My list of my favorite items, I am sure I am missing some stuff
four-piston Brembo calipers
TAPshift
launch control
ambient LED lighting technology
Bluetooth
Premium Boston Acoustics audio system with subwoofer
USB connectivity
Dual exhaust with x-pipe
Stripes - heritage-inspired stripes are offered in RS style for the hood or "hockey stick" style side design
Performance parts - numerous performance-enhancing components, including a tuned air intake, cat-back exhaust system, a Hurst short-throw shifter as well as more traditional GM Performance Parts