Borla CrateMuffler LS3 3-Inch Offset Inlet/Center Outlet S-Type Muffler - Part Number 400957

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 LS3 6.2L V8 engine family. The directional design provides the classic S-Type sound and will dramatically reduce, or eliminate drone on specified applications. Add resonator 400939 to attain the mellow Touring sound. Muffler dimensions 3" Offset Inlet/ 3" Center Outlet, 6" x 10.34" 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 LS3 6.2L V8 Stock Output, 3" Offset Inlet/ 3" Center Outlet, 6" x 10.34" Oval, 14" Long Body, 19" Overall Length, S-Type. 24-26 Ford Mustang Dark Horse Dark Horse

• 3" Offset Inlet/ 3" Center Outlet, 6" x 10.34" 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.
• Add resonator 400939 to attain the Touring sound level
• CrateMuffler(r)s are tuned for specific engines

The Borla CrateMuffler Part Number 400957 is purpose-built for Chevrolet LS3 6.2L V8 engines and custom exhaust systems requiring a refined performance sound. This directional S-Type muffler uses a 3-inch offset inlet and 3-inch center outlet to deliver an aggressive, controlled exhaust note while helping reduce or eliminate drone on specified applications. The outlet is identified by the mounting bracket welded to the end cap, making proper installation orientation straightforward.

Constructed from premium T-304 stainless steel, the Borla 400957 provides excellent corrosion resistance, long-term durability, and consistent performance. Computer numerical control manufacturing supports accurate construction and dependable fitment. For a quieter, more mellow Touring sound, pair this muffler with Borla resonator Part Number 400939. The CrateMuffler design is tuned for specific engine applications rather than serving as a universal sound profile. Borla backs the CrateMuffler with its Million-Mile Warranty, reflecting the brand's focus on durable, high-performance exhaust components.

Fitment data includes select 2011-2014 Chevrolet Camaro, Chevrolet Corvette, and Chevrolet SS applications. The muffler is also listed for the 2024-2026 Ford Mustang Dark Horse, subject to the vehicle's exhaust configuration and installation requirements. Verify the complete exhaust system, engine configuration, and available clearance before installation. This product is not CARB approved and may not be legal for use on emissions-controlled vehicles in all areas.

What's Included

• One Borla CrateMuffler S-Type muffler
• Directional muffler with welded outlet mounting bracket

Features:

• LS3-Specific Tuning: Designed for Chevrolet LS3 6.2L V8 engines to provide a controlled S-Type performance sound.
• Drone Reduction: Directional internal design helps reduce or eliminate unwanted cabin drone on specified applications.
• Premium T-304 Stainless Steel: Provides superior corrosion resistance and durability compared with common T-400 series materials such as 409 stainless steel.
• Precision Manufacturing: CNC production supports accurate construction, reliable fitment, and consistent exhaust performance.

Fitments:
2008 Chevrolet Corvette Base
2009 Chevrolet Corvette Base
2010 Chevrolet Camaro SS
2010 Chevrolet Corvette Base
2010 Chevrolet Corvette Grand Sport
2011 Chevrolet Camaro SS
2011 Chevrolet Corvette Base
2011 Chevrolet Corvette Grand Sport
2012 Chevrolet Camaro SS
2012 Chevrolet Corvette Base
2012 Chevrolet Corvette Grand Sport
2013 Chevrolet Camaro SS
2013 Chevrolet Corvette Base
2013 Chevrolet Corvette Grand Sport
2014 Chevrolet Camaro SS
2014 Chevrolet SS Base
2015 Chevrolet Camaro SS
2015 Chevrolet SS Base
2016 Chevrolet SS Base
2017 Chevrolet SS Base

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