$289.99

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.
ATAK Polyphonic Harmonizer 2019-2023 Chevrolet Silverado 1500/ GMC Sierra 1500 6.2L V8 Automatic Transmission 2 & 4 Wheel Drive With Borla “S-TYPE” Cat-Back System
2019-2023 Chevrolet Silverado 1500/ GMC Sierra 1500 6.2L V8 Automatic Transmission 2 & 4 Wheel Drive With BORLA “S-TYPE” Cat-Back System.

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.
ATAK Polyphonic Harmonizer 2019-2023 Chevrolet Silverado 1500/ GMC Sierra 1500 6.2L V8 Automatic Transmission 2 & 4 Wheel Drive With Borla “S-TYPE” Cat-Back System
2019-2023 Chevrolet Silverado 1500/ GMC Sierra 1500 6.2L V8 Automatic Transmission 2 & 4 Wheel Drive With BORLA “S-TYPE” Cat-Back System.

Fitment
2019 Chevrolet Silverado 1500
2019 GMC Sierra 1500
2020 Chevrolet Silverado 1500
2020 GMC Sierra 1500
2021 Chevrolet Silverado 1500
2021 GMC Sierra 1500
2022 Chevrolet Silverado 1500
2022 Chevrolet Silverado 1500 LTD
2022 GMC Sierra 1500
2022 GMC Sierra 1500 Limited
2023 Chevrolet Silverado 1500
2023 GMC Sierra 1500