While the visual updates are quite mild, more dramatic changes are being wrought under the skin. According to Car, the updated Boxster and Cayman models will be powered almost exclusively by a suite of turbocharged horizontally opposed four-cylinder petrol engines.
The British magazine believes that the base Boxster and Cayman models will have a 2.0-litre turbo engine slung across the middle of the car and powering the rear wheels. The base models will have about 178kW to play with; the current car has a 2.7-litre flat-six with 195kW of power.
In the step-up Boxster S and Cayman S there will be a larger turbocharged 2.5-litre four-cylinder boxer engine with around 224kW of power. At present, the S models feature a 3.4-litre six-cylinder boxer engine with 232kW of power.
At the top of the regular range will be the Boxster GTS and Cayman GTS, both of which will use a 275kW version of the 2.5-litre turbocharged boxer four. A 243kW version of the 3.4-litre flat-six powers the current GTS.
If this report proves to be accurate, the changes to the Boxster and Cayman lineup will mirror a similar move for the 911 range, which will shift to smaller turbocharged six-cylinder engines for all its regular non-GT models when the facelifted car is revealed at this year's Frankfurt motor show..
It's believed that only the special edition models, such as the GT4, that will continue to have six-cylinder motivation. Porsche will also, reportedly, allow some markets to price the Cayman coupe beneath the Boxster convertible.
The revised Boxster and Cayman ranges are expected to debut some time in 2016.