This Borla S-Type Cat-Back exhaust system was designed for the 6.2L V8 Chevrolet Silverado 1500 and GMC Sierra 1500. This 2.5 inch inlet into 2.75 inch pipes system is a True Dual design that fits factory split rear exit trucks only and includes a valve simulator to keep the Check Engine Light off. The muffler contains an internal X-Pipe for added performance and improved sound. Installation requires cutting the factory Y-Pipe. Tips are not included; the system reuses the factory tips. The classic S-Type sound level delivers a sportier, refined tone with no drone inside the cabin. Borla Cat-Back and Axle-Back systems use patented straight-through, multi-core technology to free up hidden horsepower, and the added exhaust velocity brings more power, driving excitement, and the distinctive Borla Sound of Power. The system is built from premium T-304 austenitic stainless steel with ultra-smooth mandrel bends and CNC manufacturing for an accurate, long-lasting fit. Like all Borla exhaust, it is handmade in the USA. As a street Cat-Back system that mounts behind the factory catalytic converters, it is 50-state emissions legal. It is backed by the Borla Million-Mile Warranty.
Specifications:
- System type: S-Type Cat-Back exhaust
- Sound level: S-Type
- Design: True Dual with internal X-Pipe
- Pipe diameter: 2.5 in inlet into 2.75 in
- Valve simulator included
- Fitment: factory split rear exit only; requires cutting the factory Y-Pipe
- Tips: not included; reuse factory tips
- Construction: fully welded
- Material: T-304 stainless steel
- Emissions: 50-state emissions legal
- Made in the USA
- Part number: 140999
Vehicle Applications:
- 2024 Chevrolet Silverado 1500
- 2025 Chevrolet Silverado 1500
- 2024 GMC Sierra 1500
- 2025 GMC Sierra 1500
FAQ
Which vehicles does the Borla 140999 Cat-Back fit?
It fits the 2024-2025 Chevrolet Silverado 1500 and GMC Sierra 1500 with the 6.2L V8 and factory split rear exit, excluding ZR2 and AT4X models.
Is the Borla 140999 legal for street use?
Yes. It is a street Cat-Back system with a valve simulator that mounts behind the factory catalytic converters, so it is 50-state emissions legal.
Why does this system include a valve simulator?
The valve simulator keeps the Check Engine Light from coming on after the factory exhaust is replaced.
Does this system include tips?
No. Tips are not included. The system reuses the factory tips, and versions that include tips are also offered.
Where is Borla exhaust made and is it warrantied?
Borla exhaust is handmade in the USA and is backed by the Borla Million-Mile Warranty.
