when i decided to get the gm accessory, i called borla to get the specs cause gm parts couldnt tell me. borla california retail told me it was their touring system, lowest level sound upgrade. 100% false. its the "S" type. i was referred to borla OE division in Tenn. they said i was one of many to complain about a super loud startup, m80 goin off. they have a fix and it was a new front pipe with an added resonator. i just got it installed and there is zero difference. not sure what im gonna do yet. def back burner for now and enjoy the truck.