31. Shelby GT500 KR
In 1968, Ford introduced the 428 Cobra Jet engine and Carroll Shelby was about to use it in his line of Mustangs. Shelby wanted to do something special and the result was the GT 500 KR. “KR” stands for “King of the Road”. They rated the 428 Cobra Jet at 335 HP (via Supercars).
But everyone knew that the engine delivered more than 400 HP and 400 lb-ft of torque. Production was highly limited and they loaded the GT500 KR with lots of special interior luxury. Unfortunately, they only produced the GT 500 KR for the 1968 model year, dropping the version for 1969.