Ever heard of muscle cars that only flexed their rare V8 power for a single year? These legends—like the ’70 Buick GSX Stage 1 and ’69 Boss 429 Mustang—were all about insane engines, wild specs, and blink-and-you-miss-it exclusivity. From the Chevelle SS 454 LS6 to the AMX 390, these eight rides are unicorns for gearheads. If you love rare horsepower and stories behind iconic cars, this list is pure gold! #Cars #MuscleCars #CarLegends