Borla 19 Chevrolet Silverado/GMC Sierra 1500 6.2L SS ATAK Catback Exhaust - Carbon Fiber TipsFactory Split Rear Exit Vehicles ONLY. This system features unique BORLA? carbon fiber tips with bright centers. Add adapter 60706 for crew cab standard bed (6' 7") 157" wheelbase vehicles. System features BORLA?'s Polyphonic Harmonizer Technology which 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