Walker 53740 Exhaust Muffler Assembly - Left

Walker Quiet-Flow SS Muffler Assembly

Walker Quiet-Flow SS 53740 is a direct-fit exhaust muffler assembly built for the left side of select Ford Mustang applications. It combines stainless-steel construction with an OE-style replacement layout to support longer service life than typical aluminized mufflers.

Compatible with 2005-2009 Ford Mustang, left, this muffler assembly is shaped as an oval unit with an offset inlet and offset outlet for a factory-style exhaust connection. The 2.5-inch pipe connection inlet and 3-inch tip outlet help maintain the original exhaust routing and appearance.

Key Features

• Walker Quiet-Flow SS 53740 direct-fit muffler assembly
• Fits 2005-2009 Ford Mustang, left
• Stainless-steel muffler body and stainless-steel muffler material
• Oval muffler shape with combination muffler design
• Offset inlet and offset outlet configuration
• 2.5-inch inlet inside diameter with 3-inch outlet tip
• OE-style replacement for factory exhaust service

Product Details

Walker Quiet-Flow SS 53740 is part of the Quiet-Flow SS product line, which focuses on direct-fit exhaust replacement with stainless-steel construction for broad-market domestic and foreign vehicle coverage. For 2005-2009 Ford Mustang left-side applications, this muffler assembly is built with a 14-inch body length, 9.75-inch body width, 4.25-inch body height, and 27.375-inch overall length. The aluminized finish is paired with a stainless-steel body and oval profile to match OE-style exhaust packaging. This part cross-references CSF 2458 for the same application.

Common Issues It Can Address

• Rust or corrosion in the original muffler assembly
• Exhaust noise caused by a worn internal muffler structure
• Factory exhaust fitment problems after replacement work
• Damaged or deteriorated left-side muffler housing
• Loss of OE-style exhaust routing and tip alignment

Installation Notes and Tips

Verify left-side fitment before installation and compare the inlet and outlet configuration to the original part. Confirm the 2.5-inch pipe connection inlet and 3-inch tip outlet match the vehicle’s exhaust layout on your Ford Mustang. Because this is a direct-fit muffler assembly, proper alignment with the existing exhaust path is important for a clean installation.

Quality Assurance

Walker Quiet-Flow SS muffler assemblies are engineered as OE-style replacements with stainless-steel construction for extended service life compared with typical aluminized mufflers. This part is listed for 2005-2009 Ford Mustang, left, and is backed by the product line’s premium limited lifetime warranty coverage noted in the fitment data.