Borla CrateMuffler S-Type Big Block Chevrolet Stock Output 396/402/427 V8

Universal Fitment

Part #: 400854

Overview

The Borla 400854 CrateMuffler S-Type is a high-performance exhaust component designed specifically for big block Chevrolet engines, including the 396, 402, and 427 V8s. Crafted from durable T-304 stainless steel, this muffler is engineered to optimize both sound and power output for crate and custom-built motors. It is ideal for automotive enthusiasts and builders seeking a combination of aggressive sound and reliable performance. The CrateMuffler helps enhance exhaust flow, support engine response, and deliver a distinctive ATAK® sound that amplifies the character of your vehicle’s engine. Its purpose-built design ensures a direct fit and straightforward installation, making it a practical upgrade for performance-minded drivers.

Key Features

This CrateMuffler features a purpose-designed construction that emphasizes durability and sound quality. Its offset/offset configuration with a 2.5-inch inlet and outlet ensures optimal exhaust flow. The case measures 14 inches by 4.35 inches by 9 inches, providing a compact yet effective muffler solution. The directional design allows for precise installation, ensuring the best sound and performance characteristics. The ATAK® sound profile delivers an aggressive, deep exhaust note that enhances the driving experience. The stainless steel construction guarantees resistance to corrosion and high temperatures, supporting long-term durability and consistent performance. Borla’s engineering focus on sound tuning and flow efficiency makes this muffler a top choice for performance upgrades.

Construction & Design

Built from high-quality T-304 stainless steel, the Borla CrateMuffler is designed for durability and corrosion resistance. Its offset/offset configuration and directional design facilitate optimal exhaust flow and sound tuning. The compact case dimensions are engineered to fit seamlessly into a variety of big block Chevrolet exhaust setups, providing a balance of size and performance.

Driving Feel & Feedback

This muffler helps produce a bold, aggressive exhaust tone that enhances the vehicle’s auditory presence. It supports improved exhaust flow, which can contribute to a more responsive engine feel and a satisfying driving experience. The sound profile is designed to be noticeable without being overwhelming, adding to the vehicle’s overall character.

Installation & Fitment

Designed for straightforward installation, the CrateMuffler features a bolt-on fitment compatible with stock and custom exhaust systems for big block Chevrolet engines. Proper fitment should be verified against your specific vehicle and exhaust configuration to ensure optimal performance.

What’s Included

The package includes one Borla CrateMuffler with the specified dimensions and configuration, ready for installation on compatible big block Chevrolet engines. Hardware and mounting accessories are not included and should be sourced separately if needed.

Ideal For

Perfect for automotive enthusiasts, custom builders, and performance upgrades seeking an aggressive exhaust tone and reliable flow support for big block Chevrolet V8s.