One of these is not like the others. Active exhaust valves may not be the first things that come to mind when talking about cool car tech, but they’re techie nonetheless, and definitely cool.
When a button is pressed inside the cabin, cars equipped with this function open (or close) special butterfly valves inside the exhaust, unleashing or quelling the full sonic fury of the powerplant on the other side. This is especially helpful on loud cars like the Jaguar F-Type R, which can easily set off car alarms with its throaty V8 soundtrack. Simply hit the switch and the car quiets down to civilian levels … at least until the next straightaway.