This is a Borla ATAK Polyphonic Harmonizer, 3.5in diameter, for the 2019 Chevrolet Silverado/Sierra 1500 6.2L. The Polyphonic Harmonizer is Borla's in-pipe sound-tuning chamber that shapes the ATAK exhaust note and helps cancel unwanted drone while keeping the aggressive tone. It's a direct-fit component of the Borla ATAK system for this truck, built from stainless steel for durability.
| Type | ATAK Polyphonic Harmonizer |
| Diameter | 3.5in |
| Vehicle | Chevrolet Silverado/Sierra 1500 6.2L (2019) |
| Material | Stainless steel |
| Part Number | 60680 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2021 | Chevrolet | Silverado 1500 | Custom Trail Boss |
| 2019-2026 | Chevrolet | Silverado 1500 | High Country |
| 2020-2026 | Chevrolet | Silverado 1500 | LT Trail Boss |
| 2019-2026 | Chevrolet | Silverado 1500 | LTZ |
| 2020-2026 | Chevrolet | Silverado 1500 | RST |
| 2022-2026 | Chevrolet | Silverado 1500 | ZR2 |
| 2019-2026 | GMC | Sierra 1500 | AT4 |
| 2022-2026 | GMC | Sierra 1500 | AT4X |
| 2019-2026 | GMC | Sierra 1500 | Denali |
| 2022-2026 | GMC | Sierra 1500 | Denali Ultimate |
| 2019-2026 | GMC | Sierra 1500 | SLT |
Shipping: In-stock orders placed before 4 PM EST ship the same day, with standard, expedited, and overnight options available at checkout. Backordered items ship as soon as our distributor restocks — contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
