Several solutions are available for cracking the high-performance algorithm. One equation involves a sleek, attractive body; a massive displacement engine, sporty suspension and a free-flowing, dual exhaust. Add it all up and the sum is exactly what the Pontiac brand had going for it during the mid-1960s. They called it the 2+2 and the math made sense. These vehicles had all the right components to equal Pontiac’s muscle-bound, intermediate-sized GTO — but in a much larger package. The integers in the model name were drawn from the European sports car nomenclature for two passengers up front with room for two more in back.