Borla CrateMuffler

Universal Fitment

Part #: 400942

Overview

The Borla 400942 CrateMuffler is a high-performance exhaust component designed specifically for crate and custom-built big block Chrysler engines, including the 383, 413, 426, and 440 cubic inch displacements. Crafted from durable T-304 stainless steel, this oval muffler combines robust construction with optimized sound and power characteristics. It is ideal for enthusiasts seeking a balance of aggressive tone, reliable durability, and enhanced exhaust flow. Whether you're restoring a classic muscle car or building a custom project, this muffler helps deliver a distinctive S-Type sound while supporting your vehicle’s performance goals. Designed for those who demand quality and sound control, the CrateMuffler offers a direct bolt-on replacement that enhances the exhaust note without sacrificing reliability. Its offset/offset inlet and outlet configuration ensures compatibility with a variety of big block Chrysler applications, making it a versatile choice for performance-minded builders and restorers alike.

Key Features

The Borla CrateMuffler features a precision-engineered design focused on durability and sound quality. Made from T-304 stainless steel, it provides excellent corrosion resistance and longevity. Its oval shape and offset/offset configuration optimize exhaust flow and sound tuning, helping to produce the signature S-Type exhaust tone. The muffler’s directional design ensures proper airflow and sound directionality, contributing to a refined yet aggressive exhaust note. Its compact dimensions (14 inches x 4.35 inches x 9 inches) make it suitable for a variety of chassis setups, while the welded mounting bracket ensures secure installation.

Construction & Design

Constructed from high-grade T-304 stainless steel, the Borla CrateMuffler is built to withstand harsh conditions and resist corrosion. Its oval case shape and offset inlet/outlet design are engineered for optimal exhaust flow and sound tuning. The directional outlet, identified by the welded bracket on the endcap, ensures correct airflow direction and sound projection, enhancing the overall exhaust experience.

Driving Feel & Feedback

This muffler helps produce a deep, aggressive S-Type exhaust tone that enhances the driving experience. It supports a more engaging sound profile while maintaining a refined and controlled exhaust note. The design aims to improve exhaust flow, which can contribute to a slight increase in throttle response and engine efficiency, especially in high-performance applications.

Installation & Fitment

The Borla CrateMuffler is designed as a direct bolt-on replacement for compatible big block Chrysler engines. Its offset/offset inlet and outlet dimensions simplify installation, requiring minimal modifications. Proper fitment should be verified against your vehicle’s specific configuration and the part number provided.

What’s Included

The package includes the Borla CrateMuffler with welded mounting bracket, ready for installation. Additional hardware or clamps are not included and may be required depending on your existing exhaust system setup.