Porsche has unveiled a high performance GTS version of the Boxster. Fitted with the Porsche Sport Chrono package and Active Suspension Management as standard, the GTS also features a new front spoiler, a re-styled lower apron and black 20-inch Carrera S alloys. An uprated 3.4-litre engine adds an extra 15bhp and, when teamed with Launch Control, this propels the 2-seater from 0-62 in 4.7 seconds and on to a top speed of 174 mph.  Prices for the Boxster GTS start at £52,879 on the road.