11. Shelby GT350 R
As you already know, Carroll Shelby started building Mustangs in 1965 as fire-breathing machines. He brought Ford some much-needed recognition and performance credentials. The cars responsible for his racing success were those 34 “R” models Ford produced only in 1965. Ford sold them to privateers and racing teams all over America and the world. But those cars were not street legal and were purely for racing purposes, something that they did extremely well. The GT350 R underwent numerous modifications, so it was lighter, faster, and sharper than the regular GT350.
However, the R version was powered by the same 289 V8 as the regular Shelby GT350, yet it produced close to 400 HP. The car was light and well-balanced, winning races in America, Europe, and South America. Because each GT350 had so many wins under its belt, every R model is considered to be a precious piece of Mustang history.