Walker 55339 Exhaust Muffler Assembly

Walker Quiet-Flow SS Muffler Assembly

Walker Quiet-Flow SS 55339 is a direct-fit exhaust muffler assembly for select Ford Expedition and Lincoln Navigator applications. It combines stainless-steel muffler construction with an OE-style replacement layout to support longer service life than typical aluminized mufflers.

Built for 2003-2014 Ford Expedition and 2003-2014 Lincoln Navigator models, this oval muffler assembly uses a 2-bolt welded flange inlet and pipe connection outlet for a factory-style exhaust repair.

Key Features

• Stainless steel muffler body and muffler material for improved corrosion resistance
• Direct-fit OE-style exhaust muffler assembly
• Oval muffler shape with 9-inch body diameter
• Offset inlet and offset outlet configuration
• 2-bolt welded flange inlet for secure exhaust connection
• Pipe connection outlet for system integration
• Walker Quiet-Flow SS product line for domestic and foreign vehicle applications
• Part number 55339 for ordering and catalog lookup

Product Details

Walker Quiet-Flow SS 55339 is an exhaust muffler assembly engineered for select full-size SUVs, including the Ford Expedition and Lincoln Navigator. The stainless-steel body and muffler construction help resist exhaust-system corrosion, while the OE-style layout supports a straightforward replacement of the original muffler assembly. With an oval profile, 26-inch body length, and 52.125-inch overall length, this assembly is built to match the packaging and routing needs of the listed applications. The 2.95-inch inlet outside diameter and 2.75-inch outlet outside diameter support proper exhaust flow through the factory-style connection points.

The Quiet-Flow SS line focuses on stainless-steel construction in a direct-fit replacement format, making it a practical choice for owners seeking a replacement muffler assembly for 2003-2014 Ford Expedition or 2003-2014 Lincoln Navigator exhaust repair. Part number 55339 is also a useful cross-reference point when comparing catalog listings for the same application.

What This Part Helps Address

• Rusted or corroded muffler housing
• Exhaust leaks at the muffler assembly
• Damaged or deteriorated factory muffler replacement needs
• Noisy exhaust caused by a failing muffler
• Fitment-matched replacement for welded exhaust service on Expedition and Navigator models

Installation Notes

Fits 2003-2014 Ford Expedition, N/A. Fits 2003-2014 Lincoln Navigator, N/A. If the original system uses a welded assembly, replace all required parts during service to restore proper exhaust sealing and alignment. Verify inlet and outlet dimensions, flange style, and overall length against the vehicle’s existing exhaust layout before installation.

Quality Assurance

Walker positions Quiet-Flow SS muffler assemblies as stainless-steel, direct-fit OE-style replacements for long-term exhaust service. This part cross-references Walker Exhaust 53447 for the same application.