The Nissan GT-R has become something of a cult favorite for a number of types of enthusiasts: supercar slayers, import tuners, and especially track-day junkies. Particularly in the UK, where congestion (and a proliferation of speed cameras) prevents stretching out your car’s legs, where there are legendary racing circuits abound and where, subsequently, Nissan has now rolled out a new Track Pack for the recently updated GT-R. Funk Flex