Borla CrateMuffler ATAK Muffler for Chevrolet Big Block 396/402/427 V8, Part Number BOR400852

BORLA(r)'s CrateMuffler(r) is the world's first muffler purpose-built to optimize the sound & power of crate and custom built motors. The mufflers are directional. The outlet can be identified by the mounting bracket welded to the endcap. This muffler is tuned for the Chevrolet Big Block 396/ 402/ 427 CID V8 engine family. The directional design provides the agressive ATAK(r) sound and will dramatically reduce, or eliminate drone on specified applications. Muffler Dimensions 2.5" Offset Inlet/ 2.5" Center Outlet, 4.35" x 9.10" Oval, 14" Long Body, 19" Overall Length. Built from premium T-304 stainless steel, superior to T-400 series (such as 409), to give you the absolute best in performance and durability. Precision computer numerical control (CNC) manufacturing ensures an accurate fit and best of all, BORLA(r) stands behind every CrateMuffler(r) with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand. CrateMuffler, Chevrolet Big Block 396/ 402/ 427 CID V8 Stock Output, 2.5" Offset Inlet/ 2.5" Center Outlet, 4.35" x 9.10" Oval, 14" Long Body, 19" Overall Length, ATAK. Fits models without Active Exhaust 24-26 Ford Mustang GT GT

• 2.5" Offset Inlet/ 2.5" Center Outlet, 4.35" x 9.10" Oval, 14" Long Body, 19" Overall Length
• When installed on cataloged applications, they will reduce, or eliminate drone
• Mufflers have directional flow. Outlet end has mounting bracket on it.
• CrateMuffler(r)s are tuned for specific engines

Brief Description: The Borla CrateMuffler ATAK muffler is purpose-built for crate and custom-built engines, delivering aggressive exhaust sound while helping reduce or eliminate unwanted drone on specified applications. Part number BOR400852 is tuned for Chevrolet Big Block 396, 402, and 427 CID V8 engines and features directional flow for correct installation and optimized performance.

Constructed from premium T-304 stainless steel, this muffler offers excellent corrosion resistance, durability, and long-term performance compared with lower-grade stainless materials. Computer numerical control manufacturing supports consistent fitment and precise construction, while Borla's Million-Mile Warranty reflects the brand's confidence in its exhaust products. The outlet end is identified by the welded mounting bracket, so orientation should be confirmed before installation.

Fitment: This CrateMuffler is tuned for Chevrolet Big Block 396/402/427 CID V8 engines. The supplied application data also lists 2024-2026 Ford Mustang GT models without Active Exhaust; verify vehicle configuration, exhaust routing, and engine compatibility before purchase. Professional installation is recommended when custom exhaust modifications or application-specific adjustments are required.

What's Included: One Borla CrateMuffler ATAK directional muffler. Inlet and outlet connections, mounting orientation, and exhaust system compatibility should be confirmed with the vehicle or custom exhaust configuration before installation.

Features:

• Aggressive ATAK sound: Delivers Borla's performance-oriented exhaust tone for crate and custom-built engines.
• Engine-specific tuning: Designed for Chevrolet Big Block 396, 402, and 427 CID V8 engine families.
• Directional flow design: The outlet is identified by the welded mounting bracket for proper installation orientation.
• Premium stainless construction: Made from T-304 stainless steel for enhanced durability, corrosion resistance, and long-term performance.

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1