Replace the small muffler behind the primary muffler in the BORLA® S-Type system with Polyphonic Harmonizer 60680 to attain the ATAK® sound level (louder than S-Type). BORLA®'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® mufflers. The mufflers then enhance this sound to the character and volume appropriate for our Touring, S-Type and ATAK® 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® 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 |
| 2019-2026 | 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 |
- 2019-chevrolet-silverado-1500-high-country-esi9859219
- 2019-chevrolet-silverado-1500-ltz-esi7093397
- 2019-gmc-sierra-1500-at4-esi4403765
- 2019-gmc-sierra-1500-denali-esi8820787
- 2019-gmc-sierra-1500-slt-esi7520521
- 2020-chevrolet-silverado-1500-custom-trail-boss-esi3371859
- 2020-chevrolet-silverado-1500-high-country-esi7666827
- 2020-chevrolet-silverado-1500-lt-trail-boss-esi2478499
- 2020-chevrolet-silverado-1500-ltz-esi6008974
- 2020-chevrolet-silverado-1500-rst-esi9331872
- 2020-gmc-sierra-1500-at4-esi4298052
- 2020-gmc-sierra-1500-denali-esi1950204
- 2020-gmc-sierra-1500-slt-esi1968994
- 2021-chevrolet-silverado-1500-custom-trail-boss-esi3220117
- 2021-chevrolet-silverado-1500-high-country-esi4661634
- 2021-chevrolet-silverado-1500-lt-trail-boss-esi8977676
- 2021-chevrolet-silverado-1500-ltz-esi1112866
- 2021-chevrolet-silverado-1500-rst-esi9177743
- 2021-gmc-sierra-1500-at4-esi1636367
- 2021-gmc-sierra-1500-denali-esi3633566
- 2021-gmc-sierra-1500-slt-esi8106573
- 2022-chevrolet-silverado-1500-high-country-esi1945604
- 2022-chevrolet-silverado-1500-lt-trail-boss-esi1711386
- 2022-chevrolet-silverado-1500-ltz-esi7593314
- 2022-chevrolet-silverado-1500-rst-esi7859937
- 2022-chevrolet-silverado-1500-zr2-esi2427376
- 2022-gmc-sierra-1500-at4-esi9614060
- 2022-gmc-sierra-1500-at4x-esi8934028
- 2022-gmc-sierra-1500-denali-esi9807024
- 2022-gmc-sierra-1500-denali-ultimate-esi4455403
- 2022-gmc-sierra-1500-slt-esi1304432
- 2023-chevrolet-silverado-1500-high-country-esi3994115
- 2023-chevrolet-silverado-1500-lt-trail-boss-esi2452859
- 2023-chevrolet-silverado-1500-ltz-esi6964537
- 2023-chevrolet-silverado-1500-rst-esi1475788
- 2023-chevrolet-silverado-1500-zr2-esi8527535
- 2023-gmc-sierra-1500-at4-esi1042302
- 2023-gmc-sierra-1500-at4x-esi9487746
- 2023-gmc-sierra-1500-denali-esi8296928
- 2023-gmc-sierra-1500-denali-ultimate-esi5188686
- 2023-gmc-sierra-1500-slt-esi2990469
- 2024-chevrolet-silverado-1500-high-country-esi6355433
- 2024-chevrolet-silverado-1500-lt-trail-boss-esi5023773
- 2024-chevrolet-silverado-1500-ltz-esi3006373
- 2024-chevrolet-silverado-1500-rst-esi4244251
- 2024-chevrolet-silverado-1500-zr2-esi4768747
- 2024-gmc-sierra-1500-at4-esi7830644
- 2024-gmc-sierra-1500-at4x-esi6445078
- 2024-gmc-sierra-1500-denali-esi2805221
- 2024-gmc-sierra-1500-denali-ultimate-esi8068946
- 2024-gmc-sierra-1500-slt-esi4138037
- 2025-chevrolet-silverado-1500-high-country-esi6111254
- 2025-chevrolet-silverado-1500-lt-trail-boss-esi6010713
- 2025-chevrolet-silverado-1500-ltz-esi8370004
- 2025-chevrolet-silverado-1500-rst-esi7623844
- 2025-chevrolet-silverado-1500-zr2-esi4530108
- 2025-gmc-sierra-1500-at4-esi9521335
- 2025-gmc-sierra-1500-at4x-esi6289240
- 2025-gmc-sierra-1500-denali-esi5155788
- 2025-gmc-sierra-1500-denali-ultimate-esi1843397
- 2025-gmc-sierra-1500-slt-esi2964568
- 2026-chevrolet-silverado-1500-high-country-esi1983331
- 2026-chevrolet-silverado-1500-lt-trail-boss-esi7446931
- 2026-chevrolet-silverado-1500-ltz-esi8006901
- 2026-chevrolet-silverado-1500-rst-esi7371981
- 2026-chevrolet-silverado-1500-zr2-esi7302922
- 2026-gmc-sierra-1500-at4-esi9254087
- 2026-gmc-sierra-1500-at4x-esi9591012
- 2026-gmc-sierra-1500-denali-esi8433728
- 2026-gmc-sierra-1500-denali-ultimate-esi4907335
- 2026-gmc-sierra-1500-slt-esi4788222
- ClearanceItem:N
- EPA:N/A
- Fabrication>Clamps
- fits_2019-2023`Chevrolet`Silverado 1500`Custom~2019-2023`Chevrolet`Silverado 1500`Custom Trail Boss~2019-2023`Chevrolet`Silverado 1500`High Country~2019-2023`Chevrolet`Silverado 1500`LT~2019-2023`Chevrolet`Silverado 1500`LT Trail Boss
- fits_2019-2023`GMC`Sierra 1500`AT4~2022-2023`GMC`Sierra 1500`AT4X~2019-2021`GMC`Sierra 1500`Base~2019-2023`GMC`Sierra 1500`Denali~2022-2023`GMC`Sierra 1500`Denali Ultimate~2019-2023`GMC`Sierra 1500`Elevation~2022-2023`GMC`Sierra 1500`Pro
- fits_2019-2023`GMC`Sierra 1500`SLT~2022`GMC`Sierra 1500 Limited`AT4~2022`GMC`Sierra 1500 Limited`Denali~2022`GMC`Sierra 1500 Limited`Elevation~2022`GMC`Sierra 1500 Limited`Pro~2022`GMC`Sierra 1500 Limited`SLE~2022`GMC`Sierra 1500 Limited`SLT
- fits_2022`Chevrolet`Silverado 1500 LTD`High Country~2022`Chevrolet`Silverado 1500 LTD`LT~2022`Chevrolet`Silverado 1500 LTD`LT Trail Boss~2022`Chevrolet`Silverado 1500 LTD`LTZ~2022`Chevrolet`Silverado 1500 LTD`RST~2022`Chevrolet`Silverado 1500 LTD`SSV
- fits_2023`Chevrolet`Silverado 1500`PPV~2019-2023`Chevrolet`Silverado 1500`RST~2019-2021`Chevrolet`Silverado 1500`SSV~2019-2023`Chevrolet`Silverado 1500`WT~2022-2023`Chevrolet`Silverado 1500`ZR2~2022`Chevrolet`Silverado 1500 LTD`Custom
- LTL:N
- MPN:60680
- Non-CARB:N
- Prop65:Y
- SpecialOrder:N