The Borla ATAK cat-back exhaust system is built for 2019-2023 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks with the 6.2L V8 and the factory split rear exit. It does not fit ZR2 or AT4X models. The 3.5 inch into dual 2.75 inch system uses Borla's aggressive ATAK muffler with Polyphonic Harmonizer Technology, which uses patented units with pipes of different diameters and lengths to create multiple exhaust notes that harmonize into a clean, rich, full-bodied sound with no drone inside the cabin. It exits through 3.5 inch black chrome T-304 stainless steel tips, and installation requires removal of the factory valance tips. Bright chrome and carbon fiber tip versions are also available. Borla recommends cleaning the black chrome tips with hot water and a microfiber cloth rather than stainless polish. The Polyphonic Harmonizer behind the muffler can be replaced with muffler 60679 to drop to the quieter S-Type sound level. Add adapter 60706 for crew cab models with the standard bed and 157 inch wheelbase. Borla cat-back systems use patented straight-through, multi-core technology to free hidden horsepower while adding exhaust velocity, driving excitement, and fuel economy, backed by the distinctive Borla Sound of Power. Each system is built from premium T-304 stainless steel with ultra-smooth mandrel bends and CNC-precise construction for an accurate fit. Because it mounts behind the factory catalytic converters, this cat-back system is 50-state emissions legal. Borla exhaust is handmade in the USA and backed by a Million-Mile Warranty.
Specifications:
- System type: Cat-back exhaust system
- Sound level: ATAK (most aggressive; Polyphonic Harmonizer Technology, downgradeable to S-Type with muffler 60679)
- Material: T-304 stainless steel
- Tubing: 3.5 inch into dual 2.75 inch
- Tips: 3.5 inch black chrome T-304 stainless steel
- Fitment note: Factory split rear exit only, requires removal of factory valance tips, does not fit ZR2 or AT4X; add adapter 60706 for 157 inch wheelbase crew cab standard bed
- Emissions: 50-state emissions legal
- Made in the USA
- Part number: 140776BC
Vehicle Applications:
- 2019 Chevrolet Silverado 1500
- 2020 Chevrolet Silverado 1500
- 2021 Chevrolet Silverado 1500
- 2022 Chevrolet Silverado 1500
- 2023 Chevrolet Silverado 1500
- 2019 GMC Sierra 1500
- 2020 GMC Sierra 1500
- 2021 GMC Sierra 1500
- 2022 GMC Sierra 1500
- 2023 GMC Sierra 1500
FAQ
What trucks does the Borla 140776BC fit?
It fits 2019-2023 Chevrolet Silverado 1500 and GMC Sierra 1500 models with the 6.2L V8 and the factory split rear exit. It does not fit ZR2 or AT4X models.
What tips does it use?
It exits through 3.5 inch black chrome T-304 stainless steel tips. Installation requires removal of the factory valance tips. Bright chrome and carbon fiber versions are also available.
Can the sound be made quieter?
Yes. Replacing the Polyphonic Harmonizer behind the muffler with muffler 60679 drops the system to the quieter S-Type sound level.
Is the Borla 140776BC cat-back street legal?
Yes. It installs behind the factory catalytic converters and is 50-state emissions legal. Borla exhaust is handmade in the USA and backed by the Million-Mile Warranty.
