Walker 56177 Exhaust Muffler Assembly

Walker Quiet-Flow SS Muffler Assembly

Walker Quiet-Flow SS 56177 is a direct-fit exhaust muffler assembly built for select Toyota 4Runner and Lexus GX470 applications. It combines stainless-steel muffler construction with an OE-style replacement layout to support longer service life than typical aluminized mufflers.

For drivers searching for a Toyota 4Runner muffler replacement or a Lexus GX470 exhaust muffler assembly, this part number 56177 offers a factory-style fit with offset inlet and outlet flange connections.

Key Features

• Stainless steel muffler body and muffler material for improved corrosion resistance
• Direct-fit OE-style exhaust muffler assembly
• Oval muffler shape with 11-inch body diameter
• Offset inlet and outlet configuration
• 2-bolt welded flange inlet and outlet connections
• Overall length: 55.25 inches
• Inlet outside diameter: 2.5 inches
• Outlet outside diameter: 2.35 inches
• Walker Quiet-Flow SS product line for domestic and foreign vehicle applications

Product Details

Walker Quiet-Flow SS 56177 is engineered as a combination muffler assembly with stainless-steel body construction and an aluminized finish. The oval body measures 23 inches long, 11 inches wide, and 5.5 inches high, with a 2.5-inch inlet and 2.35-inch outlet. Its offset inlet and outlet layout, along with 2-bolt welded flange connections, supports OE-style exhaust routing on compatible Toyota 4Runner and Lexus GX470 models.

The Quiet-Flow SS line focuses on direct replacement fitment and stainless-steel durability. If you are replacing a worn Toyota 4Runner muffler or servicing a Lexus GX470 exhaust system, part number 56177 provides a factory-style solution for the listed applications. This part cross-references AP Exhaust 7496 and BRExhaust 283-747 for the same application.

What This Muffler Helps Address

• Rust or corrosion on an original muffler assembly
• Exhaust leaks at worn flange connections
• Excessive exhaust noise from a damaged muffler
• Fitment issues when replacing an OE-style exhaust assembly
• Need for a stainless-steel replacement on select Toyota 4Runner and Lexus GX470 vehicles

Installation Notes and Tips

Verify flange style, inlet and outlet diameter, and overall length against the original exhaust assembly before installation. This muffler uses offset inlet and outlet 2-bolt welded flange connections, so alignment with the existing exhaust routing is important for proper fitment. Confirm vehicle year and model match the listed applications for the Toyota 4Runner and Lexus GX470 before ordering.

• Fits 2018-2023 Toyota 4Runner, N/A
• Fits 2003-2017 Toyota 4Runner, N/A
• Fits 2003-2004 Lexus GX470, N/A

Quality Assurance

Walker Quiet-Flow SS muffler assemblies are built with stainless-steel construction and OE-style replacement design for the listed applications. The product notes include Premium and Limited Lifetime Warranty coverage for the 2003-2017 Toyota 4Runner and 2003-2004 Lexus GX470 fitments.