Porsche is one the most prolific race car manufacturers in history, and the 917 is one of the biggest reasons why. A purpose-built endurance machine, the 917 gave Porsche wins at Daytona, Monza, Spa, Brands Hatch, the Austria Ring, and Watkins Glen in 1970, and also scored Porsche its first overall victories at Le Mans in 1970 and 1971. Few racecars have a resume that can compete.  The 917’s potency came from its ultra light spaceframe chassis and incredible flat-12, which was actually the first 12-cylinder engine Porsche built. It initially produced 520 hp, but was later turbocharged and tuned for Can-Am racing to make well over 1,000 hp. That makes it one of the most powerful motor sport athletes of all time.