Introduced at the 2014 Geneva Motor Show, the McLaren 650S took center stage as a replacement for the aging, yet still enticing, MP4-12C. Available in both coupe and roadster guises, the sports car rolled off the assembly line with the proven, twin-turbo, 3.8-liter V-8 behind its seats. Motivated by no less than 640 horses and 500 pound-feet of twist, the 650S quickly became the fastest vehicle in its segment, outgunning sports cars wearing both Ferrari and Lamborghini badges. Coming into 2015, the Brits are knighting the 650S a full-time race car by means of a GT3 iteration for the Blancplain Endurance Series and a Sprint racer. Essentially a successor to the 12C GT Sprint, the 650S Sprint is also a track-only model.