Porsche’s new limited edition 911 GT3 RS 4.o, as you can guess, has a new 4.0 litre engine. The 500BHP race refined monster will only see a production run of 600 but those lucky enough to get hold of the keys are in for a real treat. “The best RS we have ever made” say Porsche and that is quite the statement. Here the RS 4.o takes to the track. Full details on the car HERE.