Walker 22789 Exhaust Muffler

Walker Heavy Duty 22789 Exhaust Muffler

Walker Heavy Duty 22789 is a universal round exhaust muffler built for commercial and hard-working on-road or off-road applications. With a 4-inch offset pipe connection on both the inlet and outlet, this aluminized steel muffler is sized for direct fabrication into custom exhaust systems where durable replacement coverage is needed.

Key Features

• Universal fit exhaust muffler for custom or replacement exhaust work
• Round, combination-style muffler design
• 4-inch inlet and 4-inch outlet with offset pipe connections
• Aluminized steel body for corrosion resistance in demanding service
• 36-inch overall length with an 11-inch body width and 11-inch body height
• Walker Heavy Duty line coverage for commercial vehicle exhaust applications

Product Details

Walker Heavy Duty focuses on exhaust solutions for commercial vehicles that see frequent stop-and-go use, long duty cycles, and exposure to road debris and weather. Part number 22789 uses a steel body with an aluminized finish and a round profile to support exhaust system fabrication where a 4-inch pipe connection is required. The offset inlet and outlet configuration helps match routing needs in custom exhaust layouts. This part cross-references Gates 3700 for the same application.

Common Exhaust Issues It Can Address

• Damaged or rusted muffler body in a 4-inch exhaust system
• Excessive exhaust noise from a worn muffler
• Restricted exhaust flow caused by internal muffler deterioration
• Need for a replacement muffler in a fabricated commercial exhaust setup
• Mismatch between existing pipe routing and a standard center-in/center-out muffler layout

Installation Notes and Tips

Verify inlet and outlet diameter, offset dimensions, and overall length before installation. Because this is a universal muffler, fitment depends on the exhaust system layout rather than a specific year, make, or model. Confirm clearance around the 36-inch body length and 11-inch body dimensions during fabrication. Walker 22789 is commonly selected for custom exhaust work on commercial vehicles, including applications where a durable replacement muffler is needed for Ford, Chevrolet, or Dodge truck-based exhaust systems.

Quality Assurance

Walker offers broad muffler coverage for replacement emissions and exhaust system applications across domestic, import, and commercial vehicles. The Heavy Duty line is positioned for demanding service environments where durable construction and application coverage matter.