This 3-inch inlet Borla Cat-Back system is engineered for the Chevrolet Corvette C8 Z06 5.5L V8 and includes NPP dual mode exhaust valves (there are no DFM valves on the Z06). It delivers the aggressive ATAK sound with no drone inside the vehicle and uses Borla's patented SwitchFire design to blend combustion pulses from both sides of the engine for improved performance and a custom sound. Tips are not included; the exhaust exits through the factory tips mounted in the valance, so reuse the original equipment tips or install the optional Borla tips 60740CFSB. Strategically placed heat shielding is included, and the system includes a wiring harness extender for the passenger-side NPP valve. After installation, the NPP valve controllers should be recalibrated per GM Document ID 5406413. Borla Cat-Back systems use patented straight-through, multi-core technology built from T-304 stainless steel. This system mounts behind the factory catalytic converters and is 50-state emissions legal. Borla exhaust systems are handmade in the USA.
Specifications:
- System type: Cat-Back exhaust system
- Sound level: ATAK
- Inlet diameter: 3 inch
- Configuration: includes NPP dual mode valves, SwitchFire technology
- Material: T-304 stainless steel
- Tips: not included, reuse OE tips or install optional Borla tips 60740CFSB
- Includes heat shielding and passenger-side NPP valve harness extender
- Note: NPP valve recalibration required after installation (GM Document ID 5406413)
- Emissions: 50-state emissions legal
- Made in the USA
- Part number: 140957
FAQ
Does the Borla 140957 system include exhaust tips?
No. Tips are not included. The exhaust exits through the factory tips in the valance, so reuse the OE tips or install the optional Borla tips 60740CFSB.
Is this Borla exhaust 50-state emissions legal?
Yes. As a cat-back system that mounts behind the factory catalytic converters, it is 50-state emissions legal and street legal in all states.
Is anything required after installing the 140957 system?
Yes. The NPP valve controllers should be recalibrated according to GM Document ID 5406413; Borla recommends having a Chevrolet dealer perform the recalibration. A passenger-side NPP valve wiring harness extender and heat shielding are included.
What is SwitchFire technology?
SwitchFire is Borla's patented design that blends the combustion pulses from both sides of the engine for improved performance and a custom exhaust sound.
Where is Borla exhaust made and what warranty does it carry?
Borla exhaust systems are handmade in the USA from T-304 stainless steel and are backed by Borla's Million-Mile Warranty.
