My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Walker Exhaust 22789 Heavy Duty Direct Fit Muffler 4" Inlet 4" Outlet

Part of: Walker Exhaust Replacement Mufflers

Other options in this family: Walker Exhaust 21467 Walker Exhaust 21040 Walker Exhaust 21475 Walker Exhaust 22920 Walker Exhaust 21838

Manufacturer

Picture for manufacturer Walker Exhaust

Part Number

22789
14 reviews
Sale Price

$173.97

Out of Stock

Notify me when available
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Walker Exhaust 22789 is a heavy-duty, direct-fit replacement muffler engineered for demanding on-road and off-road commercial vehicle applications. Featuring a 4-inch inner diameter inlet and 4-inch inner diameter outlet, this muffler is built to handle the higher exhaust flow demands of large displacement and commercial-grade engines.

Walker is a leading manufacturer of exhaust system components, offering engine-to-tailpipe coverage for domestic, import, and commercial vehicle platforms. The 22789 is part of Walker's Heavy Duty muffler line, designed to deliver reliable, long-lasting performance in rugged working conditions.

Key Features:

  • Direct-fit replacement design for simplified installation
  • 4" ID inlet and 4" ID outlet for high-flow commercial exhaust applications
  • Heavy-duty construction for extended service life in demanding environments
  • Engineered for on-road and off-road commercial vehicles
  • Part of Walker's comprehensive emissions control and exhaust replacement system lineup
  • Meets OE replacement standards for fit, form, and function

Whether you're maintaining a fleet or replacing a worn-out muffler on a single work vehicle, the Walker 22789 delivers a reliable, no-hassle replacement solution backed by one of the industry's most trusted exhaust brands.

Products specifications

Prop 65

No

Body Material

Steel

Reversible

No

Outlet Quantity

1

Inlet Quantity

1

Finish

Aluminized

Overall Length

36

Grade Type

Regular

Universal Or Specific Fit

Universal

Outlet Configuration

Offset

Outlet Inside Diameter

4

Inlet 1 Inside Diameter

4

Outlet 1 Type

Pipe Connection

Inlet Configuration

Offset

Inlet Inside Diameter

4

Body Height

11

Tunable

No

Inlet 1 Type

Pipe Connection

Outlet 1 Inside Diameter

4

Body Width

11

Inlet Type

Pipe Connection

Shape

Round

Body Length

30

Muffler Type

Combination

Outlet Type

Pipe Connection

Inlet Offset

2.5

Easy as pie

Easy to order, pricing on point.

Great company, quick delivery!!

Best price on this item.

Ordered a dog harness. It was well made fit great and came within a week

Easy deal

Best price fast shipping. will deffinitly order again

The only thing I would like to know is what the manifold kit comes with for hardware. Its not specified if they come with any hardware or gaskets at all and i would like to be prepared to do the job when they arrive in the mail.

Best Price on the Net for K&N System for my 2012 HEMI RAM. My Order 18270 is shipping today and I can't wait to get it installed!

We ordered a Impact racing helmet for $100.00 less than what we would've paid the manufacturer. We received it sooner than expected. The helmet was excellent!! We would order for this site again in the future!!! Thank you Autoplicity!!

Best price on the Internet and quick shipping

Very fast and easy ordering system. My order was shipped the next day.

So far so good!

So far so good! Just ordered the parts I needed for my car which I've been trying to find EVERYWHERE without success, until I arrived at autoplicity. Great price, and with a lifetime warranty I'm assuming great quality. I have faith that when the product arrives I will be highly satisfied.

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy