Replace the small muffler behind the primary muffler in the Borla(r) S-Type system with Polyphonic Harmonizer 60680 to attain the ATAK(r) sound level (louder than S-Type). Borla(r) 'S Polyphonic Harmonizer Technology utilizes patented units that contain pipes of different diameters and lengths to create multiple exhaust notes that harmonize to deliver a clean, rich, full-bodied sound to the Borla(r) mufflers. The mufflers then enhance this sound to the character and volume appropriate for our Touring, S-Type and ATAK(r) systems. 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. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all, Borla(r) stands behind every Polyphonic Harmonizer with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.
This Part Fits:
| Year | Make | Model | Submodel |
|---|
| 2020-2021 | Chevrolet | Silverado 1500 | Custom Trail Boss |
| 2019-2024 | Chevrolet | Silverado 1500 | High Country |
| 2020-2024 | Chevrolet | Silverado 1500 | LT Trail Boss |
| 2019-2024 | Chevrolet | Silverado 1500 | LTZ |
| 2020-2024 | Chevrolet | Silverado 1500 | RST |
| 2022-2024 | Chevrolet | Silverado 1500 | ZR2 |
| 2022 | Chevrolet | Silverado 1500 LTD | Custom Trail Boss |
| 2022 | Chevrolet | Silverado 1500 LTD | High Country |
| 2022 | Chevrolet | Silverado 1500 LTD | LT Trail Boss |
| 2022 | Chevrolet | Silverado 1500 LTD | LTZ |
| 2022 | Chevrolet | Silverado 1500 LTD | RST |
| 2019-2025 | GMC | Sierra 1500 | AT4 |
| 2024 | GMC | Sierra 1500 | AT4X |
| 2019-2024 | GMC | Sierra 1500 | Denali |
| 2024 | GMC | Sierra 1500 | Denali Ultimate |
| 2019-2024 | GMC | Sierra 1500 | SLT |
| 2022 | GMC | Sierra 1500 Limited | AT4 |
| 2022 | GMC | Sierra 1500 Limited | Denali |
| 2022 | GMC | Sierra 1500 Limited | SLT |
