Is the 718 Cayman not enough? For those that want more power from the mid-engine flat-four, there's only one Porsche that can suffice that need, the 718 Cayman GTS. Serving as the range-topping version of the Cayman lineup, the GTS has a boosted 2.5-liter engine, a better-looking exterior and interior, as well as other performance upgrades like torque vectoring, active suspension, and the Sport Chrono Package.