The bulk of Porsche’s vaunted 911 range will be getting updates through the end of the year as the German carmaker works to keep pace with new competitors from Japan and the United States. A range of new technologies and new engines will be the focus of the updates but, as these spy images show, exterior styling changes will be minimal, even for the potent 911 Turbo and Turbo Cabrio models.

The updated Turbo and Tubro Cabrio haven’t yet been officially announced, unlike the Carrera and Carrera S, which were released earlier this month. Nevertheless, leaked documents and spy photos show the company is in fact working on facelifted models expected to be revealed late this year.