The turbos are coming!

Porsche rounded out its 718 lineup Monday with the official world debut of the 2017 Cayman.If you're familiar with the new 718 Boxster lineup which debuted earlier this year in Geneva, the technical specifications of the new Cayman shouldn't come as any surprise.

The most significant change is under the hood, where the naturally aspirated flat-six engines of the previous model are gone. The new base engine is a two-liter, turbocharged four-cylinder engine producing 300 horsepower and 280lb-ft of torque. Stepping up to the Cayman S will get you a 2.5-liter engine that boasts 350 horsepower and 309lb-ft.

For those keeping score at home, those are 25-horsepower bumps over each of the flat-sixes they replace. Porsche claims (conservatively) that the base Cayman will only need 4.5 seconds to hit 60 miles per hour; the S, Porsche says, should do it in 4.0 flat.

Porsche also re-engineered the suspension (which was expected, given the weight and packaging differences compared to the old flat-six) and upgraded the brakes to account for the 718's increased performance. Like the Boxster, the Cayman should be available with a six-speed manual transmission or seven-speed PDK twin-clutch automatic.

Options such as torque vectoring and various individual upgrades will also be available, per the norm.

The new 718 Cayman brings with it another first for the lineup. For as long as both models have existed, Porsche charged its customers extra for the privilege of having a roof that doesn't go anywhere. No longer. Starting with the new model, the Cayman will now be priced below the equivalent Boxster.

MSRP for the new Cayman will start at $54,950 (including destination); the S will start at $67,350. Place your orders, folks. The new Cayman will reach U.S. shores by November.

Live photos by Ronan Glon.