Borla Performance ATAK CrateMuffler - Chevrolet Big Block 396/402/427 V8 (400854)
Optimize the acoustics and unleash the real power of your classic muscle car or custom build with the Borla Performance ATAK CrateMuffler. As part of the world's first muffler lineup engineered specifically to complement the unique sound signatures and flow dynamics of crate and custom-built motors, this specialized component is custom-tuned for the stock-output Chevrolet Big Block 396, 402, and 427 cubic-inch displacement (CID) V8 engine family. Featuring Borla's most aggressive Acoustically Tuned Applied Kinetics (ATAK) technology, this muffler delivers a high-decibel, race-inspired exhaust note that retains ultimate structural clarity without distortion, all while dramatically reducing or completely eliminating unpleasant interior cabin drone.
Engineered to handle the immense exhaust volume of classic high-displacement engines, this oval-body muffler is manufactured from premium T-304 austenitic stainless steel to provide lifelong protection against rust, discoloration, and structural degradation. The internal design features a directional straight-through configuration, ensuring maximum exhaust gas velocity and minimized backpressure. For easy identification during custom fabrication, the outlet end comes equipped with a pre-welded mounting bracket directly on the endcap. Measuring 14 inches in case length and 19 inches in overall length, this 2.5-inch offset inlet and offset outlet muffler is proudly made in the USA and backed by a lifetime Million-Mile Warranty.
Features
- Purpose-built CrateMuffler design optimized specifically for stock-output Chevrolet Big Block V8 engines
- Delivers Borla's most aggressive, high-volume ATAK sound profile with a clear, crisp exhaust note
- Custom acoustic tuning drastically reduces or eliminates drone inside the passenger cabin
- Premium T-304 austenitic stainless steel build provides maximum long-term structural durability
- Directional flow construction features a pre-welded installation mounting bracket on the outlet endcap
- Utilizes a 2.5" offset inlet and 2.5" offset outlet for versatile custom exhaust packaging
- Proudly manufactured in the USA and backed by Borla's iconic lifetime Million-Mile Warranty
Specifications & Dimensions
- Engine Application: Chevrolet Big Block 396 / 402 / 427 CID V8 (Stock Output)
- Inlet Diameter / Configuration: 2.5" - Offset Position
- Outlet Diameter / Configuration: 2.5" - Offset Position (Features Welded Bracket)
- Muffler Sound Level: ATAK (Most Aggressive)
- Muffler Case Shape: Oval
- Muffler Case Length: 14"
- Muffler Case Height: 4.35"
- Muffler Case Width: 9.10"
- Overall Component Length: 19"
*Note: This is a universal-fit fabrication component intended for custom exhaust applications. It is directional and must be oriented correctly. For optimal performance and balanced acoustics on dual exhaust systems, two mufflers are required. Clamps, piping, and installation hardware are not included.
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
