Details include a new front spoiler, fixed rear spoiler with winglets and revised rear fascia.
Customers can order the Aerokit in the car's body color or in high-gloss black.
Aerodynamic tuning was done in the wind tunnel and on the track at the Porsche Development Center in Weissach.
The kit is available on new and existing 911 Turbo and 911 Turob S models. It can be ordered on new 911s from Porsche Exclusive for $6,950. Aerokit retrofitting will also be offered by Porsche Tequipment through participating Porsche dealers for $6,886, excluding paint finish, assembly and installation.
The kit does not affect the car's factory warranty.
Edmunds says: The new aerodynamics kit promises extra grip to improve high-speed stability and handling, something that should have great appeal to owners of the 911 Turbo and 911 Turbo S.