Walker 21476 Exhaust Muffler

Walker Heavy Duty 21476 Exhaust Muffler

Walker Heavy Duty 21476 is a universal round exhaust muffler built for commercial and hard-working on/off-road applications. It uses aluminized steel construction with 3-inch pipe connections at both the inlet and outlet, making it a practical replacement for heavy-duty exhaust systems.

The Walker Heavy Duty line focuses on replacement mufflers for demanding vehicle use, with coverage aimed at domestic, import, and commercial applications. This 21476 muffler is a combination-type design with offset inlet and outlet configuration for straightforward exhaust routing.

Key Features

• Universal fit exhaust muffler for heavy-duty service
• Round body shape with aluminized steel finish
• 3-inch inlet and 3-inch outlet pipe connection
• Offset inlet and outlet configuration
• Combination muffler type for replacement exhaust applications
• Overall length: 36.25 inches
• Body dimensions: 8.375 inches wide by 8.375 inches high

Product Details

Walker 21476 is designed as a universal exhaust muffler for commercial vehicles that need a durable replacement component. The aluminized steel body helps support long-term exhaust service, while the round shape and offset pipe connections make it suitable for custom or direct replacement exhaust work where 3-inch piping is required. This part cross-references Atlantic Automotive Engineering 3655 for the same application.

For buyers searching for a Walker 21476 muffler for Chevrolet P30 or GMC P3500 applications, this part matches the listed heavy-duty fitment for 1989-1991 GMC P3500 and 1990-1991 Chevrolet P30. It is also a relevant search match for Walker Heavy Duty 21476 exhaust muffler replacement needs on those commercial chassis.

Common Uses

• Replacing a worn or rusted heavy-duty muffler
• Restoring exhaust flow on commercial chassis
• Addressing exhaust noise from a damaged muffler body
• Repairing offset 3-inch exhaust routing
• Supporting exhaust service on Chevrolet P30 and GMC P3500 platforms

Installation Notes

Verify inlet and outlet orientation before installation, since this muffler is not reversible. Confirm 3-inch pipe sizing and offset configuration against the existing exhaust layout. Arc welded construction is recommended for commercial use on the listed Chevrolet P30 and GMC P3500 applications.

Quality Assurance

Walker offers broad muffler coverage for replacement emissions control systems and commercial vehicle exhaust applications. The Heavy Duty line is built around practical fitment, durable materials, and application-specific exhaust replacement needs.