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-esi2028702
- 2019-chevrolet-silverado-1500-ltz-esi5442967
- 2019-gmc-sierra-1500-at4-esi6920583
- 2019-gmc-sierra-1500-denali-esi7270675
- 2019-gmc-sierra-1500-slt-esi9880033
- 2020-chevrolet-silverado-1500-custom-trail-boss-esi4201740
- 2020-chevrolet-silverado-1500-high-country-esi6081428
- 2020-chevrolet-silverado-1500-lt-trail-boss-esi9071825
- 2020-chevrolet-silverado-1500-ltz-esi7558185
- 2020-chevrolet-silverado-1500-rst-esi6993786
- 2020-gmc-sierra-1500-at4-esi5223074
- 2020-gmc-sierra-1500-denali-esi6539283
- 2020-gmc-sierra-1500-slt-esi5632764
- 2021-chevrolet-silverado-1500-custom-trail-boss-esi7430764
- 2021-chevrolet-silverado-1500-high-country-esi6929108
- 2021-chevrolet-silverado-1500-lt-trail-boss-esi9672961
- 2021-chevrolet-silverado-1500-ltz-esi2243099
- 2021-chevrolet-silverado-1500-rst-esi6342922
- 2021-gmc-sierra-1500-at4-esi5550097
- 2021-gmc-sierra-1500-denali-esi1257873
- 2021-gmc-sierra-1500-slt-esi3249051
- 2022-chevrolet-silverado-1500-high-country-esi4299527
- 2022-chevrolet-silverado-1500-lt-trail-boss-esi3082708
- 2022-chevrolet-silverado-1500-ltz-esi7758399
- 2022-chevrolet-silverado-1500-rst-esi4935420
- 2022-chevrolet-silverado-1500-zr2-esi7714469
- 2022-gmc-sierra-1500-at4-esi2670948
- 2022-gmc-sierra-1500-at4x-esi7130224
- 2022-gmc-sierra-1500-denali-esi2740607
- 2022-gmc-sierra-1500-denali-ultimate-esi1087949
- 2022-gmc-sierra-1500-slt-esi6515929
- 2023-chevrolet-silverado-1500-high-country-esi2774831
- 2023-chevrolet-silverado-1500-lt-trail-boss-esi7793044
- 2023-chevrolet-silverado-1500-ltz-esi9935600
- 2023-chevrolet-silverado-1500-rst-esi3612849
- 2023-chevrolet-silverado-1500-zr2-esi3272131
- 2023-gmc-sierra-1500-at4-esi3173312
- 2023-gmc-sierra-1500-at4x-esi3753717
- 2023-gmc-sierra-1500-denali-esi8683021
- 2023-gmc-sierra-1500-denali-ultimate-esi7742747
- 2023-gmc-sierra-1500-slt-esi2275165
- 2024-chevrolet-silverado-1500-high-country-esi6622674
- 2024-chevrolet-silverado-1500-lt-trail-boss-esi1914563
- 2024-chevrolet-silverado-1500-ltz-esi7660278
- 2024-chevrolet-silverado-1500-rst-esi2621154
- 2024-chevrolet-silverado-1500-zr2-esi6328719
- 2024-gmc-sierra-1500-at4-esi5926512
- 2024-gmc-sierra-1500-at4x-esi8222253
- 2024-gmc-sierra-1500-denali-esi7182099
- 2024-gmc-sierra-1500-denali-ultimate-esi1996406
- 2024-gmc-sierra-1500-slt-esi6961990
- 2025-chevrolet-silverado-1500-high-country-esi3694306
- 2025-chevrolet-silverado-1500-lt-trail-boss-esi7883447
- 2025-chevrolet-silverado-1500-ltz-esi5603540
- 2025-chevrolet-silverado-1500-rst-esi8740334
- 2025-chevrolet-silverado-1500-zr2-esi7976784
- 2025-gmc-sierra-1500-at4-esi3072543
- 2025-gmc-sierra-1500-at4x-esi5925650
- 2025-gmc-sierra-1500-denali-esi4182840
- 2025-gmc-sierra-1500-denali-ultimate-esi4474460
- 2025-gmc-sierra-1500-slt-esi3975696
- 2026-chevrolet-silverado-1500-high-country-esi3187544
- 2026-chevrolet-silverado-1500-lt-trail-boss-esi7063761
- 2026-chevrolet-silverado-1500-ltz-esi2011883
- 2026-chevrolet-silverado-1500-rst-esi1340974
- 2026-chevrolet-silverado-1500-zr2-esi5119624
- 2026-gmc-sierra-1500-at4-esi4013423
- 2026-gmc-sierra-1500-at4x-esi8623199
- 2026-gmc-sierra-1500-denali-esi7734082
- 2026-gmc-sierra-1500-denali-ultimate-esi8564221
- 2026-gmc-sierra-1500-slt-esi8551658
- 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