Walker 54491 Exhaust Muffler Assembly - Rear

Walker Quiet-Flow SS Muffler Assembly

Walker Quiet-Flow SS 54491 is a direct-fit exhaust muffler assembly for rear applications on select Nissan Murano models. It combines stainless-steel muffler construction with an OE-style replacement layout to support longer service life than typical aluminized mufflers.

Built for 2003-2007 Nissan Murano rear fitment, this Walker Quiet-Flow SS muffler assembly is shaped as an oval combination muffler with offset inlet and outlet routing for factory-style exhaust alignment. Part number 54491 is also referenced for the same application as AP Exhaust 7551 and BRExhaust 145-127.

Key Features

• Direct-fit exhaust muffler assembly for rear installation
• Stainless steel muffler and body construction
• Oval muffler shape with combination muffler design
• 2-inch inlet and 2-inch outlet connections
• Offset inlet and outlet configuration for OE-style routing
• Broad-market stainless-steel construction for extended service life
• Walker Quiet-Flow SS product line for OE-style replacement applications

Detailed Description

Walker Quiet-Flow SS 54491 is engineered as an OE-style replacement muffler assembly for the rear of 2003-2007 Nissan Murano models. The stainless steel muffler material and stainless steel body help resist corrosion better than standard aluminized designs, while the oval body profile and offset pipe connections support factory-like exhaust routing. With a 2-inch inlet outside diameter, 2-inch outlet outside diameter, and overall length of 43.625 inches, this assembly is built around the dimensions needed for a direct replacement on the listed vehicle application. The Quiet-Flow SS line focuses on stainless-steel construction and direct-fit coverage for domestic and foreign vehicles, making 54491 a practical choice when replacing a worn rear muffler on a Nissan Murano.

What This Muffler Helps Address

• Rust or corrosion in the rear muffler assembly
• Exhaust noise from a deteriorated muffler
• Factory exhaust fitment issues after replacement repairs
• Damaged or leaking rear exhaust housing
• Need for an OE-style stainless steel replacement on a Nissan Murano

Installation Notes and Tips

Fits 2003-2007 Nissan Murano, rear. Verify inlet and outlet routing, flange style, and overall length against the original exhaust before installation. This muffler assembly uses a 2-bolt welded flange and pipe connection layout, so matching the existing exhaust configuration is important for proper alignment. Confirm clearance around the oval body and rear exhaust path before final tightening.

Quality Assurance

Walker Quiet-Flow SS 54491 is part of Walker’s stainless-steel Quiet-Flow SS line, which is positioned as a direct-fit OE-style replacement for long-term exhaust service. The stainless steel construction is the key quality feature called out by the manufacturer for improved durability versus typical aluminized mufflers.