reduces moisture collection
  • EASY TO INSTALL -- Direct-fit bolt-on replacement solution with OE-style hangers, brackets and pipe routings for easy installation and doesn't require specialized fabrication and/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 provide stability and longer service life
  • PREMIUM ACOUSTIC CONTROL -- OE-style louvered tubes lower noise levels while OE-style domed heads help reduce radiated noise for premium factory-style sound quality compared to straight perforated tubes
  • DESIGN VALIDATED -- Acoustic and flow tested for quality OE-style sound you can count on
  • BUY WITH CONFIDENCE -- Comes with Walker's limited lifetime warranty and exclusive 90-Day Safe and Sound Guarantee. Visit Walkerexhaust.com for details.
Specifications
Body Diameter:
11.000 in

Body Height:
5.500 in

Body Length:
27.000 in

Body Material:
Stainless Steel

Body Width:
11.000 in

Finish:
Aluminized

Gasket Or Seal Included:
No

Grade Type:
Premium

Inlet 1 Inside Diameter:
2.375 in

Inlet 1 Outside Diameter:
2.38 in

Inlet 1 Type:
Pipe Connection

Inlet Configuration:
Offset

Inlet Inside Diameter:
2.375 in

Inlet Outside Diameter:
2.380 in

Inlet Quantity:
1

Inlet Type:
Pipe Connection

Muffler Shape:
Oval

Muffler Type:
Combination

Outlet Configuration:
Offset

Outlet Outside Diameter:
2.250 in

Outlet Quantity:
1

Outlet Type:
2 Bolt Welded Flange

Overall Length:
45.625 in
Loading...
Loading...Loading...Loading...Loading...Loading...
3.71 out of 5
7 Customer Reviews
75% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
4
4 Stars
1
3 Stars
0
2 Stars
0
1 Star
2
Pros
3
Great Sound
2
Easy To Install
1
Lightweight
1
Much Cheaper Than Oem
Cons
1
Difficult To Install
1
Have To Cut Exhaust Pipe
Best Uses
3
Everyday Driving
3
Replacement
1
NA
Describe Yourself
3
Auto Enthusiast
1
Casual Driver
Reviewed by 7 Customers
poor assembly of product
Verified Buyer -
This is my third muffler, replacingvabout every three year due to rusting out. However this last muffler did not fit well. Appears the welding jig was off when the inlet pipe was attached. Muffler is up against the floorboard and thumps floor. No way to adjust. Going to call Advance Monday and see if I can swap this muffler for another one. Expect a fight. I only use these as Toyota insists on selling a one piece cat, muffler and tailpipe for $1200.
Poor Design
Verified Buyer -
Product was not properly aligned in jig to make accurate bends to the muffler pipe and the support brackets. Caused the muffler to contact the body of the vehicle, without correcting these deficiencies.
Bottom Line No, I would not recommend to a friend
Beat the OE cost by $1670!
Verified Buyer -
[@] wanted $1800 to replace the muffler on my RAV4. They wouldn't separate it from the resonator directly in front of it, so the part alone cost $1200. I bought this muffler and handed it to a local shop who put it on for $40. Took 20 minutes.
I would buy this product again.
Verified Buyer -
The muffler with associated piping was a near prefect fit. Very pleased.
Perfect fit and quality
Verified Buyer -
Fit was perfect and works as intended. No issues at, plus much cheaper than ANYWHERE else.
Bottom Line Yes, I would recommend to a friend
Loading...
Loading...Loading...Loading...Loading...Loading...
No results
Loading...
Loading...Loading...Loading...Loading...Loading...
Feedback
Be The First To Know About Deals And Promotions.
Plus, create an account to receive $5 off of $20 or more.
TOP REPLACEMENT PARTS
Brake Pads & Shoes
Brake Rotors
Alternators
Water Pumps
Starters
Brake Calipers

Order Lookup

Help Desk

Store Locator

In Store Services

Mobile App

CUSTOMER SUPPORT
Accessibility Statement
Contact Us
Forgot Password
Help Desk
In Store Pickup
In Store Services
Order Tracking
Recall Information
Return Policy
Same Day Delivery
© 2026 Advance Auto Parts
Privacy Policy
Terms of Use
Site Map
ADVANCING A WORLD IN MOTION®