Borla Specialty Muffler

Universal Fitment

Part #: 401664

Overview

The Borla 401664 Specialty Muffler is a high-performance exhaust component designed for truck applications and other vehicles requiring a long body muffler. Crafted with durability and efficiency in mind, this muffler features a 2.75-inch inlet and outlet, a 6.75-inch diameter, and a 24-inch body length, making it suitable for a variety of heavy-duty and custom exhaust setups. Its universal design ensures compatibility across multiple vehicle types, and the reversible construction allows for flexible installation options. Built to support optimal exhaust flow, this muffler helps improve sound quality and exhaust efficiency while maintaining a robust, heavy-duty construction that withstands demanding conditions. Whether you're upgrading your truck's exhaust system for enhanced sound or replacing a worn-out component, this specialty muffler offers reliable performance and long-lasting durability. Its un-notched neck design simplifies installation and ensures a secure fit, making it an excellent choice for custom exhaust builds or replacement needs.

Key Features

This specialty muffler combines thoughtful design with practical benefits, including:

• Heavy-duty construction with a durable steel body
• Un-Notched neck for easy installation and secure fitment
• Long body design optimized for truck and heavy-duty applications
• Reversible design for flexible orientation during installation
• Enhanced exhaust flow for improved sound and performance
• Universal fitment suitable for a variety of vehicle models
• 6.75-inch round diameter for effective sound attenuation and flow
• Overall length of 29 inches for compatibility with custom exhaust setups

Construction & Design

The Borla Specialty Muffler features a heavy-duty steel shell designed to withstand harsh conditions and resist corrosion. Its un-notched neck and straight flow design promote efficient exhaust flow, reducing backpressure and supporting engine performance. The muffler’s long, cylindrical body is engineered for durability and effective sound attenuation, making it ideal for trucks and other heavy-duty vehicles requiring a robust exhaust component.

Installation & Fitment

This muffler is designed for universal fitment, allowing for versatile installation across a range of vehicles. Its reversible design simplifies orientation during installation, and the straightforward mounting points facilitate a secure and reliable setup. As a universal part, fitment should be verified against your specific vehicle and exhaust system requirements.

What’s Included

The package includes one Borla Specialty Muffler with the specified dimensions and features, ready for installation as part of your custom or replacement exhaust system.

Ideal For

This muffler is ideal for truck owners and enthusiasts seeking a durable, high-quality exhaust component that enhances sound and performance while supporting heavy-duty applications. It’s perfect for custom exhaust builds, replacement projects, or upgrading existing systems for improved durability and sound quality.