This Borla Cat-Back system is engineered specifically for the 2024-2025 Chevrolet Silverado 1500 ZR2 and GMC Sierra 1500 AT4X 6.2L V8 4WD. The 3.5in diameter system exits through dual 2.75in turndown tail pipes and delivers Borla's classic S-Type sound with no in-cabin drone, and includes a valve simulator to prevent a Check Engine Light. Add Polyphonic Harmonizer 60680 to step up to the louder ATAK sound level. Patented straight-through multi-core technology with mandrel bends maximizes flow and power; built from premium T-304 stainless steel.
| Type | Cat-Back exhaust system |
| Sound | S-Type (no drone) - ATAK with Harmonizer 60680 |
| System Diameter | 3.5in |
| Tips | Dual 2.75in turndown tail pipes |
| Electronics | Valve simulator (prevents Check Engine Light) |
| Material | T-304 austenitic stainless steel - mandrel-bent |
| Warranty | Million-Mile Warranty |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2024-2025 | Chevrolet | Silverado 1500 | ZR2 |
| 2024-2025 | GMC | Sierra 1500 | AT4 |
