Ford Mustang Boss 351
In 1971, Mustang received another thorough restyle, which would be the final one for the first generation. The car grew in size and featured a new, sharper look with a much wider track. The Boss 302 and Boss 429 versions were gone but the Grande and Mach I stayed, albeit with lower power ratings. However, there was one exciting model introduced in 1971, the Boss 351 (via Car and Driver).
Made for one year only, the ’71 Mustang Boss 351 was one of the rarest Mustangs produced with only 1800 made. It had a highly tuned version of the 351 V8 engine with around 330 hp. It was fast and more expensive than the Mach 1 version of the same model year. Today, it is a true collector’s item.