Walker 55605 Exhaust Muffler Assembly

Walker Quiet-Flow SS Muffler Assembly

Walker Quiet-Flow SS muffler assembly Part Number 55605 is a direct-fit exhaust muffler replacement built with stainless steel body and muffler construction. It is made for 2006-2008 Lexus RX400h and 2006-2007 Toyota Highlander applications, with OE-style pipe connection and welded flange outlet details for a factory-style exhaust repair.

Key Features

• Stainless steel body and muffler material for longer service life than typical aluminized mufflers
• Direct-fit muffler assembly for OE-style replacement
• Oval muffler shape with natural finish
• Offset inlet and offset outlet configuration
• 2-inch inlet inside diameter and 2-inch outlet inside diameter
• Pipe connection inlet with 2-bolt welded flange outlet
• Overall length of 52 inches for application-specific exhaust fitment

Product Details

The Quiet-Flow SS line from Walker focuses on stainless-steel construction and direct-fit replacement design for domestic and foreign vehicles. Part Number 55605 uses an oval, reflection-style muffler assembly layout with a 21-inch body length, 11.5-inch body width, and 6-inch body height. This configuration supports a factory-like exhaust repair on the Lexus RX400h and Toyota Highlander while maintaining the correct inlet and outlet geometry for the listed applications. This part cross-references AP Exhaust (e.g., 7505, 54788) for the same application.

Common Problems This Part Can Address

• Rust-through or corrosion in the original muffler assembly
• Exhaust noise caused by a damaged muffler body
• Fitment issues from a previous non-OE-style exhaust repair
• Leak points at the inlet or welded flange connection
• Replacement needs on a welded exhaust assembly

Installation Notes and Tips

Fits 2006-2008 Lexus RX400h, N/A. Fits 2006-2007 Toyota Highlander, N/A. If the vehicle uses a welded exhaust assembly, replace all required related parts during service so the system aligns correctly. Verify inlet and outlet orientation, flange style, and overall length before installation to match the original exhaust routing. Part Number 55605 is built for direct-fit replacement, so proper alignment with the existing exhaust path is important for a clean installation.

Quality Assurance

Walker Quiet-Flow SS muffler assemblies are built with stainless-steel construction and OE-style replacement fitment. The manufacturer notes limited lifetime warranty coverage for the listed applications.