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-esi6537965
- 2019-chevrolet-silverado-1500-ltz-esi3002899
- 2019-gmc-sierra-1500-at4-esi7594230
- 2019-gmc-sierra-1500-denali-esi4814314
- 2019-gmc-sierra-1500-slt-esi5130700
- 2020-chevrolet-silverado-1500-custom-trail-boss-esi9827891
- 2020-chevrolet-silverado-1500-high-country-esi8248867
- 2020-chevrolet-silverado-1500-lt-trail-boss-esi6638572
- 2020-chevrolet-silverado-1500-ltz-esi5788701
- 2020-chevrolet-silverado-1500-rst-esi7266184
- 2020-gmc-sierra-1500-at4-esi7884615
- 2020-gmc-sierra-1500-denali-esi4844808
- 2020-gmc-sierra-1500-slt-esi4956101
- 2021-chevrolet-silverado-1500-custom-trail-boss-esi2006787
- 2021-chevrolet-silverado-1500-high-country-esi8469544
- 2021-chevrolet-silverado-1500-lt-trail-boss-esi9155607
- 2021-chevrolet-silverado-1500-ltz-esi7957321
- 2021-chevrolet-silverado-1500-rst-esi8262457
- 2021-gmc-sierra-1500-at4-esi5072538
- 2021-gmc-sierra-1500-denali-esi8141889
- 2021-gmc-sierra-1500-slt-esi2723938
- 2022-chevrolet-silverado-1500-high-country-esi8161041
- 2022-chevrolet-silverado-1500-lt-trail-boss-esi1961593
- 2022-chevrolet-silverado-1500-ltz-esi8066234
- 2022-chevrolet-silverado-1500-rst-esi6507076
- 2022-chevrolet-silverado-1500-zr2-esi1311308
- 2022-gmc-sierra-1500-at4-esi5800240
- 2022-gmc-sierra-1500-at4x-esi3090094
- 2022-gmc-sierra-1500-denali-esi5742298
- 2022-gmc-sierra-1500-denali-ultimate-esi8241473
- 2022-gmc-sierra-1500-slt-esi1618560
- 2023-chevrolet-silverado-1500-high-country-esi4871941
- 2023-chevrolet-silverado-1500-lt-trail-boss-esi9708520
- 2023-chevrolet-silverado-1500-ltz-esi4688571
- 2023-chevrolet-silverado-1500-rst-esi1848459
- 2023-chevrolet-silverado-1500-zr2-esi3011772
- 2023-gmc-sierra-1500-at4-esi9965454
- 2023-gmc-sierra-1500-at4x-esi3707236
- 2023-gmc-sierra-1500-denali-esi8689938
- 2023-gmc-sierra-1500-denali-ultimate-esi5093817
- 2023-gmc-sierra-1500-slt-esi5990756
- 2024-chevrolet-silverado-1500-high-country-esi2028473
- 2024-chevrolet-silverado-1500-lt-trail-boss-esi5421061
- 2024-chevrolet-silverado-1500-ltz-esi3422262
- 2024-chevrolet-silverado-1500-rst-esi5315254
- 2024-chevrolet-silverado-1500-zr2-esi6150355
- 2024-gmc-sierra-1500-at4-esi5513627
- 2024-gmc-sierra-1500-at4x-esi3725200
- 2024-gmc-sierra-1500-denali-esi3314181
- 2024-gmc-sierra-1500-denali-ultimate-esi9429191
- 2024-gmc-sierra-1500-slt-esi2427919
- 2025-chevrolet-silverado-1500-high-country-esi8315365
- 2025-chevrolet-silverado-1500-lt-trail-boss-esi6912678
- 2025-chevrolet-silverado-1500-ltz-esi3504138
- 2025-chevrolet-silverado-1500-rst-esi8956761
- 2025-chevrolet-silverado-1500-zr2-esi3073613
- 2025-gmc-sierra-1500-at4-esi3156463
- 2025-gmc-sierra-1500-at4x-esi3988886
- 2025-gmc-sierra-1500-denali-esi9793635
- 2025-gmc-sierra-1500-denali-ultimate-esi8102508
- 2025-gmc-sierra-1500-slt-esi5428740
- 2026-chevrolet-silverado-1500-high-country-esi3136057
- 2026-chevrolet-silverado-1500-lt-trail-boss-esi8935436
- 2026-chevrolet-silverado-1500-ltz-esi4309383
- 2026-chevrolet-silverado-1500-rst-esi6856929
- 2026-chevrolet-silverado-1500-zr2-esi1908420
- 2026-gmc-sierra-1500-at4-esi5064542
- 2026-gmc-sierra-1500-at4x-esi8804151
- 2026-gmc-sierra-1500-denali-esi1848833
- 2026-gmc-sierra-1500-denali-ultimate-esi1120019
- 2026-gmc-sierra-1500-slt-esi9751772
- 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