Walker 56315 Exhaust Muffler Assembly

Walker Quiet-Flow SS Muffler Assembly

Walker Quiet-Flow SS 56315 is a direct-fit exhaust muffler assembly built with a stainless-steel body for longer service life than typical aluminized mufflers. It is made for specific vehicle applications and uses OE-style flange connections to support a clean replacement on the exhaust system.

Compatible with 2015-2021 Lexus NX300h and 2016-2018 Toyota RAV4 applications, this muffler assembly follows the original fitment layout with a 2-bolt welded flange inlet and outlet. The oval stainless-steel body measures 27.000 inches long, 11.000 inches wide, and 5.500 inches high, with an overall length of 70.960 inches.

Key Features

• Stainless-steel body construction for improved corrosion resistance
• Direct-fit OE-style exhaust muffler assembly
• Oval muffler shape with welded hanger design
• Single inlet and single outlet configuration
• 2-bolt welded flange inlet and outlet connections
• Specific fit for selected Lexus and Toyota applications
• Walker Quiet-Flow SS line for replacement exhaust service

Product Details

Walker Quiet-Flow SS 56315 is part of the Quiet-Flow SS product line, which focuses on stainless-steel replacement mufflers for domestic and foreign vehicles. This part number is built as a specific-fit assembly rather than a universal muffler, helping match the original exhaust routing and connection style on the listed vehicles. The inlet outside diameter measures 2.593 inches and the outlet outside diameter measures 2.126 inches, with an inlet offset and welded hanger type for OE-style placement. This part cross-references 1742036220 for the same application.

Common Exhaust Issues It Can Address

• Rust or corrosion in the original muffler body
• Exhaust noise caused by a worn internal muffler structure
• Leaks at the muffler housing or flange connection points
• Fitment problems from a damaged or previously repaired exhaust assembly
• Replacement needs on a Lexus NX300h or Toyota RAV4 exhaust system

Installation Notes and Tips

Confirm the vehicle year, make, and model before installation. This muffler assembly uses 2-bolt welded flange inlet and outlet connections, so the existing exhaust flanges should be inspected for wear, distortion, or corrosion before assembly. Because no gasket or seal is included, verify the sealing surfaces and select the correct sealing components for the vehicle if needed. The part is not reversible and is not tunable.

Quality Assurance

Walker Quiet-Flow SS muffler assemblies are engineered as stainless-steel OE-style replacements for long-term exhaust service. Part number 56315 is built for specific fitment on the listed Lexus and Toyota applications and follows the Quiet-Flow SS construction approach for replacement durability.