Walker 21478 Exhaust Muffler

Overview of Walker Quiet-Flow SS Exhaust Muffler 21478

The Walker Quiet-Flow SS Exhaust Muffler 21478 is designed specifically for the Ford Explorer Sport Trac, providing a precise fit and reliable performance. Crafted from stainless steel with an aluminized finish, this muffler offers durability and corrosion resistance for extended service life.

• Specific fit for Ford Explorer Sport Trac
• Oval-shaped muffler body measuring 9 inches wide and 7 inches high
• Stainless steel construction with aluminized finish for corrosion resistance
• Inlet and outlet pipe connections with 2.25-inch inside diameters
• Overall length of 29 inches with offset inlet and outlet configurations
• Combination muffler type designed for balanced sound and performance

Detailed Product Description

This Walker Quiet-Flow SS muffler, part number 21478, features a combination muffler design that balances sound attenuation and exhaust flow. The oval body shape measures 9 inches in width, 7 inches in height, and 25 inches in body length, providing an efficient internal volume for noise reduction. Both the inlet and outlet have 2.25-inch inside diameters with pipe connection types, arranged in an offset configuration with a 2.625-inch inlet offset. The muffler is not reversible or tunable, ensuring a straightforward installation and consistent performance. Its stainless steel body with an aluminized finish enhances resistance to rust and corrosion, making it suitable for long-term use in various driving conditions.

Walker Quiet-Flow SS Product Line

The Quiet-Flow SS line by Walker focuses on delivering durable stainless steel mufflers that combine effective noise reduction with corrosion resistance. This product line is engineered to meet specific vehicle fitments, such as the Ford Explorer Sport Trac, ensuring precise installation and reliable exhaust performance. The aluminized finish further protects the muffler from environmental wear, aligning with the Quiet-Flow SS commitment to longevity and quality.

Applications and Problem Solving

• Replaces worn or damaged mufflers on Ford Explorer Sport Trac models
• Reduces exhaust noise while maintaining proper exhaust flow
• Prevents exhaust leaks caused by rust or corrosion
• Restores factory exhaust system performance and sound quality
• Addresses fitment issues with specific offset inlet and outlet configurations

Installation Notes and Tips

This muffler is designed for specific fitment on the Ford Explorer Sport Trac and requires proper alignment of the offset inlet and outlet pipe connections. Ensure the existing exhaust system matches the 2.25-inch inside diameter pipe connections before installation. Since the muffler is not reversible or tunable, verify orientation prior to final mounting. Professional installation is recommended to maintain exhaust system integrity and performance.

Quality Assurance and Warranty

Walker manufactures the Quiet-Flow SS muffler 21478 with high-grade stainless steel and an aluminized finish to resist corrosion and extend service life. While specific warranty details are not provided, Walker products typically adhere to industry standards for durability and fitment accuracy, supporting reliable exhaust system operation for the Ford Explorer Sport Trac.