Following an introduction at the 2015 Frankfurt Motor Show, the 991 was received a mid-cycle facelift for the 2017 model year. The updated Porsche 911 (at Porsche internally referred to as 991.2 or 991 II) introduced new styling including updated front and rear bumpers, new dual exhaust pipes along with new head and tail lights and options, along with all new, 3.0-litre twin-turbocharged flat-six engines across the range. This was the first time the standard Carrera models had adopted turbocharged engines rather than naturally aspirated ones. The 991.2 was followed by the 992 series.