Aerodynamic and power kits come to the new 911

By Jim Millick on Sun, Jun 24, 2012 3:25 PM PDT

A 991 with the Sport Design package, which includes a fixed ducktail spoiler, and the Aerokit Cup. Note the two small, extra intake openings on the front fascia. Photo courtesy Porsche

Note the Aerokit Cup rear spoiler, which uses the fixed ducktail-style spoiler and an additional top spoiler. Photo courtesy Porsche

A 991S Cabriolet with the ducktail spoiler — no Aerokit Cup spoiler. Photo courtesy Porsche

The 991S engine with the Powerkit. Photo courtesy Porsche

Just in time for summer 2012 ordering, Porsche Exclusive adds the Sports Design package and the Powerkit for the 991 Carrera S series, for both the Cabriolet and coupe models.

In the aerodynamic and style department, the 991’s Sport Design package now has available an optional ducktail rear spoiler, reminiscent of the classic 911 ducktail from the 1970s’ 911s. The Aerokit Cup adds a larger, fixed rear wing with dropped outboard edges over the ducktail spoiler and a new nose with extra vents. Is this perhaps a precursor to the forthcoming GT3’s styling?

For the S models, the Powerkit boosts the 3.8-liter’s normal 400 horses up seven percent to 430 hp, bumping up top speed by three mph and the PDK-equipped 0-60-mph time down to 3.8 seconds without affecting the European fuel economy figures. (EPA numbers aren’t available yet.) Porsche expects the Powerkit to be available in the U.S. this autumn.

The Powerkit’s release gives us the opportunity to look at the 9A1’s output in various models, via the late, noted journalist Paul Frere’s preferred measure, horsepower per liter.

3.8L Carrera S with Powerkit: 113.2
3.8L Carrera S: 105.3
3.4L Carrera: 103
3.4L Boxster S: 92.6
2.7L Boxster: 98.1