A Shelby 427 Competition Cobra, billed as the winningest Cobra of all time, is headed to auction The car will be sold at Mecum’s 2025 Kissimmee sale Mecum’s estimate is between $4.5 million and $6 million One of the most successful original Shelby Cobras on the racetrack will go under the hammer at Mecum’s auction scheduled for mid-January in…