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

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Borla 2019 Chevrolet Silverado/Sierra 1500 6.2L Atak 3.5in Diameter Polyphonic Harmonizer